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1. If using an external power supply, connect the ground (-) of the external supply to the ground (-) of the ACU’s main power supply

   1. Note: Openpath recommends that you use the “GND for INPUTS” on the I/O Elevator Board only if all input devices use the same voltage

2. Connect the Common “C” terminal C contact of the input device to the power supply

3. Connect the Normally Open “NO” terminal NO contact of the input device to the desired input terminal of the elevator boardan available input on the I/O Elevator Board

4. Repeat steps 2-3 for all input devices in use

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