Plastic Fiber Optic models are an excellent option for sensing in tight or otherwise inaccessible areas. Fibers withstand

vibration and shock and are immune to electrical noise. Plastic fibers function well at temperatures from –30° to +70° C (–

20° F to +158° F), and stand up to repeated flexing. Most are easy to shorten in the field, for custom installations. Plastic

fibers are not recommended for severe environments (see glass fiber models). Plastic fiber optic sensors are recommended

for color mark sensing.

Status Indicators

Normal sensor operation is called RUN mode. Sensor configuration (setting the sensitivity threshold and selecting output

ON and OFF conditions) is performed in TEACH mode. The two LED indicators (bi-color green/red and amber) have distinct

roles in the two operation modes. If contrast is marginal, the bi-color indicator will flash green to indicate instability. If this

occurs, reconfigure or realign the sensor, or clean the sensor or fiber lenses.

received light signal strength increases (during programming). This feature simplifies accurate alignment during TEACH

mode, and gives a relative indication of sensing contrast between the light and dark conditions.

LED

RUN Mode

TEACH Mode

Solid green

Power is on

Flashing green

Sensed light level is approaching sensing

threshold3

Solid red

Sensor “sees” its own modulated light source; pulse rate is proportional to the

received light signal strength4

Amber on

Outputs conducting

Ready to TEACH output ON condition

Amber off

Outputs not conducting

Ready to TEACH output OFF condition

Remote Configuration

The remote function can be used to configure the sensor remotely or to disable the push button for security. Connect the

gray wire of the sensor to ground (0 V dc), with a remote programming switch connected between them. Pulse the remote

line according to the diagrams in the configuration procedures. The length of the individual programming pulses is equal to

the value T where: 0.04 seconds ≤ “T” ≤ 0.8 seconds

Installation

Wiring Diagrams

Cabled Models

QD Models

bn

Remote

Teach

bu

wh

bk

gy

+

10-30V dc

–

Load

Load

bn

Remote

Teach

bu

wh

bk

gy

+

10-30V dc

–

Load

Load

3 This is the Stability indicator, which signals when maintenance, realignment, or reconfiguration is needed during RUN mode.

4 The faster the pulse rate, the stronger the light signal.

MINI-BEAM SME312 Expert Series

P/N 55214 Rev. G

www.bannerengineering.com - Tel: +1-763-544-3164

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