Limit Switches
’06–’07
Limit Switches ’06–’07
ARCT1B272E 200609-1YT
Please contact ..........
Specifications are subject to change without notice. Printed in Japan.
Automation Controls Business Unit
Head Office: 1048, Kadoma, Kadoma-shi, Osaka 571-8686, Japan
Telephone: +81-6-6908-1050 Facsimile: +81-6-6908-5781
http://www.nais-e.com/
All Rights Reserved © 2006 COPYRIGHT Matsushita Electric Works, Ltd.
Matsushita Electric Works, Ltd.
These materials are printed on ECF pulp.
These materials are printed with earth-friendly vegetable-based (soybean oil) ink.
Limit Switches
ARCT1B272E ’06.9
Matsushita Electric Works, Ltd.
Matsushita Electric Works, Ltd.
13
Actuator Operating Force (O.F.) Exposed terminal type Rubber cover type Socket with cord type*
Hinge lever
Roller lever
One-way roller lever
Hinge short lever
Short roller lever
One-way short roller lever
SUBMINIATURE SIZE
LIMIT SWITCHES SL (AZ3) Micro
Limit Switches
FEATURES
1. Subminiature limit switch
Managed to miniaturize the comparative
bulk with high density mountings in the
equipment’s detector to approximately
1/3 of our own ML limit switches, or
approximately 1/1.6 of the Z model
microswitch.
2. A lamp can be easily added for
operations checks
An exposed terminal type model com-
bined with a socket with cord for the
built-in LED lamp (sold separately) easily
become a limit switch with lamp.
Convenient for maintenance checks
such as operations checks.
3. Operates with a light force
Comes in two types: O.F. is a maximum
of 1.18N {120gf} (light force model) and
light force commensurate to the
microswitch.
4. Terminal uses both solder and tab
(#110)
5. Achieves stroke tolerance
(O.T./T.T.) of 0.67
Plenty of scope for position fixing with
long life.
Because of the optimum design of the
built-in limit switch and the original L-
model spring for use in O.T. absorption,
the total travel range has been enlarged,
and both position fixing and the unit’s
lifespan have been improved a level.
Stroke range: 3 times more than the ML limit
6. Long life
By combining the excellent reliability and
solvent proofing of the FS-T microswitch
with the L shape spring, we have
achieved a unit with both long life and
high reliability (electrical life: 105
mechanical life: 107
7. Built-in safety features and excel-
lent environment proofing
The case uses 66 nylon glass fiber the
doubly protect the switch. Also, the body
and cap have been ultrasonically weld-
ed, creating a flush construction except
for the terminals. Moreover, by adding a
dedicated socket, the construction is
drip-proof, dust-proof, and dirt-proof, cre-
ating a flush construction for the unit as a
whole including the terminals.
Rubber cover type: Equivalent to IP60
Socket with cord type: Equivalent to IP64
TYPICAL APPLICATIONS
Dust proofing and oil resistance require-
ment.
PRODUCT TYPE
1. Switch body
2. Socket
1.18N {120gf} AZ3012 AZ3512 AZ3712
1.96N {200gf} AZ3022 AZ3522 AZ3722
1.18N {120gf} AZ3013 AZ3513 AZ3713
1.96N {200gf} AZ3023 AZ3523 AZ3723
1.96N {200gf} AZ3024 AZ3524 AZ3724
2.94N {300gf} AZ3025 AZ3525 AZ3725
2.94N {300gf} AZ3026 AZ3526 AZ3726
2.94N {300gf} AZ3027 AZ3527 AZ3727
Applicable limit switches
Exposed terminal types
Specifications Part No.
L socket AZ3806
Socket with cord (1 m 3.281ft.) AZ3807
Socket with cord (2 m 6.562ft.) AZ3827
Socket with cord (3 m 9.843ft.) AZ3837
Socket with cord (5 m 16.404ft.) AZ3857
Quickly upgraded to limit switches with lamps by mounting an LED lamp socket.
ML
Approx. 1/3
r
SL
SL limit with lamp
Socket with
SL exposed
LED lamp
terminal type
LED lamp
RoHS Directive compatibility information
http://www.nais-e.com/
Rubber cover type (roller lever)
Notes) 1. Socket with cord type is combination of; Exposed terminal type + Socket with cord (cord length: 1m 3.281ft.)
2. UL reconized, CSA certified type available. (See page 14.)
SL (AZ3)
14
Cord length Part No.
2m AZ38 7∗6∗
3m AZ38 7∗6∗
5m AZ38 7∗6∗
Applicable limit switches Lamp Connection Lamp rating Part No.
Expoced terminal types
3. Socket with LED (cord length: 1m 3.281ft.)
Normally open (N.O.) connection
Normally closed (N.C.) connection
6V DC AZ3807162
12V DC AZ3807161
24 to 48V DC AZ380716
6V DC AZ3807362
12V DC AZ3807361
24 to 48V DC AZ380736
Notes) 1. Types with 24 to 48V DC lamp rating are recommended for PC input use.
2. The following cord lengths are also available and lot-produced upon request.
2
3
5
The 5th digit (boxed) of part number denotes the length of cord.
Numerals come in the asterisked (∗) digits, which show the lamp specifications.
The 7th digit: 1: N.O. connection, 3: N.C. connection
The 9th: None: 24 to 48V DC, 1: 12V DC, 2: 6V DC
Standards Applicable product Part No.
UL recognized product File No.: E122222
Ratings: 105rating 4A, 250V AC
Product type: All products
CSA certified product File No.: LR55880
Ratings: 105rating 4A, 250V AC
Product type: All products excluding types with socket and cord.
Add “9” to the end of the part No.
FOREIGN STANDARDS
Rated control voltage 125V AC 250V AC 30V DC 125V DC
4A 4A 4A 0.1A
2.5A 2.5A 2.5A 0.1A
Resistive load (cos
φ
]1)
Inductive load (cos
φ
]0.4)
SPECIFICATIONS
1. Rating
Contact arrangement 1 From C
Initial contact resistance, max. 60 mΩ(By voltage drop 5 to 6V DC 1A)
Contact material AgNi contact
Initial insulation resistance (At 500V DC) Min. 100MΩ
Initial breakdown voltage
Expected life (min. operations)
Between non-consective terminals 1000 Vrms for 1 min
Between dead metal parts and each terminal 1500 Vrms for 1 min
Between ground and each terminal
Mechanical
Electrical
1500 Vrms for 1 min
107(at 60 cpm)
105(at 20 cpm, 4A 250V AC resistive)
Ambient temperature –20 to +60°C-4 to +140°F
Ambient humidity Max. 95% R.H.
Max. operating speed 120 cpm
2. Characteristics
Actuator Hinge lever Roller lever One-way roller
lever Hinge short
lever Short roller
lever One-way short
roller lever
Operating Force (O.F.) 1.18N {120gf} 1.96N {200gf} 1.18N {120gf} 1.96N {200gf} 1.96N {200gf} 2.94N {300gf} 2.94N {300gf} 2.94N {300gf}
Shock resis-
tance, min.
Vibration
resistance
In the free position 98m/s2{10G} 294m/s2{30G} 98m/s2{10G} 196m/s2{20G} 147m/s2{15G} 294m/s2{30G} 196m/s2{20G} 147m/s2{15G}
In the full operating position
294m/s2{30G} 294m/s2{30G} 294m/s2{30G} 294m/s2{30G} 294m/s2{30G} 294m/s2{30G} 294m/s2{30G} 294m/s2{30G}
Vibration rate 10 to 55Hz 10 to 45Hz 10 to 55Hz 10 to 45Hz 10 to 55Hz 10 to 55Hz 10 to 55Hz
Double amplitude 1.5mm .059inch
1.0mm .039inch 1.5mm .059inch 1.0mm .039inch 1.5mm .059inch 1.5mm .059inch 1.5mm .059inch
3. Mechanical characteristics
Characteristics
Actuator O.F.(N{gf}) max. R.F. (N{gf}) min. Pretravel (P.T.),
max. mm inch
Movement
Differential (M.D.),
max. mm inch
Overtravel
(O.T.),
min. mm inch
Operating Position
(O.P.) mm inch
Hinge lever 1.18 {120} 1.96 {200} 0.24 {25} 0.49 {50} 3.0 .118 1.5 .059 6.0 .236 16.7±1.5 .657±.059
Roller lever 1.18 {120} 1.96 {200} 0.24 {25} 0.49 {50} 3.0 .118 1.5 .059 6.0 .236 30.7±1.5 1.209±.059
One-way roller lever 1.96 {200} 0.49 {50}
2.94 {300} 0.59 {60}
2.94 {300} 0.59 {60}
2.94 {300} 0.59 {60}
3.0 .118 1.5 .059 6.0 .236 40.5±1.5 1.594±.059
Hinge short lever 2.0 .079 1.0 .039 3.5 .138 13.7±1.5 .539±.059
Short roller lever 2.0 .079 1.0 .039 3.5 .138 27.7±1.5 1.091±.059
One-way short roller lever 2.0 .079 1.0 .039 3.5 .138 36.7±1.5 1.445±.059
4. Operating characteristics
Note) For the operating characteristics, refer to the TECHNICAL INFORMATION.
Protective construction
IEC Rubber cover type
Types with socket and cord
IP60 
IP62 –
IP63 –
IP64 –
5. Protective characteristics
Rated operating voltage Operating voltage range Internal resistance
6V DC 5 to 15V DC 2.4KΩ
12V DC 9 to 28V DC 4.7KΩ
24 to 48V DC 20 to 55V DC 15KΩ
6. LED rating
SL (AZ3)
15
15
57
16
12.58 dia.
.630
12.4
.488 .492.315
reinforced nylon 66 roller
mounting hole
4.5±0.1 dia.
.177±.004
14±0.2
.551±.008
24.1
.157
41.063
27
3 max.
(PT)
.118
28±0.2
1.102±.008
37
1.457 24.5
.197
5
.965
8
.315
8
.315
15
.591
2.244
.591
4.3±0.1 dia.
.169±.004
mounting
hole
OP
30.7±1.5
33.7
1.209±.059
1.327
.949
dia. glass fiber
DATA WIRING DIAGRAMS
1. Life curve 2.Actual load life curve
500
3
20
12
60
40
100
80
Load current (A)
456
Resistive load 250V AC
1,000
No. of operations (104)
FC-10
VC 20
0.5
NK
500
3
HP
1
HC
5
HG
Various relay loads (VA)
700
FC-100
50 260
FC-35
1,000
No. of operations (104)
Note: The FC magnetic contactor series is 200V AC.
The NK is 2 Form C 24V DC type.
→
DIMENSIONS
1. Rubber cover
Hinge lever
Roller lever
COM
N.O.
SL 1
N.C.
3
2
mm inch
AZ3512
AZ3522
AZ3513
AZ3523
One-way roller lever Hinge short lever
AZ3524 AZ3525
16
57
2.244
27
1.063
14±0.2
.551±.008
.157
4
24.1
.177±.004
mounting hole
4.5±0.1 dia. .315
8
.591
15
.630
28±0.2
1.102±.008
37
1.457 .965
24.5
.197
5
.315
8mounting
.169±.004
4.3±0.1 dia.
hole
12.58 dia.
.492.315
reinforced nylon 66 roller
(PT)
3 max.
.118
40.5±1.5
43.5
OP
1.594±.059
1.713
25
.984
Bracket deflection
angle 90°
12.4
15.4
.606
.488
dia. glass fiber
.949
40
24.5
O.P.
28±0.2
37
27
5
(P.T.)
16
.630
7
.276
1.102±.008
1.063
1.457 .965
.197
mounting hole
4.5±0.1 dia.
.177±.004
24.1
14±0.2
.551±.008
.157
4
.315
8
.591
15
2 max.
.079
1.575
4.3±0.1 dia.
.169±.004
mounting hole
.315
8
13.7±1.5
F.P.
(.618)
.539±.059
(15.7)
.949
Short roller lever One-way short roller lever
AZ3526 AZ3527
36
(29.7)
15
16
mounting hole
4.3±0.1 dia.
.169±.004
12.4
mounting hole
4.5±0.1 dia.
.177±.004
24.1
.551±.008
14±0.2
.157
4
28±0.2
1.102±.008
1.457
37
1.063
27
5
.197
.965
24.5
.591
1.417
.591
15 .315
8
.630
.488
27.7±1.5
(O.P.)(1.169)
1.091±.059
2 max.
.079
(P.T.)
.492.315
reinforced nylon 66 roller
12.58 dia.
.315
8
dia. glass fiber
.949
12.4
36
P.T.
27
(O.P.)
(39.5)
16
12.58 dia.
.492.315
reinforced nylon 66 roller
15.4
.606
.488
.630
angle 90°
Bracket deflection
25
.984
1.417
14±0.2
.551±.008
24.1
4
.157
.177±.004
4.5±0.1 dia.
mounting hole
.591
15
8
.315
28±0.2
37
1.102±.008
1.457 .965
24.5
.197
5
1.063
8
.315
2max.
.079
(1.555)
1.445±.059
36.7±1.5
4.3±0.1 dia.
mounting hole
.169±.004
dia. glass fiber
.949
General tolerance: ±0.4 ±.016
General tolerance: ±0.4 ±.016
General tolerance: ±0.4 ±.016
SL (AZ3)
16
Approx.
17.0
M3 mounting screw
Vinyl cabtire
16
14.8 8
8.7
23
White: NO
Red: NC
Black: COM
12.4
57
2.244
27
1.063
14±0.2
.551±.008
.157
4
24.1
.177±.004
mounting hole
4.5±0.1 dia. 28±0.2
1.102±.008
37
1.457
.197
5
.315
8
mounting hole
4.3±0.1 dia.
25
.984
Bracket deflection
angle 90°
40.5±1.5
1.594±.059
1.713
43.5
OP
(PT)
3 max.
.118
E
cord (VCTF)
0.75 3 wire
1000
.669
12.58 dia.
.492.315
reinforced nylon 66 roller
15.4
.606
.488
.583
.630
.343
.315
.906
dia. glass fiber
.169±.004
.949
39.370
2) After stripping the sheath from the
appropriate cord (refer to table on the
right) and removing the covering of the
lead wires, insert the cord into the rubber
cover.
2. Exposed terminal type
Hinge lever
3. Socket with cord type
One-way roller lever
AZ3012
AZ3022
AZ3724
61
28±0.2
37 8.7
5
27
7
3-tab (#110)
16
10
2
1
35
OP
14±0.2
.551±.008
24.1
4
.157
.177±.004
4.5±0.1 dia.
mounting hole
16.7±1.5
2.402
1.063
1.102±.008
1.457 .343
.197
8
.315
3max.
(PT) .118
.657±.059
19.7
.776
mounting hole
4.3±0.1 dia.
terminals (t=0.5)
.315
8
.394
.630
.197
.276
.949 .169±.004
General tolerance: ±0.4 ±.016
Note) The following types are also available.
Roller lever: AZ3013, AZ3023
One-way roller lever: AZ3024
Hinge short lever: AZ3025
Short roller lever: AZ3026
One-way short roller lever: AZ3027
(Combination of the AZ3024 exposed terminal type and the AZ3807 socket with cord type)
Note) The following types are also available.
Hinge lever: AZ3712, AZ3722
Roller lever: AZ3713, AZ3723
Hinge short lever: AZ3725
Short roller lever: AZ3726
One-way short roller lever: AZ3727
1) Remove the rubber cover from the
limit switch.
CONNECTION METHOD FOR RUBBER COVER
3) Connect lead wire to the receptacle
terminals (#110) with insulating sleeve
provided and insert it into the terminal of
limt switch. (The lead wire can directly be
soldered to the terminals without using
receptacle terminals)
4) Push the rubber cover securely over
the terminals.
Wire name
Vinyl cabtire
cord (VCTF)
Applicable wire
Conductor
Wire strand
Finished out-
side diameter
0.75mm22-wire
6.6mm .260inch dia.
0.75mm23-wire
7.0mm .276inch dia.
mm inch
17
SL (AZ3)
CAUTIONS
1. Ambient conditions
1) The use of these switches under the
following conditions should be avoided.
If the following conditions should become
necessary, we recommend consulting us
first.
• Use where there will be direct con tact
with organic solvents, strong acids or
alkalis, or direct exposure to their vapors.
• Use where inflammable or corrosive
gases exist.
• Because these switches are not of
water resistant or immersion-proof con-
struction, their use in water or oil should
be avoided. Also, locations where water
or oil can normally impringe upon the
switch or where there is an excessive
accumulation of dust should be avoided.
2) To improve reliability during actual
use, it is recommended that the opera-
tion be checked under installation condi-
tions.
3) If OT is too big, the life of limit switch
will be shortened switching friction. Use it
with enough margin of OT. 70% of OT
standard value will be good for use.
4) Do not use the switch in a silicon
atmosphere. Case should be taken
where organic silicon rubber, adhesive,
sealing material, oil, grease or lead wire
generates silicon.
5) Avoid use in excessively dusty envi-
ronments where actuator operation
would be hindered.
6) When used outdoors (in places where
there is exposure to direct sunlight or
rain such as in multistory car parks) or in
environments where ozone is generated,
the influence of these environments may
cause deterioration of the rubber materi-
al. Please consult us if you intend to use
a switch in environments such as these.
2. Mounting and wiring
1) Although SL limit switches have large
over-travel (O.T.), excessive O.T. will
occur wear and change in its characteris-
tics. Specifically, where there is a need
for long life, it is recommended that the
proper O.T. as given below should be
used. Specifically, where there is a need
for long life, it is recommended that the
proper O.T. as given below should be
used.
•Within 1 to 3mm .039 to .118inch
2) When the operating object is in the
free condition, force should not be
applied directly to the actuator.
3) Use their own accessories when
mounting and wiring SL limit switches so
as to maintain their own characteristics.
When the SL rubber cover type is used,
there should absolutely be no tension
applied to the cord. If there is the fear
that tension may be applied, the L socket
or socket with cord attached should be
used. The maximum permissible tension
with the above socket use is
98N{10kgF}.
4) The tightening torque when installing
this limit switch should be 1.18 to 1.47
N·m (12 to 15 kg·cm).
2
One-way roller leverRoller leverHinge lever
Short
Long
AZH20
22
Classification Subminiature size Compact size
Product name SL (AZ3) Micro
Limit Switches
HL (AZH)
Limit Switches
(Die cast case)
HL (AZH)
Limit Switches
(Die cast case)
HL (AZH)
Limit Switches
(Plastic case)
ML (AZ7)
Limit Switches
(standard)
ML (AZ7)
Limit Switches
(Epoxy-Sealed terminal type)
Feature
Dust-proof type
IP60
IP64
IP65
IP67
–
Abrasion-proof type
Surge-proof type
Corrosion-proof type
Oil-resistant type
Neon
LED
Mechanical
Life
(Min.ope.)
Operating force
(max.)
(hinge lever type)
Available
actuators
Terminals
Wiring
Mounting pitch
(Applicable screw)
Available standards
Page
Electrical
Ratings
(load resistance)
Protective construction
With lamps
• A limit switch with
high-density mounting
that improves stroke
capacity through an
O.T. absorption-type
spring.
• LED lamp type also
available.
Rubber-cover type
Socket with cord type

 –
 –––
 –––
 –
–––––
–
(with LED lamps)
[Bifurcated type]
–––
10A250V AC
10A125V AC
0.4A115V DC
10A250V AC
10A125V AC
0.4A115V DC
–
––
––
–
––
–
4A250V AC
4A125V AC
4A30V DC
0.1A 125V DC
107107107107107107
105
0. 98N {100gf}
1. 96N {200gf}
(short lever type)
2. 94N {300gf}
• Rubber cover (Solder
and quick connect
(#110) terminal)
• Socket with cord
Cabtire code
Cross-angled wiring
28 14mm
1.102 .551inch
(M4 screw)
UL, CSA
P.13 P.18 P.18 P.18 P.33 P.33
UL, CSA, TÜV, CE UL, CSA, TÜV, CE UL, CSA, TÜV, CE UL, C-UL, TÜV, CE –
33mm 1.299inch
(M4 screw) 33mm 1.299inch
(M4 screw) 33mm 1.299inch
(M4 screw) 25.4mm 1.000inch
(M4 screw) 25.4mm 1.000inch
(M4 screw)
Cabtire code Cabtire code Cabtire code Cabtire cable Cabtire cable
Screw terminal Connector terminal Screw terminal Screw terminal Vinyl cabtire cable
(1m 3.281ft)
2.45N {250gf}
3. 92N {400gf}
11.8N {1,200gf}
(Plunger type)
2.45N {250gf}
3.92N {400gf}
11.8N {1,200gf}
(Plunger type)
2.45N {250gf}
3. 92N {400gf}
1.47N {150gf}, 1.77N {180gf},
1.96N {200gf}, 2.16N {220gf},
2.35N {240gf}, 2.75N {280gf},
5.88N {600gf} max.
1.47N {150gf}, 1.77N {180gf},
1.96N {200gf}, 2.16N {220gf},
2.35N {240gf}, 2.75N {280gf},
5.88N {600gf} max.
5x1055x1055x1052x1052x105
[Standard type]
5A125V AC
5A250V AC
5A8V DC
5A14V DC
5A30V DC
0.5A125V DC
0.25A250V DC
[Standard type]
5A125V AC
5A250V AC
5A8V DC
5A14V DC
5A30V DC
0.5A125V DC
0.25A250V DC
[Bifurcated type]
0.1A125V AC
0.1A8V DC
0.1A14V DC
0.1A30V DC
[Bifurcated type]
0.1A125V AC
0.1A8V DC
0.1A14V DC
0.1A30V DC
without LEDlamps
0.1A125V AC
0.1A8V DC
0.1A14V DC
0.1A30V DC
with LEDlamps
0.1A24V AC
• High sealability that
satisfies IEC IP67.
• Wiring is screw-ter-
minal type.
• Bifurcated type also
available.
• High sealability that
satisfies IEC IP67.
• Less wiring, less
installation connec-
tor type.
• LED lamp type also
available.
• Bifurcated type
available.
• Perfect for applica-
tions that prioritize
economy.
• Switches installed
with both economical
and compact Z-basic
microswitches and
limit switch protective
construction.
• Coil spring system
provides long life.
• An ML compact limit
switch with an
epoxy-sealed case
that completely
encloses the
terminal.
Appearance
Head code AZ3 AZH23 AZH10
12 AZ7 AZ7
SELECTOR CHART
Note: Excludes limit switch replacement parts
Actuators
Push plunger Roller plunger Cross-roller plunger Roller arm Adjustable roller arm Adjustable rod Fork
Spring wire Flexible rod Roller lever
Short
Long
Short
Long
3
IP60
IP64
IP65
IP67
–
Neon
LED
Mechanical
Electrical
Classification
Product name
Feature
Life
(Min.ope.)
Operating force
(max.)
(hinge lever type)
Available
actuators
Terminals
Wiring
Mounting pitch
(Applicable screw)
Available standards
Ratings
(load resistance)
Protective construction
With lamps
Appearance
Head code
Dust-proof type
Abrasion-proof type
Surge-proof type
Corrosion-proof type
Oil-resistant type
Page
Subminiature size
vertical type Compact size vertical type Vertical type Touch type
QL (AZ4) Micro
Limit Switches DL (AZD1) Mini
Limit Switches VL (AZ8) Mini
Limit Switches AZ5
Limit Switches VL-T Mini Touch
Limit Switches


–––
––
–
–– –
––
–
–

Input voltage
12-24V DC
Output current
150mA
6A250V AC
6A380V AC
5A24V DC
107107107107107
P.38 P.44 P.52 P.61 P.68
UL, CSA UL, C-UL, TÜV, CE UL, C-UL, TÜV, CE UL –
14 28mm
.551 1.102inch
(M4 screws)
22 (47mm)
.866 1.850inch
(M4 screws)
21 56mm
.827 2.205inch
(M4 screws)
30.2 58.7mm
1.189 2.311inch
(M5 screws)
Cabtire code Cabtire code Cabtire cord
Cap tire cable Cabtire cable
(wiring type) Cabtire cord
Cabtire cable
21 56mm
827 2.205inch
(M4 screws)
• L socket (Solderand
quick connect
(#110) terminal)
• Socket with code
Screw terminal
(Conduit connec-
tors: PF: 1/2, PG:
13.5 types)
Screw terminal Screw terminal Screw terminal
6.86N {700gf}
(Plunger type)
1.11N {113gf}, 4.41N {450gf}
(Arm type)
6.37N {650gf}
4.90N {500gf}
3.29N {400gf}
0.88N {90gf},
5.88N {600gf},
8. 83N {900gf},
19.16N {2,000gf}
1.39N {142gf}
26.67N {2,720gf} –
3x1051.5x1053x1055x105–
5A250V AC
[Standard type]
5A250V AC
5A125V AC
0.4A125V DC
[With lamp type]
[Neon lamp type]
5A 240V AC
5A 125V AC
[LED lamp type]
3A 24V DC
[Standard type]
10A125V AC
6A250V AC
2A500V AC
0.8A125V DC
[With lamp type]
[Neon lamp type]
10A 125V AC
6A 240V AC
[LED lamp type]
6A 24V DC
L socket type
Socket with cord type

–
–
–
––
–
• A subminiature, highly accu-
rate limit switch with built-in
environment-proof functions.
• Cord extraction can be
changed in four directions,
due to the dedicated L socket.
• LED lamp can also be
attached.
• Excellent safety even if the
contact point is welded,
due to the forced contact
opening mechanism.
• Block mount system makes
parts replacement easy.
• Conforms to DIN stan-
dards.
• In addition to the
characteristics of
stand mounted limit
switches, is com-
pact, easily instal-
lable, highly reli-
able, lightweight,
and economical.
• Built-in dedicated
circuit breaker
(1 Form A
1 Form B).
• Different types of
actuator avail-
able.
• Operate just by
touching lightly.
• Comes with sen-
sitivity adjustment
function and indi-
cates operations.
• VL type touch
limit switch
AZ4 AZD1 AZ8 AZ5 AZ84
Door switch
Compact
Magnelimit Magnelimit
––
––
––
1) –
––
––
––
2)
5A (2A) 125V AC
5A (2A) 250V AC
5A (2A) 30VDC
5A 125V AC
5A 250V AC
5A 30VDC
105105
P.72 P.74
UL, C-UL UL, C-UL, CE
Cabtire cord Cabtire cord
30mm 1.181inch
(M3) 52mm 2.047inch
(M4)
Tab #110 terminal
Lead wire Screw terminal
–3.43N {350gf}
5x1045x104
• Secured by magnet
•
Built-in switch detection
Dual-role switch in
one unit.
• Safe design prevents
operator making
errors.
• Secured by magnet
•
Built-in switch detection
Dual-role switch in
one unit.
• Construction possi-
ble with 100V AC
power.
AZC3 AZC1
Free attachment
Other listed products
Product name PS Hall Sensors
Appearance
AN9
Detector distance 2.5mm .098inch
Feature
Page
• Magnetic detector type subminiature sensor
• Perfect for slide table limiting
• Economical price with operating display lamp attached.
P.76
Notes: 1) Excludes exposed part of terminals, externally mounted components, and magnet catches.
2) Figures in parentheses ( ) indicate rated current of water-resistant type.
4
Type Classification
Push plunger type Small Medium Large Excellent Excellent High-level accuracy gives firm detection for position
fixing, etc., by using perpendicular movement.
Roller plunger type
(includes cross
roller plunger) Small Medium Large Excellent Excellent Operating range can be widened by mounting
accessory actuators like cams, dogs, cylinders, etc.
High-level detection for position fixing.
Roller arm type Small to
large Large Medium Good to
excellent Excellent
The stroke in the direction of revolution is large at
between 45° and 90° and the lever angle can be set
at will to within 360° for easy use. Wide angle type
(large O.T.) available. Can be used for wide-range
position fixing.
Adjustable roller
arm type Small to
large Large Medium Good to
excellent Good Lever length can be altered to allow rough operation
detection using the roller lever characteristics.
Adjustable rod type Large Large Medium Good Good
Wide range of operations, and convenient for
uneven mountings. Lightest operation among the
revolving operation type of limit switches. Rod length
is adjustable, and bending is also easy.
Fork Large Medium Medium Good Excellent
If operated up to 55° position, revolves automatically
to retain 90° position. Two dog operation enables
recovery operation through single dog, or for any-
thing that has caused the roller position to slip.
Spring wire and
flexible rod Medium Large Small Possible Possible
Excluding the thread direction, direction can be
adjusted up to 360°. Operating power is the lowest
of the limit switches, and is effective in detecting
when direction and conditions are uneven. In order
to absorb the movements after operation in the actu-
ator part, work slippage tolerances are also large.
Hinge lever type Large Medium Small Possible Possible Using a low speed, low torque cam, the lever can
assume various shapes suited to the operation. The
lever is very sturdy.
Roller lever type Large Medium Small Possible Possible Suited to high speed cams through the attachment
of a hinge roller lever.
One way roller lever
type Medium Medium Medium Possible Possible
Operation is possible with both hinge lever type and
one way operation, but the roller will break if operat-
ed in the opposite direction, rendering the unit inop-
erable. Can be used to prevent opposite direction
movement.
Roller lever type Medium Medium Medium Possible Possible The roller position can be changed.
Pretravel
(P.T.) Overtravel
(O.T.) Operating
force (O.F.) Accuracy Vibration
shock Characteristics
ACTUATOR SELECTION
5
Standard glossary
•Fixed rating values
The values that guarantee the stan-
dards for the limit switch characteris-
tics and functions. For example, the
rated current and rated voltage,
which are preset conditions (load
type, current, voltage, frequency,
etc.)
•Operating object
The mechanism and mountings that
operate the limit switch actuator.
Used for mechanical operators
such as cams and dogs.
•Detective object
The unit other than mechanical
mountings that operate the limit
switch. Products, parts, jigs, etc.
•Reaction spring (movable spring)
The mechanical part that switches
the limit switch contact is called
either the reaction spring or the
moveable spring.
•Contact
When the counter-spring revolves,
power is switched on and off through
the contact between metal parts
•Contact gap
The effective clearance between the
fixed contact and the moveable con-
tact. Also called breaking distance.
•Contact arrangement
The construction of the electrical
input/output circuit depending on
use. For example, the following two
applications:
•Contact type
Used in opposition to a semiconduc-
tor switch that has switching charac-
teristics. Fulfills switch functions
through a mechanical ON/OFF con-
tact.
•Terminal mold
After wiring, the connecting part is
molding by epoxy resin for water-
proof, oil-resistant and dust-proof
capabilities.
CONSTRUCTION
•Actuator
This part directly detects movement
of the dog, cam, and so forth in the
operating unit, and transmits external
force to the changeover mechanism,
thereby engaging the moveable con-
tact and operating the switch.
•Headblock
An independent part of the actuator
mechanism of the Limit Switch.
•Wiring vent (cord vent)
The seal on the wiring at the mouth
of the wiring vent. Also called the
conduit vent for the screw hole used
in the wiring.
•Terminals
The part of the wiring work in the
wiring that forms the circuit for elec-
trical input and output.
OPERATING CHAR-
ACTERISTICS
•Operating Force (O.F.)
The force required to cause contact
snap-action. It is expressed in terms
of force applied to the actuator.
•Release Force (R.F.)
The force to be applied to the actua-
tor, at the moment contact snaps
back from the operated position to
unoperated position.
•Pretravel (P.T.)
Distance of the actuator movement
from free position to operating posi-
tion.
•Overtravel (O.T.)
The distance which the actuator is
permitted to travel after actuation
without any damage to the switching
mechanism.
•Total Travel (T.T.)
The distance which the actuator is
permitted to travel from free position
without any damage to the switching
mechanism.
•Movement Differential (M.D.)
The distance from operating to
release position of the actuator.
•Operating Position (O.P.)
The position of the actuator when the
traveling contact snaps to the fixed
contact.
•Release Position (R.P.)
The position of the actuator when the
traveling contact snaps back from
the operating position to its original
position.
•Free Position (F.P.)
Position of the actuator when no
force is applied to it.
TECHNICAL INFORMATION
[1 Form C(Single Pole Double Throw)]
F
[1 Form Z(Double Break Double Make)]
COM
F
N.O. N.C.
N.C. N.C.
N.O. N.O.
Cord vent
Front view
Reset spring
Pushbutton
Roller
Cam
Reset spring
Plunger
Roller
Arm
Head block
Pushbutton
Cam
Roller
Actuator
VL limit switch
R.T.
O.F.
F.P.
O.T.T.F.
M.D.
Standard position
O.P.
P.T.
R.P.
T.T.
R.P.
O.T.
M.D.
O. P. Operating position
R.P.
R.F.
O. P. Operating position
P.T. P.T.
Free position
O.T.
M.D.
Note: F.P., O.P., and R.P. are expressed as distances
from the standard position.
6
•EN60947-5-1
EN standard same as IEC947-5-1
•Utilization categories
The following examples express the
classification of switches by category
of use.
•Rated impulse withstand voltage
(Uimp)
The peak impulse current value
which enables the switch to resist
without insulation breakdown.
•Rated enclosed thermal current
(Ithe)
The current value that enables cur-
rent to flow without exceeding the
specified maximum temperature in
the recharging contact switch. If the
pins are made of brass, the maxi-
mum temperature limit is 65°C 149°F.
•Conditional short circuit current
The current the switch can resist
until the short circuit protection
device is activated.
•Short circuit protection device
A device that protects the switch
from short circuits through a circuit
break (breakers, fuses, etc.)
•Switching overvoltage
The surge momentarily generated
when a circuit is closed. Must be
lower than the Uimp value.
•Pollution degree
Expresses in levels the environment
in which the switch is used. The four
levels are shown below.
Limit switches come under contami-
nation level 3.
Glossary relating to the EN60947-5-1
•Rated operational voltage (Ue)
The maximum rated voltage for
switch operation. This must never
exceed the maximum ratings insula-
tion voltage (Ui).
•Rated operational current (Ie)
The maximum rated current for
switch operation.
•Rated insulation voltage (Ui)
The maximum rated current value
which guards the switch’s insulation
functions, forming the parameters for
the resistance values and the mount-
ing distance.
Current
type Category Contents
AC AC-15 Controls electromagnetic
loads in excess of 72VA
(Volt Amperes.)
DC DC-12 Controls resistance
loads and semiconductor
loads.
Pollution
degree Contents
1No contamination or, even if conta-
mination is present, only non-con-
ducting contamination is generated.
2
Normally, only non-conducting cont-
amination is generated, but there
remains the possibility of temporary
conducting contamination when the
circuit is formed.
3
Conducting contamination is gener-
ated, or else dry non-conducting
contamination is generated by cir-
cuits which can be anticipated.
4Permanent conducting contamina-
tion is generated by dust, rain,
snow, and other conductors.
TECHNICAL INFORMATION
7
Protection against spray
No damage incurred when sprayed with a jet of water
for 3 minutes from all directions, as per the diagram
on the left.
Protection level and test methods
Protection level
Level
Protection level and test methods
Protection level
Level
Protective construction
Expresses the degree of protective construction that guards the level of functionability of the switch against ingress of solid
objects, water, and oil. The standards are IEC529 (IEC: International Electrotechnical Commission) standards. IEC standards
determine the level of protection against both water and solid objects, but not against oil.
Protection against both water and solid objects
PROTECTIVE CONSTRUCTION
0— No particular protection
4—
Protection against solid
objects exceeding
1mm .039inch in size.
A hard wire 1mm dia. .039 inch dia. across cannot
penetrate the inside.
5—
Protection against dust
The unit is left for 8 hours in an atmosphere in which
2kg of talcum powder per 1m3is floating. No damage
incurred from talcum powder penetrating the inside.
6Dust-proof
Protection againt dust
(dust does not penetrate)
The unit is left for 8 hours in an atmosphere in which
2kg of talcum powder per 1m3is floating. The talcum
powder does not penetrate the inside.
3Rain-proof
Protection against rain fall
No damage incurred when sprayed with water
continuously for 10 minutes at angles of up to 60°
from the perpendicular.
4Foam-proof
Protection against flying foam
No damage incurred when sprayed with water
continuously for 10 minutes at angles of up to 180°
from the perpendicular across a wide area.
5Spray-proof
6Water proof
Protection against waves
Water does not invade the interior when sprayed with
a jet of water for 3 minutes from all directions, as per
the diagram on the left.
7Corrosion-
proof
Protection against corrosion while
immersed in water
Water does not invade the interior during immersion
for 30 minutes at a depth of 1m 3.281ft..
Protection
against water
Protection against
solid objects
IP- □ □
Note: 1. All of the tests cited above were conducted with the cord vent (conduit vent) tightly shut.
2. The above protective constructions are based on IEC standard but major differences may arise due to length of use and operating environment.
This should be thoroughly discussed and verified.
3. When the corrosion-proof model is immersed in water for 30 minutes or more, verify that no water has penetrated the inside before use.
3m
9.843ft.
Nozzle radius 6.3mm .248inch
Water pressure 30kP
3m
9.843ft.
Nozzle radius 12.5mm .492inch
Water pressure 100kP
1m
3.281ft.
1.0 .039 dia.
8
αVmax (m/s)
CAUTIONS FOR USE
Pay attention to the following points
when designing the dog for limit switch
operation.
1. Make the dog faceplate as smooth
as possible.
2. Adjust both the dog angle and the
set arm angle as below, depending on
the operating speed.
3. The depth (h) of the dog effects the
lifespan of the limit switch. Therefore,
set the depth to a maximum of 80% of
the Total Travel (T.T.)
4. The relationship between the speed
of the dog (V = m/s) and the tip angle
(α) is as follows:
1) V&0.2m/s
3) 0.5m/s !V&2m/s
Because the arm jiggle is as a mini-
mum at a comparative speed such as
V&0.5m/s, setting both the dog angle
so that it travels perpendicularly and
the arm angle to 45° is optimum.
If overriding the dog, set the arm per-
pendicularly, so that α=45°. If the dog
angle is reduced, the tolerable speed
is increased.
5) Roller plunger type
DESIGN OF OPERATING DOG AND OPERATING SPEED
When V&0.2m/s, set the arm to per-
pendicular and set the arm rise angle
to between 45° and 90°. If the dog rise
angle is reduced, the maximum tolera-
ble speed is increased.
As a rule, α= 45° is optimum.
2) V&0.5m/s
The maximum tolerable speed can be
extended by further reducing the dog
rise angle from 45° when 0.5m/s !
V&2m/s. It is necessary to set the arm
so that the dog’s cutting surfaces are
always parallel (
θ
o = 90°– α)
4) Overriding the dog (V&0.2m/s)
h
V
α = 45° to 90°
F
o
h
α
V
θ
F
h
Vα = 45°
o = 45°
θ
h
αα
h
αα
45° 0.2
60° 0.1
60 to 90° 0.05
αVmax (m/s)
Even if overriding the dog, set the for-
wards and rearwards motion exactly
the same, and avoid any settings that
make the actuator accelerate rapidly
from the dog.
5. Operation speed
1) When the operation (acting and
reverting) speed is exceedingly slow,
switching of the contacts will become
unstable and this could cause prob-
lems such as failure to make contact
and welding. As a guide, the speed
should be at least 1mm/s.
2) When the operation (acting and
reverting) speed is exceedingly fast,
be careful because the violent motion
could cause breakage and with
increased frequency, contact switching
will not be able to keep up. As a guide,
the switching frequency should be
within 20 times per minute.
20° 0.5
30° 0.25
h
(0.5 to 0.7) T.T.
(0.6 to 0.8) T.T.
αVmax (m/s)
45° 0.2
60° 0.1
60 to 90° 0.05
αVmax (m/s)
40° 0.7
35° 0.9
30° 1.3
25° 2.0
9
1. The ON/OFF circuit for the guidance
load may suffer contact damage due to
surges or inrushes when the power is
turned either ON or OFF.
Consequently, insertion of a protective
circuit as per the following diagram is
recommended, in order to protect the
contacts.
2. Do not connect either irregular poles
or power sources to a switch contact.
Power connection examples (irregular
pole connection)
3. Avoid circuits where power may find
a way between the contact points (as
this may cause welding.)
PROTECTION CIRCUIT
Circuit Cautions for use
(1) r must be a minimum
of 10Ω;
(2)
When using AC power:
Q
Impossible when R
impedance is large.
W
Possible when c, r
impedance is suffi-
ciently small com-
pared with R imped-
ance.
Can be used with both
AC and DC as appro-
priate.
r~R
C: 0.1 µF
Limit switch contact
Limit switch contact
(1) Dedicated DC use.
(2) AC is impossible
Limit switch contact
Can be used with both
AC and DC as appro-
priate.
Limit switch contact
cr R
c
r
R
Diode R
Varistor
ZNR R
Example of unsuitable power connec-
tion (abnormal power connection)
NO GOOD
Load
L
Load
Load connected to same pole
GOOD
Load
L
Load
Load
L
AC
DC
Risk of AC and DC being mixed.
NO GOOD Load
L
4. Using electronic switch circuits (low
power, low current)
1) Bouncing and chattering are gener-
ated due to collision between the con-
tacts when the limit switch is switching
between them, and this sometimes
causes such problems as white noises
and error pulses in both the electronic
circuit and the reverberation equip-
ment.
2) If the generation of bouncing and
chattering becomes a problem, it is
necessary to consider installing a CR
circuit or other absorption circuit given
the circuit design.
3) This is particularly necessary when
high contact reliability is needed, and
is unsuitable for silver contact switch-
es. Switches with gold contacts pos-
sess excellent performance.
L
100V
200V
NO GOOD
~
~
CAUTIONS FOR USE
CAUTIONS FOR USE
10
1) Do not attempt to physically alter
any part of the switch itself, such as
the actuator, or switch attachment
vent, as this may cause alterations to
both characteristics and performance,
and damage the insulation.
2) Do not pour any lubricants such as
oil or grease onto the moving parts of
the actuator, as there is a possibility
that this will cause a malfunction due
to seepage into the inside, and impair
the motion. Silicon-based grease in
particular affects the contact points
badly.
3) If the switches are not to be used for
an extended period of time, their con-
tact reliability may be reduced due to
oxidation of the contact points.
Because accidents may result from the
impaired conductivity, always imple-
ment a check beforehand.
4) Prolonged continuous use of the
switch hastens deterioration of the
parts (especially the seal rubber) and
may cause a malfunction in the
release. For this reason, always imple-
ment a check beforehand.
5) Usage in the vicinity of either the
switch operating position (O.P.) or the
release position (R.P.) results in unsta-
ble contacts. If using the NC contact
point, set the actuator to return to the
free position (F.P.) Also, is using the
NO contact point, hold the ratings val-
ues down to 70 to 100% for the over-
travel (O.T.)
6) If the actuator is forced beyond its
total travel (T.T.), the internal mecha-
nism may be damaged. Always use
within the T.T.
7) Do not apply unreasonable force to
the actuator, as this may result in dam-
age and impaired movement.
8) The switch, if dropped, may break
due to excessive vibration and impact.
Therefore, please use extra caution
when transporting and installing.
9) Condensation inside the switch may
occur if there are rapid ambient tem-
perature changes when the switch is in
a high temperature and humidity.
Since this occurs easily during marine
transport, be extra cautious of what the
environment will be when shipping.
Condensation is the phenomenon in
which water vapor condenses into
switch-adhering water droplets when
the temperature rapidly drops in a
high-temperature, high-humidity
atmosphere or when the switch is
quickly moved from a low temperature
location to a place of high temperature
and high humidity. It is the cause of
insulation deterioration and of rust.
10) Be careful of freezing in tempera-
tures below 0°C. Freezing is the phe-
nomenon in which moisture adhering
to the switch from condensation or
when in unusually high-humidity envi-
ronments freezes onto the switch
when the temperature drops below the
freezing point. Please extra caution
because freezing can lock moving
parts, cause operational delays, or
interfere with conductivity when there
is ice between the contacts.
11) In low-temperature, low-humidity
conditions, plastic becomes brittle and
the rubber and grease harden, which
may lead to malfunction.
12) Long term storage (including dur-
ing transport) in high temperature or
high humidity environments or where
the atmosphere contains organic or
sulfide gas, will cause sulfide or oxide
membrane to form on the contact sur-
faces. This in turn will cause unstable
or failed contacting that may lead to
functional malfunction. Please verify
the atmosphere when storing and
transporting.
13) Packaging should be designed to
reduce as much as possible the poten-
tial influence of humidity, organic gas,
and sulfide gas, etc.
14) Please avoid sudden changes in
temperature. This is a cause of switch
deformation and encourages the seal
structure to breathe, which may lead to
seal failure and operational malfunc-
tion.
15) If installing a thermoplastic resin
case, the use of a spring washer tight-
ened directly against the case will
cause the case to collapse and
become damaged. Therefore, please
add a flat washer before tightening.
Also, be careful not to install if the
case is being twisted.
16) For the purpose of improving quali-
ty, materials and internal structure may
be changed without notice.
17) When used outdoors (in places
where there is exposure to direct sun-
light or rain such as in multistory car
parks) or in ambient temperature envi-
ronments where ozone is generated,
the influence of these environments
may cause deterioration of the rubber
material. Please consult us if you
intend to use a switch in such environ-
ments.
CAUTIONS FOR USE
PRECAUTIONS RELATING TO THE INSTALLATION ENVIRONMENT
Avoid using in silicon environments
such as organic silicon-based rubber,
solvents, sealants, oil, grease, or
wiring.
11
ExplanationImproved designPoor design
r
IMPROVEMENT EXAMPLES
@
Problem • Dog adjustment is difficult.
Solution • Separate each one until the dog
can be adjusted.
@Problem • The dog axis is too long, and slips
out during operation.
• For this reason, the limit switch
operating position slips.
Solution • Firmly fix the dog plate to the base.
r
@Problem • The detector sinks, applying force
to the limit switch.
• The limit switch O.T. cannot be set.
Solution • Relieve the pressure using an
additional actuator, and the O.T.
can also be set.
r
@Problem • The area around the actuator coil
is easily damaged.
• Friction generated during opera-
tion.
Solution • Relieve the friction by installing an
additional actuator.
• Change the type of limit switch.
r
@Problem • Workers keep bumping the actua-
tor.
Solution • Fit a protective cover to the side of
the limit switch.
r
@Problem • Because the cord vent for the limit
switch faces upwards, water droplets
and so forth can easily penetrate the
interior.
• The cord is constantly moving and
thus easily damaged.
Solution • Fix the limit switch position on the
stationary board.
• Fit a protective cover, so that water
and oil cannot come into direct con-
tact with the limit switch.
r
@Problem • The cord is not fixed, and gets
pulled during work.
• Dog adjustment is ineffective.
Solution • Change the limit switch position,
and fix the cord.
• Attach an adjustment mechanism
to the dog.
r
@Problem • The limit switch is near a high-tem-
perature area.
• Dog adjustment is ineffective, and
the dog keeps bumping the lever.
Solution • Move the limit switch further away.
• Make dog adjustment possible,
and change the shape of the unit.
r
Dog axle
Conveyer
Printer
Detector
Conveyer
Detector
Rotation axle
Rotation axle
Limit
Protective cover
High temperature
High temperature
12
ExplanationImproved designPoor design
r
@Problem • The detector is scratched.
•Limit attachment adjustments are
difficult
• The actuator is damaged.
• Specimen transfer is impeded.
Solution • Fix the limit position to behind the
dumper to solve the above prob-
lems.
@Problem • The transfer path of the detector is
not fixed, and it keeps bumping the
actuator.
• The operating position is unstable.
• The actuator is damaged.
Solution • Stabilize the operating position by
fitting an additional actuator.
•
Make limit switch adjustment possible.
r
@Problem • Stroke adjustment ineffective.
• Release the limit switch position,
and ensure that the dog does not
bump the lever.
Solution • Make dog adjustment possible.
• Change the limit switch position,
and sure that the dog does not
bump the lever.
r
@Problem • The cam shape is unsuitable
(especially during release and
strike release.)
• Direction of limit switch attachment
is unsuitable.
Solution • Render the cam shape smooth.
• Change the limit switch position.
r
Conveyer
Detector Dumper
Conveyer
Detector
Conveyer
Detector
Rotation axle
Dog
IMPROVEMENT EXAMPLES
Table of Recommended Substitute Products for Discontinued Products
77
ML (AZ7) Limit switches
ML (AZ7) Limit switches
ML (AZ7) Limit switches
ML (AZ7) Limit switches
AZ2 series Limit switches
Slitted type Limit switches (AZ6)
New slitted type Limit switches (AZ66)
AZ1 series Limit switches
PageRecommended substitute productsProducts to be discontinued
P.33
P.33
P.33
P.33
You cannot use this nut
for panel installation.
Products to be discontinued Recommended substitute products Installation
Please note that installation method and
operation characteristics are different.
AZ1∗∗∗ AZ7∗∗∗
AZ7∗∗∗
AZ7∗∗∗
AZ7∗∗∗
AZ2∗∗∗
AZ6∗∗∗
AZ66∗∗∗
Please note that installation method and
operation characteristics are different.
Please note that installation method and
operation characteristics are different.
Please note that installation method and
operation characteristics are different.
78
FOREIGN STANDARDS OVERVIEW
1. International Standards
IEC standard
International Electrotechnical Commission
By promoting international cooperation toward all
problems and related issues regarding
standardization in the electrical and electronic
technology fields, the IEC, a non-governmental
organization, was started in October, 1908, for the
purpose of realizing mutual understanding on an
international level. To this end, the IEC standard
was enacted for the purpose of promoting
international standardization.
2. North America
UL (Underwiters Laboratories Inc.)
This is a non-profit testing organization formed in
1894 by a coalition of U.S. fire insurance firms,
which tests and approves industrial products
(finished products). When electrical products are
marketed in the U.S., UL approval is mandated in
many states, by state law and city ordinances. In
order to obtain UL approval, the principal parts
contained in industrial products must also be UL-
approved parts.
UL approval is divided into two general types. One
is called “listing” (Fig. 1), and applies to industrial
products (finished products). Under this type of
approval, products must be approved
unconditionally. The other type is called
“recognition” (Fig. 2), and is a conditional approval
which applies to parts and materials.
CSA (Canadian Standards Association)
This was established in 1919 as a non-profit, non-
governmental organization aimed at promoting
standards. It sets standards for industrial products,
parts, and materials, and has the authority to judge
electrical products to determine whether they
conform to those standards. The CSA is the ultimate
authority in the eyes of both the government and the
people in terms of credibility and respect. Almost all
states and provinces in Canada require CSA
approval by law, in order to sell electrical products.
As a result, electrical products exported from Japan
to Canada are not approved under Canadian laws
unless they have received CSA approval and
display the CSA mark. Approval is called
“certification”, and products and parts which have
been approved are called “certified equipment”, and
display the mark shown in Fig. 3. The mark shown
in Fig. 4 is called the “Component Acceptance”
mark, and indicates conditional approval which is
applicable to parts. The C-UL mark shown in Fig. 5
(finished products) and Fig. 6 (parts) indicates that
the product has been tested and approved in UL
laboratories, based on UL and CSA standards,
through mutual approval activities.
3. Europe
EN standard
European Standards/Norme Europeennee
(France)/Europaishe Norm (Germany)
Abbreviation for European Standards. A unified
standard enacted by CEN/CENELEC (European
Standards Committee/European Electrical
Standards Committee). EU and EFTA member
nations employ the content of the EN standards into
their own national standards and are obligated to
abolish those national standards that do not agree
with the EN standards.
(1) Germany
VDE (Verband Deutscher Elektrotechniker)
The VDE laboratory was established mainly by the
German Electric Technology Alliance, which was
formed in 1893. It carries out safety experiments
and passes approval for electrical devices and
parts. Although VDE certification is not enforced
under German law, punishment is severe should
electrical shock or fire occur; therefore, it is, in fact,
like an enforcement.
TÜV (Technischer Überwachungs-Verein)
TÜV is a civilian, non-profit, independent
organization that has its roots in the German Boiler
Surveillance Association, which was started in 1875
for the purpose of preventing boiler accidents. A
major characteristic of TÜV is that it exists as a
combination of 14 independent organizations (TÜV
Rheinland, TÜV Bayern, etc.) throughout Germany.
TÜV carries out inspection on a wide variety of
industrial devices and equipment, and has been
entrusted to handle electrical products, as well, by
the government. TÜV inspection and certification is
based mainly on the VDE standard.
TÜV certification can be obtained from any of the 14
TÜVs throughout Germany and has the same
effectiveness as obtaining VDE certification.
LISTING MARK
Fig. 1
RECOGNITION MARK
Fig. 2
Certification
Fig. 3
Fig. 5
Fig. 6
Component Acceptance
Fig. 4
VDE
TÜV Rheinland
79
Limit switches
Product name
SL limit switches
UL recognized
File No. Approved ratings File No. Approved ratings File No. Approved ratings
E122222 4A 250V AC LR55880 4A 250V AC – –
HL limit
switches
ML limit
switches
Dies-cast case standard load type
E122222
E122222
5A 250V AC
Pilot duty B300
LR55880
E122222
(C-UL)
5A 250V AC
Pilot duty B300 J9650514
J9650515
J9551204
DC-12 1A 30V-
Die-cast case low level load type
(includes connector type) 0.1A 30V DC 0.1A 30V DC DC-12 0.1A 30V-
Plastic case standard load type 5A 250V AC
Pilot duty B300 5A 250V AC
Pilot duty B300 AC-15 2A 250V~
DC-12 1A 30V-
Plastic case low level load type 0.1A 30V DC 0.1A 30V DC DC-12 0.1A 30V-
Standard type 10A 250V AC 10A 250V AC AC-15 2A 250V~
–––
Epoxy-sealed terminal type – – –
–––
With lamp – – –
QL limit switches E122222 LR55880 –5A 250V AC 5A 250V AC –
VL limit
switches
Standard type E122222 E122222
(C-UL)
J9551203
5A 250V AC
Pilot duty B300 5A 250V AC
Pilot duty B300
E122222 E122222
(C-UL)
6A 380V AC
Pilot duty A300 6A 380V AC
Pilot duty A300
AC-15 2A 250V~
With neon lamp ––
DL limit switches J9551205 AC-15 2A 250V~
E99838
E43149
–
E43149
(C-UL)
E43149
(C-UL)
10A 1/2HP 125V AC
6A 1/2HP 250V AC
5A 250V AC
2A 250V AC
–
5A 250V AC
2A 250V AC
Vertical limit switches
Compact
Magnelimit
Standard type
Water-resistant type
–
–
–
–
–
–
E122222 E122222
(C-UL)
5A 250V AC
Pilot duty B300 5A 250V AC
Pilot duty B300
Magnelimit ––
CSA certified TÜV approval
SAFETY STANDARDS RECOGNITION
Limit switches conforming to EN/IEC standards
The limit switches shown below conform to both EN and IEC standards, and may dis-
play the CE markings.
File No.Approving bodySuitable standardProduct name
J9650514/J9650515TÜVEN60947-5-1HL
J9551204TÜVEN60947-5-1ML
J9551203TÜVEN60947-5-1VL
J9551205TÜVEN60947-5-1DL
––EN60947-5-1Magnelimit
Product classification
Limit switches
Note: Refer to the page for each individual product for detailed approval conditions and approved types. Moreover, the HL limit
switch alone does not display the CE mark as standard. If the CE mark is necessary, add (CE) to the end of the part No.
when ordering.
What are EN standards?
An abbreviation of Norme Europeenne
(in French), and called European
Standards in English. Approval is by vote
among the CEN/CENELEC member
countries, and is a unified standards lim-
ited to EU member countries, but the
contents conform to the international
ISO/IEC standards.
If the relevant EN standard does not
exist, it is necessary to obtain approval
based on the relevant IEC standard or, if
the relevant IEC standard does not exist,
the relevant standard from each country,
such as VDE, BS, SEMKO, and so forth.
CE markings and EC
directives
The world’s largest single market, the
European Community (EC) was born on
1 January 1993 (changing its name to
EU in November 1993. It is now always
expressed as EU, apart from EC direc-
tives.) EU member country products
have always had their quality and safety
guaranteed according to the individual
standards of each member country.
However, the standards of each country
being different prevented the free flow of
goods within the EU. For this reason, in
order to eliminate non-tariff barriers due
to these standards, and to maximize the
merits of EU unification, the EC direc-
tives were issued concomitant to the
birth of the EU.
The EN standards were established as
universal EU standards in order to facili-
tate EU directives. These standards
were merged with the international IEC
standards and henceforth reflect the
standards in all countries. Also, the CE
markings show that products conform to
EC directives, and guarantee the free
flow of products within the EC.
Appropriate EC directives
for control equipment
products
The main EC directives that are to do
with machinery and electrical equipment
are the machinery directive, the EMC
directive, the low voltage directive, and
the telecom directive. Although these
directives have already been issued, the
date of their enactment is different for
each one. The machinery directive was 1
January 1995. The EMC directive was 1
January 1996, and the low voltage direc-
tive was enacted from 1 January 1997.
The telecom directive was established by
the separate CTR (Common Technology
references.)
CE MARKINGS OVERVIEW