MINI-BEAM®SM31E/SM31R and SM31EL/SM31RL
Self-contained DC-operated Opposed Mode Sensors
Printed in USA 05/01 P/N 03560 rev. C
• Compact, self-contained opposed mode modulated
infrared sensor pairs for 10-30V 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 ea.)
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
MINI-BEAM Opposed-Mode Emitter (E) and Receiver (R) Models
Models Range Cable* Supply
Voltage Output
Type Excess Gain Beam Pattern
SM31E
SM31R
SM31EQD
SM31RQD
3 m
(10')
2 m (6.5')
2 m (6.5')
4-Pin Euro QD
4-Pin Euro QD
10-30V dc Bipolar
NPN/PNP
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
SM31E & SM31R
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
SM31E & SM31R
Opposed Mode
SM31EL
SM31RL
SM31ELQD
SM31RLQD
30 m
(100')
2 m (6.5')
2 m (6.5')
4-Pin Euro QD
4-Pin Euro QD
10-30V dc Bipolar
NPN/PNP
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
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
SM31EL & SM31RL
Opposed Mode
Infrared, 880 nm
*NOTES:
i) 9 m (30') cables are available by adding suffix W/30to the model number of any cabled sensor (e.g., SM31EL W/30).
ii) A 150 mm (6") long pigtail cable with attached QD connector is available by adding suffix QDPto the model number of any
MINI-BEAM sensor (e.g., SM31ELQDP). See page 5 for more information.
iii) A model with a QD connector requires an accessory mating cable. See page 8 for more information.
iv) Emitters and receivers may be ordered with 0.3 millisecond on/off response by adding suffix MHSto the model numbers
(e.g., SM31EMHS & SM31RMHS). This modification reduces sensing range (and excess gain).
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
page 2Banner Engineering Corp. Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
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) 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 should be “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.
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.
15 Turn
Gain
Adjustment
and Light/Dark
Operate Switch*
Gasketed
Acrylic Cover
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
Receiver
Up
Down
Left Right
Emitter Receiver
Opposed Mode Alignment
Move receiver to obtain the
fastest LED pulse rate.
* 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)
page 3
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
Banner Engineering Corp. Minneapolis, U.S.A.
www.bannerengineering.com Tel: 763.544.3164
NOTE: DC MINI-BEAMs may be ordered with 0.3 millisecond on/off response by adding suffix MHS to the model numbers
(e.g. - SM31EMHS & SM31RMHS). This modification reduces sensing range (and excess gain).
MINI-BEAM DC Sensor Specifications
Certifications
Supply Voltage and Current 10 to 30V 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 150mA maximum each output at 25°C, derated to 100 mA at 70°C (derate 1 mA per °C)
Off-state leakage current less than 1 microamp
Output saturation voltage (PNP output) less than 1 volt at 10 mA and less than 2 volts at 150 mA
Output saturation voltage (NPN output) less than 200 millivolts at 10 mA and less than 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.)
NOTE: DC MINI-BEAMs may be ordered with 0.3 millisecond on/off response by adding 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') or 9 m (30') cables, or 4-pin Euro-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 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.
MINI-BEAM Dimensions
MINI-BEAM DC Sensor with Integral Cable MINI-BEAM DC Sensor with Quick-Disconnect
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
page 4Banner Engineering Corp. Minneapolis, U.S.A.
www.bannerengineering.com Tel: 763.544.3164
MINI-BEAM DC Hookup Diagrams
Receivers with Attached Cable Receivers with Quick Disconnect
(4-Pin Euro-Style)
bn
wh
bu +
bk Load
Load
10-30V dc
bn
wh
bu +
bk Load
Load
10-30V dc
Emitters with Attached Cable Emitter with Quick Disconnect
(4-Pin Euro-Style)
Quick Disconnect (QD) Option
DC MINI-BEAM sensors are sold with either a 2 m (6.5') or
a 9 m (30') attached PVC-covered cable, or with a 4-pin
Euro-style QD cable fitting.
DC QD sensors are identified by the letters QD in their
model number suffix. For more information on mating QD
cables, see page 8.
4-Pin Euro-Style Pin-out
(Cable Connector Shown)
White Wire
Blue Wire
Black Wire
Brown 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)
53.3 mm (2.10 in) 27.4 mm (1.08 in)
30.7 mm
(1.21 in)24.1 mm
(0.95 in)
2 m (6.5 ft) Cable
19.1 mm (0.75 in)
M12 x 1 Thread
Quick Disconnect
20.0 mm
(0.79 in)
bn
bu
+
10-30V dc
bn
wh
bu +
bk
10-30V dc
page 5
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
Banner Engineering Corp. Minneapolis, U.S.A.
www.bannerengineering.com Tel: 763.544.3164
MINI-BEAM Modifications
Description
All MINI-BEAM sensors may be ordered with an integral 9 m (30')
cable in place of the standard 2 m (6.5') cable
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, operating temperature range becomes -20º to +50ºC(-4º to +122ºF)
Model Suffix Modification
MHS
Example of Model
Number
W/30 9 meter (30') cable
Modified for High
Speed
SM31E W/30
SM31EMHS
NOTE: Emitter and receiver
must both have MHS
modification
All MINI-BEAMs may be built
with a 150 mm (6") long
integral cable which is
terminated with the
appropriate QD connector.
QDP Pigtail Quick
Disconnect SM31EQDP
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
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") diameter, circular
1.0 mm (0.04") diameter, circular
2.5 mm (0.10") diameter, circular
0.5 x 6.4 mm (0.02" x 0.25"), horizontal slotted
1.0 x 6.4 mm (0.04" x 0.25"), horizontal slotted
2.5 x 6.4 mm (0.10" x 0.25"), horizontal slotted
5.1 x 6.4 mm (0.20" x 0.25"), horizontal slotted
0.5 x 12.7 mm (0.02" x 0.50"), vertical slotted
1.0 x 12.7 mm (0.04" x 0.50"), vertical slotted
2.5 x 12.7 mm (0.10" x 0.50"), vertical slotted
5.1 x 12.7 mm (0.20" x 0.50"), vertical slotted
Kit containing two of each aperture
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 the direction of the scan
Model Description
RAR-
300SM
Side mount reflector
Profile dimension of 14 mm (0.56") in
the direction of the scan
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
page 6Banner Engineering Corp. Minneapolis, U.S.A.
www.bannerengineering.com Tel: 763.544.3164
Mounting Brackets
SMB312PD Stainless steel 18 mm barrel-
mounting bracket
Model Description
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)
SMB46L 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)
page 7
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
Banner Engineering Corp. Minneapolis, U.S.A.
www.bannerengineering.com Tel: 763.544.3164
Mounting Brackets
SMB46S
Model Description Dimensions
S bracket
14 ga 316 stainless steel
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)
SMB46U U 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)
SMB18C
18 mm split clamp black
thermoplastic polyester
bracket
Stainless steel mounting
hardware included
36.0 mm
(1.42")
50.8 mm
(2.00")
42.0 mm
(1.65") 22.9 mm
(0.9")
25.4 mm
(1.00")
10.6 mm
(0.42")
M18 x 1
internal
thread
SMB18SF
18 mm swivel bracket
Black thermoplastic polyester
Includes stainless steel swivel
locking hardware
MINI-BEAM®Sensors
SM31E/SM31R and SM31EL/SM31RL
Euro-Style Quick-Disconnect Cables
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 +90°C (-40°to +194°F)
Voltage Rating: 250V ac/300V dc
4-Pin
Straight
MQDC-406
MQDC-415
MQDC-430
2 m (6.5')
5 m (15')
9 m (30')
Style
4-Pin
Right-angle
MQDC-406RA
MQDC-415RA
MQDC-430RA
2 m (6.5')
5 m (15')
9 m (30')
White Wire
Blue Wire
Black Wire
Brown Wire
Model Length Dimensions: Pin-out
M12 x 1
ø15 mm
(0.6 in)
44 mm max.
(1.7 in)
38 mm max.
(1.5 in)
M12 x 1
ø15 mm
(0.6 in)
38 mm max.
(1.5 in)
MINI-BEAM dc receivers
The following cables are available for extending the length of existing sensor cable. These are 30 m (100') lengths of MINI-BEAM cable. This
cable may be spliced to existing cable. Connectors, if used, must be customer-supplied.
Model Type Used with:
EC312-100 4-conductor
Extension Cables (without connectors)
MINI-BEAM emittersEC312A-100 2-conductor
Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN 55441 Phone: 763.544.3164 www.bannerengineering.com Email: sensors@bannerengineering.com
WARRANTY: Banner Engineering Corp. warrants its products to be free from defects for one year. Banner Engineering Corp. 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.
WARNING . . . Not To Be Used for Personnel Protection
Never use this product as a sensing device for personnel protection. Doing so could lead to serious injury or death.
This product does NOT include the self-checking redundant circuitry necessar y to allow its use in personnel safety applications. A
sensor failure or malfunction can cause either an energized or de-energized sensor output condition. Consult your current Banner Safety Products
catalog for safety products which meet OSHA, ANSI and IEC standards for personnel protection.
!