CGU 04i DESCRIPTION
17
Circuit example of the equipment with a modem with data length more than 10 m:
At RS422 data cable more than 10m it is need to use overvoltage protection on the
modem side!
1Y
2Y
DC
Meter
SGND
TxD (-)
TxD (+)
RxD (-)
RxD (+)
Modem
CGU 04i
Pin 1 – SGND
Pin 2 – SGND
Pin 3 – RxD (-)
Pin 4 – RxD (+)
Pin 5 – TxD (-)
Pin 6 – TxD (+)
Pin 7 – +12V EXT
Pin 8 – +12V EXT
+
1X
2X
OVPM-31
1X
2X
1Y
2Y
