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Connect Remote Power Off Cable and External Alarm Cable

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Remote Power Off Cable Connections -- Part 1 shows the location of the Remote Power Off (RPO) cable. The opposite end of the cable connects to the Emergency Power Off (EPO) switch located outside of the equipment room.

Even though the equipment room EPO switch disconnects main AC power to the equipment room, it cannot disconnect the battery power from the J58890CH. An auxiliary set of contacts inside the EPO are used for this function.

  1. Plug the RPO cable into the connector shown in Remote Power Off Cable Connections -- Part 1.

  2. Route the opposite end of the wires to the EPO switch. The opposite end of the RPO cable connects to the internal relay.


Note: The EPO switch and the auxiliary contacts (inside the EPO switch assembly) are customer-provided.


Caution! The auxiliary contacts inside the EPO switch assembly must close when the switch is pressed. This contact closure energizes the relay inside the power distribution unit, causing the connection to the battery holdover assembly to open.

Remote Power Off Cable Connections -- Part 2 shows the cabling from the auxiliary contacts inside the EPO switch assembly and how they connect to the internal relay.

  1. Connect the RPO wires to the auxiliary contacts on the EPO switch. See Remote Power Off Cable Connections -- Part 2.


Note: The EPO switch and the auxiliary contacts for the RPO connection are customer-supplied.

Remote Power Off Cable Connections -- Part 1

Remote Power Off Cable Connections -- Part 2

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