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What woudl cause no voltage on O1 and ground when SC and I1 are jumpered on a 900-2RS.

Resolution:

Following could cause the outputs O1 and O2 on 900-2RS not to operate when input 1 or input 2 are activated:

The fire alarm jumper is not in place or the fire alarm is in an open position if connected to the 900-2RS board.
No power to the PS914 power supply mother board.
Defective 900-2RS board.

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