How do you restore lost communication between QEL 1st Generation Device and the 2Q power supply option board?
There is supposed to be voltage and a communication signal between the 2Q power supply option board and the QEL 1st Generation exit device. If there is a break in the wiring between the power supply option board output terminals and the exit device, the communication breaks and needs to be restored. To restore communication, verify the wiring connections between the power supply and the device. Then between the input terminals and signal common (SC) terminal on the power supply option board, open and re-close the input circuits.
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