Manual

4. Interconnection

031-132-B0-001 Rev. A

4.2 ECM Interface Topology and Connectors

The ECM PWR- GRI PCBA provides the interface between cabinet sensors,

APU control, and power conditioning to the ECM. The interface also supplies all

the necessary signals, alarms, logic power, and analog voltages required for

telemetry to the cable head end, central office, or network manager, and allows

the Alpha Systems control module to start and stop the Engine alternator as

part of network controlled periodic tests and exercises.

Fig. 4-1 ECM/APU Interconnection