Connector Pin Assignment; Temperature Sensors; Flow Sensor - Zenner MULTIDATA WR3 Manual De Instalacion Y Uso

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Connector pin assignment

Temperature sensors

2-wire measurement:
Supply 1 – 2
Return 3 – 4

Flow sensor

pulse: 10
GND: 11
Input/Output
I/O 1: pulse:
GND:
M-Bus
L1: 24
L2: 25
Depending on the meter's model the version of the connection board
can differ. If water meters with a potential free reed contact are con-
nected to the inputs the connection can be made in any direction. Take
care of the polarity when connecting to a BMS. The connectors 24/25
are given twice for the incoming and outgoing of the M-bus wire.
2 4
Switch
Connection 2-wire
Connection 4-wire
4-wire measurement (optionally):
Supply
Return
52 I/O 2:
53
RS-232
DTR: 71
GND: 72
Tx: 73
Rx: 74
1 2 3 4
1 – 2 / 5 – 6
3 – 4 / 7 – 8
pulse: 54
GND: 55
RS-485
+UB: 71
GND: 72
A: 73
B: 74
10 11 9 50 51 52 53 54 55 71 72 73 74
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