Datasheet
• Compact, self-contained opposed mode modulated infrared sensor pairs for 10 to
30 V dc 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, 1
millisecond response
• Both sourcing and sinking outputs (150 mA maximum each)
• Receivers include Banner’s exclusive AID™ alignment system, US patent number
4356393
• Rugged, epoxy-encapsulated construction: meets NEMA standards 1, 2, 3, 3S, 4,
4X, 6, 12, and 13, IEC IP67
• Physically and electrically interchangeable with 18 mm barrel-type photoelectrics
WARNING: Not To Be Used for Personnel Protection
Never use this device as a sensing device for personnel protection. Doing so could lead to
serious injury or death. This device does not include the self-checking redundant circuitry necessary
to allow its use in personnel safety applications. A sensor failure or malfunction can cause either an
energized or de-energized sensor output condition.
Models 1 2Range Cable Excess Gain Beam Pattern
SM31E (Emitter)
3 m (10 ft)
2 m (6.5 ft)
1
10
100
.10 m
.33 ft
1.0 m
3.3 ft
10 m
33 ft
.01 m
.033 ft
Distance
1000
Excess Gain
SM31E & SM31R
Opposed Mode
3.0 m
10 ft
2.4 m
8 ft
1.8 m
6 ft
1.2 m
4 ft
0.6 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
SM31E & SM31R
Opposed Mode
SM31R (Receiver)
SM31EQD (Emitter)
4-Pin Euro QD
SM31RQD (Receiver)
SM31EL (Emitter)
30 m (100
ft)
2 m (6.5 ft)
1
10
100
1.0 m
3.3 ft
10 m
33 ft
100 m
330 ft
0.1 m
0.33 ft
1000
Distance
SM31EL & SM31RL
Opposed Mode
Excess Gain
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
SM31EL & SM31RL
Opposed Mode
SM31RL (Receiver)
SM31ELQD (Emitter)
4-Pin Euro QD
SM31RLQD (Receiver)
1To order the 9 m (30 ft) cable models, add the suffix “W/30” to the model number of any cabled sensor (e.g., SM31EL W/30). To
order the 150 mm (6 inch) long pigtail cable with attached QD connector models, add the suffix “QDP” to the model number of
any MINI-BEAM sensor (e.g., SM31ELQDP). Models with a QD connector require an accessory mating cable.
2To order emitters and receivers with 0.3 millisecond on/off response, add the suffix “MHS” to the model numbers (e.g.,
SM31EMHS & SM31RMHS). This modification reduces sensing range (and excess gain).
MINI-BEAM SM31E/R Opposed Mode
Sensors
Original Document
03560 Rev. D 14 April 2014
03560
Installation and Alignment
Proper operation of the sensors requires 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 .
C
A
B
Figure 1. Receiver Adjustments
A - “AID” Indicator LED lights when the sensor sees the reflection of its own
modulated light and pulses at a rate proportional to the strength of the received
light signal
B - 15 turn gain adjustment and light/dark operate switch
C - Gasketed acrylic cover
Regarding the 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) Begin with the emitter mounted securely in place. For
small-parts counting applications, stretch a string between
the emitter and receiver lenses to ensure the sensing beam
passes 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) 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 endpoint
is reached.
If the receiver is “seeing” the emitter’s light beam, the
receiver alignment LED is on. Move the receiver up-down-
right-left (include angular rotation) to obtain the fastest
receiver LED pulse rate. If a pulse is not observable (too
fast to count), reduce the GAIN control (counterclockwise
rotation) to obtain a countable pulse rate of one to five
beats per second. 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.
Object
Emitter
Receiver
Figure 2. Opposed Mode Alignment. Move the receiver to obtain the
fastest LED pulse rate.
3) Repeat the alignment motions after each GAIN reduction. When you have found the receiver orientation that produces
the fastest pulse rate, 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 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.
MINI-BEAM SM31E/R Opposed Mode Sensors
2 www.bannerengineering.com - tel: 763-544-3164 P/N 03560 Rev. D
Wiring Diagrams
Emitters with Attached Cable All Other Models with Attached Cable
bn
bu
+
–
10-30V dc
Emitters with Quick Disconnect (4-pin Euro-Style) All Other Models with Quick Disconnect (4-pin Euro-
Style)
bn
wh
bu
+
–
bk
10-30V dc
bn
wh
bu
+
–
bk Load
Load
10-30V dc
The output type for all models is Bipolar NPN/PNP; load 150 mA max., each output.
Specifications
Supply Voltage and Current
10 to 30 V dc (10% maximum ripple) at less than 25 mA (exclusive of
load)
Supply Protection Circuitry
Protected against reverse polarity and transient voltages
Output Configuration
Bipolar: One current sourcing (PNP) and one current sinking (NPN)
open-collector transistor
Output Rating
150 mA maximum each output at 25 °C, derated to 100 mA at 70 °C
(derate ≈1 mA per °C)
Off-state leakage current: < 1 microamp
Output saturation voltage (PNP output): < 1 volt at 10 mA and < 2
volts at 150 mA
Output saturation voltage (NPN output): < 200 millivolts at 10 mA and
< 1 volt at 150 mA
Output Protection Circuitry
Protected against false pulse on power-up and continuous overload or
short-circuit of outputs
Output Response Time
Sensors will respond to either a “light” or a “dark” signal of 1
millisecond or longer duration, 500 Hz max. 0.3 millisecond response
modification is available. See note below.
(100 millisecond delay on power-up; outputs do not conduct during this
time.)
To order dc MINI-BEAMs with 0.3 millisecond on/off response, add the
suffix “MHS” to the model numbers (e.g, SM31EMHS & SM31RMHS).
This modification reduces sensing range (and excess gain).
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
Exclusive, patented Alignment Indicating Device system (AID™, US
patent #4356393) lights a rear-panel mounted red LED indicator
whenever the sensor sees a “light” condition, with a superimposed
pulse rate proportional to the light signal strength (the stronger the
signal, the faster the pulse rate).
Construction
Reinforced thermoplastic polyester housing, totally encapsulated, o-
ring sealing, acrylic lenses, and stainless steel screws.
Environmental Rating
Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 6, 12, and 13; IEC IP67
Connections
PVC-jacketed 4-conductor 2 m (6.5 ft) or 9 m (30 ft) cables, or 4-pin
Euro-style quick disconnect (QD) fitting are available. QD cables are
ordered separately.
Operating Temperature
Temperature: −20 °C to +70 °C (−4 °F to +158 °F)
Maximum relative humidity: 90% at 50 °C (non-condensing)
Application Notes
The NPN (current sinking) output of dc MINI-BEAM sensors is directly
compatible as an input to Banner logic modules, including all non-
amplified MAXI-AMP and MICRO-AMP modules. MINI-BEAMs are TTL
compatible.
Certifications
MINI-BEAM SM31E/R Opposed Mode Sensors
P/N 03560 Rev. D www.bannerengineering.com - tel: 763-544-3164 3
MINI-BEAM Model Modifications
Model Suffix Modification Description Example of Model Number
W/30 9 meter (30 ft) cable 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 SM31E W/30
MHS Modified for High
Speed
Standard dc MINI-BEAM sensors with 1 millisecond output
response may be modified for 0.3 millisecond (300 μs)
response.
NOTE: Faster response comes at the expense of lower
excess gain. Also, the operating temperature range becomes
−20 °C to +50 °C (−4 °F to +122 °F)
SM31EMHS
NOTE: Emitter and receiver
must both have MHS
modification
QDP Pigtail Quick
Disconnect All MINI-BEAMs may be built with a 150 mm (6 inch) long
integral cable terminated with the appropriate QD connector. SM31EQDP
Dimensions
MINI-BEAM with Integral Cable MINI-BEAM with Quick Disconnect
3.2 mm (0.13”) 12.2 mm (0.48”)
3 mm dia Clearance (2)
M18 × 1 × 15 mm Thread
(Mounting nut supplied)
27.4 mm (1.08”)
53.3 mm (2.10”)
19.1 mm (0.75”)
Mounting peg
(6.3 mm dia × 2.5 mm)
2 m (6.5’) Cable
30.7 mm
(1.21”)
24.1 mm
(0.95”)
20.0 mm
(0.79”)
12 mm Thread
Quick-disconnect
Accessories
Replacement Lens Assemblies
UC-300E
• Replacement lens for the E/R models
UC-300EL
• Replacement lens for the EL/RL models
• Or extends the range of the E/R models
MINI-BEAM SM31E/R Opposed Mode Sensors
4 www.bannerengineering.com - tel: 763-544-3164 P/N 03560 Rev. D
Right-Angle Reflectors
RAR-300SM
• Side mount reflector
• Profile dimension of 14 mm (0.56 inches) in the direction
of the scan
RAR-300FM
• Front mount reflector that attaches directly to the
threaded barrel of most MINI-BEAMs
• Profile dimension of 34 mm (1.35 inches) in the direction
of the scan
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
Circular
AP31-020 0.5 mm dia.
AP31-040 1.0 mm dia.
AP31-100 2.5 mm dia.
Horizontal Slot
AP31-020H 0.5 x 6.4 mm
AP31-040H 1.0 x 6.4 mm
AP31-100H 2.5 x 6.4 mm
AP31-200H 5.1 x 6.4 mm
Vertical Slot
AP31-020V 0.5 x 12.7 mm
AP31-040V 1.0 x 12.7 mm
AP31-100V 2.5 x 12.7 mm
AP31-200V 5.1 x 12.7 mm
Kit
AP31-DVHX2 2 of each aperture
Brackets
SMB312S
• Stainless steel 2-
axis, side-mount
bracket
46
B
C
A
32 20
A = 4.3 x 7.5, B = diam. 3,
C = 3 x 15.3
SMB312B
• Stainless steel 2-
axis, bottom-mount
bracket
• Includes mounting
foot
51
24
23
BC
A
A = diam. 6.9, B = 4.3 x
10.5, C = 3.1 x 15.2
MINI-BEAM SM31E/R Opposed Mode Sensors
P/N 03560 Rev. D www.bannerengineering.com - tel: 763-544-3164 5
SMB312PD
• Right-angle
mounting bracket
with a curved slot
for versatile
orientation
• 12-ga. stainless
steel
• 18 mm sensor
mounting hole
• Clearance for M4
(#8) hardware
46
41
B
C
A
32
Hole center spacing: A to B = 24.2
Hole size: A = ø 4.6, B = 17 × 4.6, C = ø 18.5
NOTE: Not for use with plastic fiber
optic sensors
SMB46L
• Right-angle
• L bracket
• 14-ga. 316
stainless steel
65
54
27 A
Hole center spacing: A = 16.0
Hole size: A = 16.5 x 18.7
SMB46S
• Right-angle
• S bracket
• 14-ga. 316
stainless steel
54
43 65 16
AB
Hole center spacing: A = 16.0
Hole size: A = 16.5 x 18.7, B = 34.0 x 10.0
SMB46U
• Right-angle
• U bracket for
sensor protection
• 14-ga. 316
stainless steel
70
54
65
16
A
B
Hole center spacing: A = 16.0
Hole size: A = 16.5 x 18.7, B = 34.0 x 13.0
SMB18C
• 18 mm split clamp,
black thermoplastic
polyester
• Stainless steel
mounting hardware
included
45
40
13
A
B
A = ø 3 mm (2)
Hole size: B = ø 18 mm
SMB18SF
• 18 mm swivel bracket
with M18 × 1 internal
thread
• Black thermoplastic
polyester
• Stainless steel swivel
locking hardware
included
B
A
51
42
25
Hole center spacing: A = 36.0
Hole size: A = ø 5.3, B = ø 18.0
MINI-BEAM SM31E/R Opposed Mode Sensors
6 www.bannerengineering.com - tel: 763-544-3164 P/N 03560 Rev. D
Euro-Style Quick-Disconnect Cables
4-Pin Threaded M12/Euro-Style Cordsets
Model Length Style Dimensions Pinout
MQDC-406 1.83 m (6 ft)
Straight
44 Typ.
ø 14.5
M12 x 1
2
3
4
1
1 = Brown
2 = White
3 = Blue
4 = Black
MQDC-415 4.57 m (15 ft)
MQDC-430 9.14 m (30 ft)
MQDC-450 15.2 m (50 ft)
MQDC-406RA 1.83 m (6 ft)
Right-Angle
32 Typ.
[1.26"]
30 Typ.
[1.18"]
ø 14.5 [0.57"]
M12 x 1
MQDC-415RA 4.57 m (15 ft)
MQDC-430RA 9.14 m (30 ft)
MQDC-450RA 15.2 m (50 ft)
Extension Cables
The following cables are available for extending the length of existing sensor cable. These are 30 m (100 ft) lengths of
MINI-BEAM cable, which may be spliced to the existing cable. Connectors, if used, must be customer-supplied.
Model Type Used With
EC312-100 4-conductor MINI-BEAM dc receivers
EC312A-100 2-conductor MINI-BEAM emitters
Banner Engineering Corp Limited Warranty
Banner Engineering Corp. warrants its products to be free from defects in material and workmanship for one year following
the date of shipment. Banner Engineering Corp. will repair or replace, free of charge, any product of its manufacture
which, at the time it is returned to the factory, is found to have been defective during the warranty period. This warranty
does not cover damage or liability for misuse, abuse, or the improper application or installation of the Banner product.
THIS LIMITED WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER EXPRESS OR
IMPLIED (INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE), AND WHETHER ARISING UNDER COURSE OF PERFORMANCE, COURSE OF DEALING OR
TRADE USAGE.
This Warranty is exclusive and limited to repair or, at the discretion of Banner Engineering Corp., replacement. IN NO
EVENT SHALL BANNER ENGINEERING CORP. BE LIABLE TO BUYER OR ANY OTHER PERSON OR ENTITY FOR
ANY EXTRA COSTS, EXPENSES, LOSSES, LOSS OF PROFITS, OR ANY INCIDENTAL, CONSEQUENTIAL OR
SPECIAL DAMAGES RESULTING FROM ANY PRODUCT DEFECT OR FROM THE USE OR INABILITY TO USE THE
PRODUCT, WHETHER ARISING IN CONTRACT OR WARRANTY, STATUTE, TORT, STRICT LIABILITY,
NEGLIGENCE, OR OTHERWISE.
Banner Engineering Corp. reserves the right to change, modify or improve the design of the product without assuming any
obligations or liabilities relating to any product previously manufactured by Banner Engineering Corp.
MINI-BEAM SM31E/R Opposed Mode Sensors
www.bannerengineering.com - tel: 763-544-3164