OM POWER OM2501A - Control Panel Connectors Pin-Out

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7.8. Control panel (rear side) connectors pin-out
TCVR connector DB 9 male
RS232 connection with TCVR. For CAT communication connect pin 2 RX-D,
pin 3 TX-D and pin 5 GROUND
CI-V connector Use CI-V connection for communication with ICOM type transceiver.
Signal CI-V is connected to the Tip.