Rs232 Communication Module; Rs485 Communication Module - HYDROMETER EW7731 Série Instructions D'installation

· Various Hydrometer receivers are available for receiving the pro-
tocol (e.g. Bluetooth, GPRS, LAN, ...)
· The protocol corresponds to the Open Metering or HYD standard
and is encrypted
· Reading modes: walk-by, drive-by, fixed network
For problematic radio installations (shield) the external radio mo-
dule set can also be used.

6.2.3 RS232 communication module

The RS232 communication module is a serial interface for com-
munication with external devices, e.g. PC; 300 or 2400 bauds.
The module contains a 3-pole terminal strip with terminals
marked 62(Dat), 63(Req) and 64(GND). A special adapter cable is
required for connection (order no. 087H0121). The coloured wires
are to be connected as shown:
62 = brown
63 = white
64 = green

6.2.4 RS485 communication module

The RS485 communication module is a serial interface for com-
munication with external devices, e.g. PC; 2400 bauds only.
The module contains a 4-pole terminal strip with terminals mar-
ked D+, D- und +12-. The
module needs an external
power supply of 12 V DC
±5 V.
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