MINI-BEAM®
SMA31E/SM2A31R and SMA31EL/SM2A31RL
Self-contained AC-operated Opposed Mode Sensors
Printed in USA P/N 03561L7B
• Compact, self-contained opposed mode modulated
infrared sensor pairs for 24-240V ac operation
• Standard sensor pairs have 3 m (10 ft) range
• Long range sensor pairs have 30 m (100 ft) range
• Switch-selectable for light operate or dark operate; Highly
repeatable, 2 millisecond response “on”/1 millisecond
“off” response
• SPST solid state SCR output switches up to 300mA; low
leakage current and saturation voltage
• Rugged, epoxy-encapsulated construction: meets NEMA
standards 1, 2, 3, 3S, 4, 4X, 12 and 13; IEC IP67
• Physically and electrically interchangeable with 18 mm
barrel-type photoelectrics
MINI-BEAM Opposed Mode Emitter (E) and Receiver (R)
Models Range Cable Supply
Voltage Output
Type Excess Gain Beam Pattern
SMA31E
SM2A31R
SMA31EQD
SM2A31RQD
3 m
(10 ft)
2 m (6.5 ft)
2 m (6.5 ft)
3-Pin Micro QD
3-Pin Micro QD
24-240V ac SPST
Solid-state
2-Wire
1
10
100
.10 m
.33 ft 1.0 m
3.3 ft 10 m
33 ft
.01 m
.033 ft
E
X
C
E
S
S
G
A
I
N
DISTANCE
1000
SMA31E & SM2A31R
Opposed Mode
3.0 m
10 ft
2.4 m
8 ft
1.8 m
6 ft
1.2 m
4 ft
.6 m
2 ft
0
0
100 mm
200 mm
300 mm
100 mm
200 mm
300 mm
0
4.0 in
8.0 in
12.0 in
4.0 in
8.0 in
12.0 in
DISTANCE
SMA31E & SM2A31R
Opposed Mode
SMA31EL
SM2A31RL
SMA31ELQD
SM2A31RLQD
30 m
(100 ft)
2 m (6.5 ft)
2 m (6.5 ft)
3-Pin Micro QD
3-Pin Micro QD
24-240V ac SPST
Solid-state
2-Wire
30 m
100ft
24 m
80 ft
18 m
60 ft
12 m
40 ft
6 m
20 ft
0
0
250 mm
500 mm
750 mm
250 mm
500 mm
750 mm
0
10.0 in
20.0 in
30.0 in
10.0 in
20.0 in
30.0 in
DISTANCE
SMA31EL & SM2A31RL
Opposed Mode
1
10
100
1.0 m
3.3 ft 10 m
33 ft 100 m
330 ft
.1 m
.33 ft
1000
E
X
C
E
S
S
G
A
I
N
DISTANCE
SMA31EL &
SM2A31RL
Opposed Mode
Infrared, 880 nm
For Standard MINI-BEAMs:
i) 9 m (30 ft) cables are available by adding suffix “W/30” to the model number of any cabled sensor (e.g. - SMA31EL W/30).
ii) A 150 mm (6 in.) long pigtail cable with attached QD connector is available by adding suffix “QDP” to the model number of any
MINI-BEAM sensor (e.g. - SMA31ELQDP). See page 5 for more information.
iii) A model with a QD connector requires an accessory mating cable. See page 8 for more information.
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
page 2
MINI-BEAM Installation and Alignment
Proper operation of the sensors requires that they be mounted
securely and aligned properly. Excessive movement or vibration
can cause intermittent or false operation due to loss of
alignment. For maximum mechanical stability, final-mount these
sensors in 18-mm holes by their threaded barrels or use a
mounting bracket (see page 6).
1) Begin with the emitter mounted securely in place. For
small-parts counting applications, stretch a string
between the emitter and receiver lenses to ensure that the
sensing beam will pass through the center of the sensing
location. For less critical applications, the receiver may be
initially positioned by line-of-sight placement. Mount the
receiver, leaving a means for movement.
2)
Set the receiver to light-operate mode.
Apply power to the
emitter and receiver, and advance the receiver’s 15-turn
GAIN control to maximum (clockwise end of rotation).
The GAIN control is clutched at both ends to avoid
damage, and will “free-wheel” when either end point is
reached.
If the receiver is “seeing” the emitter’s light beam, the
receiver alignment LED should be “on”. Move the receiver
up-down-right-left (include angular rotation) to locate the
center of the movement range within which the LED stays
lit. Reducing the GAIN setting will restrict the range of
motion and allow precise positioning. NOTE: to aid
alignment at short ranges, it may help to further reduce
the strength of the light signal by temporarily masking the
emitter and/or receiver lens with tape or a sheet of paper.
3) Repeat the alignment motions after each GAIN reduction.
When you have found the center of the movement range,
mount the receiver solidly in that position. Remove any
masking material, and increase the receiver GAIN to
maximum. Test the system by placing the object to be
detected into the sensing position. The receiver LED
indicator should go “off”. (If it does, alignment is
complete, and you may now switch the sensor to dark-
operate if the application requires it.) If the LED does
not
go “off”, the cause is probably either “flooding” or “burn-
through”.
Flooding
occurs when a portion of the effective beam
passes
around
the object to be sensed and activates the
receiver. Check that the object completely breaks the
beam, and that the beam is centered on the object. Add
apertures, if necessary, to tailor the effective beam to the
size or profile of the object being sensed.
Burn-through
refers to a portion of the emitter’s light energy passing
through
a thin or translucent object and activating the
receiver. Try sensing at a reduced GAIN setting or
consider an alternative sensing scheme.
15 Turn
Gain
Adjustment
and Light/Dark
Operate Switch*
Gasketed
Acrylic Cover
Red LED lights when the
sensor's output is conducting.
Receiver
Up
Down
Left Right
Emitter Receiver
Opposed Mode Alignment
* Note regarding Light/Dark operate switch:
• Turn switch
fully
clockwise for light operate (sensor
outputs conduct when object is absent)
• Turn switch
fully
counterclockwise for dark operate
(sensor outputs conduct when object is present and
blocking light beam)
page 3
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
MINI-BEAM AC Product Specifications
Certifications
Supply Voltage and Current 24 to 240V ac (50/60 Hz), 250V ac max
Supply Protection Circuitry Protected against transient voltages
Output Configuration SPST SCR solid-state relay with either normally closed or normally open contact (light/dark operate
selectable); 2-wire hookup
Output Rating Minimum load current 5 mA; maximum steady-state load capability 300 mA to 50°C ambient (122°F)
100 mA to 70°C ambient (158°F)
Inrush capability 3 amps for 1 second (non-repetitive); 10 amps for 1 cycle (non-repetitive)
Off-state leakage current less than 1.7 mA rms
On-state voltage drop ≤5 volts at 300 mA load, ≤10 volts at 15 mA load
Output Protection Circuitry Protected against false pulse on power-up
Output Response Time 2 millisecond on and 1 millisecond off
Repeatability 0.3 milliseconds
Adjustments LIGHT/DARK OPERATE select switch, and 15-turn slotted brass screw GAIN (sensitivity) adjustment
potentiometer (clutched at both ends of travel). Both controls are located on rear panel of sensor and
protected by a gasketed, clear acrylic cover.
Indicators Red indicator LED on rear of sensor is “ON” when the load is energized
Construction Reinforced VALOX®housing, totally encapsulated, o-ring sealing, acrylic lenses, and stainless steel screws
Environmental Rating Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 12, and 13; IEC IP67
Connections PVC-jacketed 2-conductor 2 m (6.5ft) or 9 m (30ft) cables, or 3-pin micro-style quick disconnect (QD)
fitting are available. QD cables are ordered separately. See page 8.
Operating Temperature Temperature: -20° to +70°C (-4° to +158°F)
Maximum Relative Humidity: 90% at 50°C (non-condensing)
Application Notes i) ac MINI-BEAMs may be destroyed from overload conditions
ii) Use on low voltage requires careful analysis of the load to determine if the leakage current or on-state
voltage of the sensor will interfere with proper operation of the load
iii) The false-pulse protection feature may cause momentar y drop-out of the load when the sensor is
wired in series or parallel with mechanical switch contacts
VALOX®is a registered trademark of General Electric Company
MINI-BEAM Dimension Information
MINI-BEAM AC Sensor with Integral Cable MINI-BEAM AC Sensor with Quick-Disconnect
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
page 4
MINI-BEAM AC Hookup Diagrams
Receivers with Attached Cable Receivers with Quick Disconnect
(3-Pin Micro-Style)
bn
bu Load
24-240V ac
rd/bk
gn
rd/wh Load 24-240V ac
Emitters with Attached Cable Emitters with Quick Disconnect
(3-Pin Micro-Style)
bn
bu 24-240V ac
rd/bk
gn
rd/wh 24-240V ac
Quick Disconnect (QD) Option
AC MINI-BEAM sensors are sold with either a 2 m (6.5 ft)
or a 9 m (30 ft) attached PVC-covered cable, or with a 3-pin
micro-style QD cable fitting.
AC QD sensors are identified by the letters “QD” in their
model number suffix. For more information on mating QD
cables, see page 8.
3-Pin Micro-Style Pin-out
(Cable Connector Shown)
Green Wire
Red/Black
Wire
Red/White
Wire
12.2 mm (0.48 in)
Mounting Peg
(ø 6.3 mm x 2.5 mm)
ø 3 mm Clearance (2)
M18 x 1 x 15 mm Thread
(Mounting Nut Supplied)
3.2 mm
(0.13 in)
27.4 mm (1.08 in)
30.7 mm
(1.21 in)
24.1 mm
(0.95 in)
19.1 mm
(0.75 in)
66.0 mm
(2.60 in)
2 m (6.5 ft) Cable
1/2-20 UNF Thread
Quick Disconnect
20.0 mm
(0.79 in)
page 5
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
MINI-BEAM MODIFICATIONS
Description
All MINI-BEAM sensors may be ordered with an integral 9 m (30 ft)
cable in place of the standard 2 m (6.5 ft) cable
Model Suffix Modification Example of Model
Number
W/30 9 meter (30 ft) cable SM2A31R W/30
All MINI-BEAMs may be built
with a 150 mm (6 in) long
integral cable which is
terminated with the
appropriate QD connector.
QDP Pigtail Quick
Disconnect SM2A31RQDP
Apertures
Opposed mode MINI-BEAM sensors may be fitted with apertures which narrow or shape the effective beam of the sensor to more closely match
the size or profile of the object to be sensed. A common example is the use of “line” or “slit” type aperture when wire or thread is be sensed.
Each model contains 20 apertures.
Model Description
AP31-020
AP31-040
AP31-100
AP31-020H
AP31-040H
AP31-100H
AP31-200H
AP31-020V
AP31-040V
AP31-100V
AP31-200V
AP31-DVHX2
0.5 mm (0.02 in) diameter, circular
1.0 mm (0.04 in) diameter, circular
2.5 mm (0.10 in) diameter, circular
0.5 x 6.4 mm (0.02 x 0.25 in), horizontal slotted
1.0 x 6.4 mm (0.04 x 0.25 in), horizontal slotted
2.5 x 6.4 mm (0.10 x 0.25 in), horizontal slotted
5.1 x 6.4 mm (0.20 x 0.25 in), horizontal slotted
0.5 x 12.7 mm (0.02 x 0.50 in), vertical slotted
1.0 x 12.7 mm (0.04 x 0.50 in), vertical slotted
2.5 x 12.7 mm (0.10 x 0.50 in), vertical slotted
5.1 x 12.7 mm (0.20 x 0.50 in), vertical slotted
Kit containing two of each aperture
Replacement Lens Assemblies
MINI-BEAM lens assemblies are field-replaceable.
Model Description
UC-300E
UC-300EL
Replacement lens for E/R
Replacement lens for
EL/RL or use for
extending range of E/R
Right-Angle Reflectors
MINI-BEAM right-angle reflectors are useful for tight sensing
locations. NOTE: These reflectors significantly decrease excess gain.
RAR-
300FM
• Front mount reflector that attaches
directly to the threaded barrel of most
MINI-BEAMs
• Profile dimension of 34 mm (1.35 in)
in the direction of the scan
Model Description
RAR-
300SM
• Side mount reflector
• Profile dimension of 14 mm (0.56 in)
in the direction of the scan
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
page 6
Mounting Brackets
SMB46L
SMB312PD Stainless steel 18 mm barrel-
mounting bracket
Model Description
• “L” bracket
• 14 ga 316 stainless steel
C
L
8 mm
(0.3 in) 16 mm
(0.6 in)
65 mm
(2.6 in)
27 mm
(1.1 in)
2 mm
(.1 in)
6 mm
(0.2 in)
5 mm (0.2 in)
(2x)
ø36 mm (1.4 in)
ø6.5 mm (0.26 in) (6x)
15 mm
(0.6 in)
6 mm
(0.2 in)
54 mm
(2.1 in)
SMB312S Stainless steel 2-axis, side
mounting bracket
R 5.1 mm
(0.20 in)
ø 3.05 mm
(0.120 in)
ø 3.05 mm Slot
(0.120 in)
20°
90°
C
L
15°
(2)
R 24.1 mm
(0.95 in)
31.8 mm
(1.25 in)
20.1 mm
(0.79 in)
45.5 mm
(1.79 in)
20.3 mm
(0.80 in)
R 3.1 mm
(0.12 in) (2)
10° (TYP)
4.32 mm
(0.170 in)
Slot (2)
2.5 mm
(0.10 in)
R 5.1 mm
(0.20 in)
ø 4.6 mm
(0.18 in)
ø 4.6 mm Slot
(0.18 in)
20°
90°
C
L
15°
(2)
R 24.1 mm
(0.95 in)
31.8 mm
(1.25 in)
40.6 mm
(1.60 in)
45.5 mm
(1.79 in)
18.42 mm
(0.725 in)
R 3.1 mm
(0.12 in) (2)
15.2 mm
(0.60 in)
2.5 mm
(0.10 in)
SMB312B Stainless steel 2-axis, bottom
mounting bracket
90°
10° (2)
10° (2)
2.5 mm
(0.10 in) 3.1 mm
Slot (2)
(0.12 in)
4.3 mm Slot (2)
(0.17 in)
8.6 mm (2)
(0.34 in)
ø 6.9 mm
(0.27 in)
17.3 mm (2)
(0.68 in)
35.0 mm (2)
(1.38 in)
50.8 mm
(2.00 in)
23.4 mm
(0.92 in)
11.4 mm
(0.45 in)
9.1 mm
(0.36 in)
24.1 mm
(0.95 in)
page 7
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
Mounting Brackets
54 mm
(2.1 in)
C
L
8 mm
(0.3 in) 16 mm
(0.6 in)
17 mm
(0.7 in)
34 mm
(1.3 in)
65 mm
(2.6 in)
27 mm
(1.1 in) 16 mm
(0.6 in)
2 mm
(.1 in)
6 mm
(0.2 in)
10 mm
(0.4 in)
5 mm (0.2 in)
(4x)
ø36 mm (1.4 in)
ø6.5 mm (0.26 in) (6x)
3.5 mm
(0.14 in)
15 mm
(0.6 in)
6 mm
(0.2 in)
65 mm
(2.6 in)
27 mm
(1.1 in)
2 mm
(.1 in)
16 mm
(0.6 in)
70 mm
(2.8 in)
54 mm
(2.1 in)
C
L
8 mm
(0.3 in) 16 mm
(0.6 in)
17 mm
(0.7 in)
34 mm
(1.3 in)
6 mm
(0.2 in)
13 mm
(0.5 in)
5 mm (0.2 in)
(4x)
ø36 mm (1.4 in)
ø6.5 mm (0.26 in) (6x)
3.5 mm
(0.14 in)
15 mm
(0.6 in)
6 mm
(0.2 in)
SMB46S
Model Description Dimensions
SMB46U
• “S” bracket
• 14 ga 316 stainless steel
• “U” bracket
• 14 ga 316 stainless steel
SMB18C
• 18 mm split clamp black
VALOX®bracket
• Stainless steel mounting
hardware included
46.0 mm
(1.81 in)
44.5 mm
(1.75 in)
36.0 mm
(1.42 in)
2.5 mm
(0.10 in)
25.4 mm
(1.00 in)
13.0 mm (0.50 in) Nut Plate
Spacer
(If Required)
M5 x 0.8
x 60 mm
Screw (2)
6.4 mm
(0.25 in)
10.9 mm
(0.43 in)
SMB18S
• 18 mm swivel, black VALOX®
bracket
• Stainless steel mounting
hardware included
Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN 55441 Telephone: (612) 544-3164 FAX (applications) (612) 544-3573
MINI-BEAM®Sensors
SMA31E/SM2A31R and SMA31EL/SM2A31RL
WARNING These photoelectric presence sensors do NOT include the self-checking redundant circuitry
necessary to allow their use in personnel safety applications. A sensor failure or malfunction can result in either
an energized or a de-energized sensor output condition.
Never use these products as sensing devices for personnel protection. Their use as a safety device may create
an unsafe condition which could lead to serious injury or death.
Only MINI-SCREEN®, MULTI-SCREEN®, MICRO-SCREEN™, MACHINE-GUARD™and PERIMETER-GUARD™Systems, and other
systems so designated, are designed to meet OSHA and ANSI machine safety standards for point-of-operation guarding
devices. No other Banner sensors or controls are designed to meet these standards, and they must NOT be used as sensing
devices for personnel protection.
!
WARRANTY: Banner Engineering Corporation warrants it products to be free from defects for one year. Banner Engineering
Corporation will repair or replace, free of charge, any product of its manufacture found to be defective at the time it is returned
to the factory during the warranty period. This warranty does not cover damage or liability for the improper application of
Banner products. This warranty is in lieu of any other warranty either expressed or implied.
EC312A-100 2-conductor All MINI-BEAM ac models
The following cables are available for extending the length of existing sensor cable. These are 30 m (100 ft) lengths of MINI-BEAM cable.
This cable may be spliced to existing cable. Connectors, if used, must be customer-supplied.
Model Type Used with:
Extension Cables (without connectors)
Cable: PVC jacket, polyurethane connector body, nickel-plated brass coupling nut
Conductors: 22 or 20 AWG high-flex stranded, PVC insulation, gold-plated contacts
Temperature: -40 to +80°C (-40 to +176°F)
Voltage Rating: 250V ac/300V dc (3-pin), 125V ac/150V dc (4-pin)
3-Pin
Straight
MQDC-306
MQDC-315
MQDC-330
2 m (6.5 ft)
5 m (15 ft)
9 m (30 ft)
Style
3-Pin
Right-angle
MQDC-306RA
MQDC-315RA
MQDC-330RA
2 m (6.5 ft)
5 m (15 ft)
9 m (30 ft)
Green Wire
Red/Black
Wire
Red/White
Wire
Model Length Dimensions Pin-out
ø1/2-20UNF-2B
ø15 mm
(0.6 in)
44 mm max.
(1.7 in)
38 mm max.
(1.5 in)
1/2-20UNF-2B
ø15 mm
(0.6 in)
38 mm max.
(1.5 in)
Micro-Style Quick Disconnect Cables