Wiring
Power and Network connections:
1. The unit is powered by an external 24VDC power supply. The external power supply’s positive 24VDC
output is wired to the Talk Back’s positive (+) terminal on the PWR IN terminal block The external power
supply’s negative 24VDC output is wired to the Talk Back’s negative (-) terminal on the PWR IN terminal
block.
2. Connect the data cable from a previous OP DATA OUT or router DATA OUT to the Talk Back’s DATA
IN port Connect a cable from the Talk Back’s DATA OUT port to the next OP DATA IN or to the next Talk
Back module’s DATA IN or to the head-end DATA IN in connector.
3. The PWR OUT terminal block can be used to power additional Talk Back units. A total of 65 units can
be powered by the same external 24VDC power supply.
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