MINI-BEAM®
SM2A312F
Self-contained AC-operated Sensors for use with Banner Glass Fiber Optics
Printed in USA P/N 03375L7G
• Compact, modulated, self-contained infrared fiber optic
sensors for 24-240V ac 2-wire operation
• Useable in opposed, retroreflective, and diffuse fiberoptic
modes with Banner glass fiber optic assemblies
• Switch-selectable for light operate or dark operate
• 8 millisecond response
• SPST SCR solid-state output switches up to 300 mA; low
leakage current and saturation voltage
• Rugged, epoxy-encapsulated construction: meets NEMA
standards 1, 2, 3, 3S, 4, 4X, 12 and 13; IEC IP67
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. - SM2A312F 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. - SM2A312FQDP). See page 5 for more information.
iii) A model with a QD connector requires an accessory mating cable. See page 5 for more information.
MINI-BEAM Glass Fiber Optic
SM2A312F
SM2A312FQD
Range
varies by
sensing
mode
and fiber
optics
used
2 m (6.5 ft)
3-Pin Micro QD 24-240V ac SPST
Solid-state
2-wire
Diffuse mode performance based on 90% reflectance white test card
Models Range Cable Supply
Voltage Output
Type Excess Gain Beam Pattern
1
10
100
.1 m
.33 ft 1 m
3.3 ft 10 m
33 ft
.01 m
.033 ft
1000
E
X
C
E
S
S
G
A
I
N
DISTANCE
SM2A312F
Opposed Mode
Glass Fibers
IT23S Fibers
w/L9 lenses
IT23S
Fibers
IT13S
Fibers 500 mm
20 in
400 mm
16 in
300 mm
12 in
200 mm
8 in
100 mm
4 in
0
0
25 mm
50 mm
75 mm
25 mm
50 mm
75 mm
0
1 in
2 in
3 in
1 in
2 in
3 in
DISTANCE
SM2A312F
Opposed Mode
IT13S IT23S
1
10
100
10 mm
.4 in 100 mm
4 in 1000 mm
40 in
1 mm
.04 in
1000
E
X
C
E
S
S
G
A
I
N
DISTANCE
SM2A312F
Diffuse Mode
Glass Fibers
BT23S Fiber
BT13S Fiber 37.5 mm
1.5 in
30 mm
1.2 in
22.5 mm
0.9 in
15 mm
0.6 in
7.5 mm
0.3 in
0
0
0.65 mm
1.3 mm
1.9 mm
0.65 mm
1.3 mm
1.9 mm
0
0.025 in
0.050 in
0.075 in
0.025 in
0.050 in
0.075 in
DISTANCE
SM2A312F
Diffuse Mode
BT23SBT13S
MINI-BEAM®Sensors
SM2A312F
page 2
O-ring
Retaining Clip
MINI-BEAM Features
MINI-BEAM Fiber Information
15 Turn
Gain
Adjustment
and Light/Dark
Operate Switch*
Gasketed
Acrylic Cover
Red LED Lights when the
sensor's output is conducting
*Note regarding Light/Dark operate switch:
• Turn switch
fully
clockwise for light operate (sensor outputs conduct when
sensing light is received)
• Turn switch
fully
counterclockwise for dark operate (sensor outputs conduct when
sensing light is not received)
1) Install the O-ring (supplied with the fiber) on each fiber end, as shown in the
drawing.
2) While pressing the fiber ends firmly into the ports on the front of the sensor,
slide the U-shaped retaining clip (supplied with the sensor) into the slot in the
sensor’s barrel, until it snaps into place.
Focal Length of Lens
Focus 5/16" Threaded
Sensing Tip
Illuminate Opposite End
Lens Housing
End of Fiber Optic Bundle
Lens
Lens Attachment
Lenses are sometimes added to fiber optic assemblies for extending opposed mode sensing range. Banner ofers the following lens
assemblies for use with fiber optic assemblies which have 5/16” -24 threaded sensing tips (e.g. fiber model IT23S):
Model Lens Size Focal Length Housing Notes
L9 12.5 mm (1/2”) 12.5 mm (1/2”) Aluminum Suitable for all but
highly corrosive
environments
L16F 25 mm (1”) 44 mm (1.7”) Delrin
L16FAL 25 mm (1”) 44 mm (1.7”) Aluminum
L16FSS 25 mm (1”) 44 mm (1.7”) Stainless
Steel Suitable for all
environments
Suitable for all but
highly corrosive
environments
Maximum operating
temperature is
100º C (212º F)
Lenses are most efficient when they are located slightly beyond their focal length distance from the sensing end of the fiber optic
bundle. The easiest way to focus a lens is to treat it like a magnifying glass.
Illuminate the fiber optic bundle at the threaded end of the fiber optic assembly by directing the opposite end toward a visible light
source (e.g. - an incandenscent bulb, visible LED, sunlight, etc.). Thread the lens onto the fiber optic assembly until the end of the
fiber optic bundle comes into sharp focus under the lens. Then, back off (unthread) the lens assembly from the point of sharpest
focus by one to three full turns. The illuminated bundle should now appear slightly blurred. This is the optimum setting, and the
lens may be secured in position using one of the jam nuts provided. Refer to the drawing above.
page 3
MINI-BEAM®Sensors
SM2A312F
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 8 milliseconds on and off
“OFF” response time specification does not include load response of up to 1/2ac cycle (8.3 milliseconds).
Response time specification of load should be considered when important.
(NOTE: 300 millisecond delay on power-up.)
Repeatability 2.6 milliseconds; Response time and repeatability specifications are independent of signal strength.
Adjustments LIGHT/DARK OPERATE select switch, and 15-turn slotted brass screw GAIN (sensitivity) adjustment po-
tentiometer (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 5.
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 momentary 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®Sensors
SM2A312F
page 4
MINI-BEAM Dimension Information
MINI-BEAM AC Sensor with Integral Cable MINI-BEAM AC Sensor with Quick-Disconnect
MINI-BEAM AC Hookup Diagrams
1/2-20 UNF Thread
Quick Disconnect
89.0 mm
(3.50 in)
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 19 mm Thread
(Mounting Nut Supplied)
Fiber Optic Fitting
3.2 mm
(0.13 in)
30.7 mm
(1.21 in)
24.1 mm
(0.95 in)
19.1 mm
(0.75 in)
69.9 mm
(2.75 in)
2 m (6.5 ft) Cable
31.2 mm (1.23 in)
AC Sensors with Attached Cable
bn
bu Load
24-240V ac
rd/bk
gn
rd/wh Load 24-240V ac
3-Pin Micro-Style Pin-out
(Cable Connector Shown)
Green Wire
Red/Black
Wire
Red/White
Wire
AC Sensors with Quick Disconnect
(3-Pin Micro-Style)
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 5.
page 5
MINI-BEAM®Sensors
SM2A312F
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 SM2A312F 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 SM2A312FQDP
EC312A-100 2-conductor All MINI-BEAM SM2A312 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)
Micro-Style Quick Disconnect Cables
38 mm max.
(1.5 in)
1/2-20UNF-2B
ø15 mm
(0.6 in)
38 mm max.
(1.5 in)
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)
ø1/2-20UNF-2B
ø15 mm
(0.6 in)
44 mm max.
(1.7 in)
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
MINI-BEAM®Sensors
SM2A312F
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 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
Includes SMB12F (below)
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
SM2A312F
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
40.0 mm
(1.60 in)
42.4 mm
(1.67 in)
30.0 mm
(1.18 in)
2.5 mm
(0.10 in)
21.1 mm
(0.83 in)
Nut Plate
M5 x 0.8
x 60 mm
Screw (2)
13 mm
(0.5 in)
14.0 mm
(0.55 in)
• “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
SM2A312F
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.