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 sensor front, slide the U-shaped retaining clip (supplied with the

sensor) into the slot in the sensor's barrel, until it snaps into place.

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: less than 1 microamp

Output Saturation Voltage (PNP Output): less than 1 V at 10 mA, less than 2

V at 150 mA

Output Saturation Voltage (NPN Output): less than 200 millivolts at 10 mA,

less than 1 V at 150 mA

Environmental Rating

Meets NEMA standards 1, 2, 3, 3S, 4, 4X, 6, 12, and 13; IP67.

Connections

PVC-jacketed 4-conductor 2 m (6.5 ft) or 9 m (30 ft) cables, or 4-pin M12

male QD fitting; QD cables available separately

Operating Conditions

–20 °C to +70 °C (–4 °F to +158 °F)

90% at +50 °C maximum relative humidity (non-condensing)

Application Note

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.

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 “dark” signal of 1 millisecond or

longer duration, 500 Hz maximum. Modification for 0.3 millisecond response

is available (MHS-suffix models; these models also feature reduced

sensitivity range and reduced repeatability.)

Note: Outputs are non-conducting during 100

millisecond delay on power-up.

Repeatability

Opposed: 0.14 milliseconds

Non-Polarized and Polarized Retro, Diffuse, Convergent, Glass Fiber Optic,

and Plastic Fiber Optic: 0.3 milliseconds

Response time and repeatability specifications are independent

of signal strength.

Adjustments

Light/Dark Operate Select switch

15-turn slotted brass screw Gain (sensitivity) adjustment potentiometer

(clutched at both ends of travel)

Located on the rear panel, protected by a gasketed, clear acrylic cover.

Indicators

Patented Alignment Indicator Device system (AID™, US patent #4356393)

lights a rear-panel-mounted LED indicator when the sensor sees light. Its

pulse rate is 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, stainless steel screws

Required Overcurrent Protection

WARNING: Electrical connections must be

made by qualified personnel in accordance with

local and national electrical codes and

regulations.

Overcurrent protection is required to be provided by end product application

per the supplied table.

Overcurrent protection may be provided with external fusing or via Current

Limiting, Class 2 Power Supply.

Supply wiring leads < 24 AWG shall not be spliced.

For additional product support, go to www.bannerengineering.com.

Supply Wiring (AWG)

Required Overcurrent Protection (Amps)

20

5.0

22

3.0

24

2.0

26

1.0

28

0.8

30

0.5

Certifications

Performance Curves for SM31Ex Emitter and SM31Rx Receiver Models

Beam Pattern for SM31E/R

Excess Gain Curve for

SM31E/R

Beam Pattern for SM31EL/RL

Excess Gain Curve for

SM31EL/RL

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

Opposed Mode

SM31E & SM31R

SMA31E & SM2A31R

1

10

100

.10 m

.33 ft

1.0 m

3.3 ft

10 m

33 ft

.01 m

.033 ft

Distance

1000

Opposed Mode

SM31E & SM31R

SMA31E & SM2A31R

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

Opposed Mode

SM31EL & SM31RL

SMA31EL & SM2A31RL

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

Opposed Mode

SM31EL & SM31RL

SMA31EL & SM2A31RL

Effective Beam: 3.5 mm

Effective Beam: 13 mm

MINI-BEAM® DC Voltage Series Sensor

6

www.bannerengineering.com - Tel: + 1 888 373 6767

P/N 69943 Rev. G