Quick Guide - Correct connection of OPTEX barriers with a wireless transmitter

To ensure proper operation of OPTEX barrier connected to a wireless transmitter, the barrier GND must be connected to the transmitter GND

Connection procedure

1. Identify the 2-pin cable

The barrier transmitter has a 2-pin cable with a blue wire and a green wire.

This cable is normally used for tamper or battery low reporting.

If you do not use that function, use this cable for the barrier GND connection.

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2. Connect the cable to the BCU-5 receiver

Connect the 2-pin cable to the power connector on the BCU-5 receiver.

• Blue wire → GND

• Green wire → Not used

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3. Connect the GND to the wireless transmitter

Connect the blue wire to the GND terminal of the wireless transmitter.

Connect it together with the yellow ALARM NC wire.

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Wiring diagram

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Result

The barrier and the wireless transmitter now share the same GND.

This ensures correct and reliable operation.