CGU 04i DESCRIPTION
19
Circuit example of the equipment with a modem with data length more than 10 m:
If an M-BUS data cable more than 10m it is need to use overvoltage protection on the
router side!
DC
Meter
SGND
MBUS (-)
MBUS (+)
Meter
SGND
MBUS (-)
MBUS (+)
Modem
CGU 04i
Pin 1 – SGND
Pin 2 – SGND
Pin 3 – MBUS (-)
Pin 4 – MBUS (+)
Pin 5 – MBUS (-)
Pin 6 – MBUS (+)
Pin 7 – +12V EXT
Pin 8 – +12V EXT
+
1X
2X
1Y
2Y
OVPM-21
