ZENNER MULTIDATA WR3 - Manual (Page 4)

4
Connector pin assignment
Temperature sensors
2-wire measurement
Supply
1 - 2
Return 3 - 4
4-wire measurement (optionally)
Supply
1 - 2 / 5 - 6
Return 3 - 4 / 7 - 8
Flow sensor
Flow sensor pulse 10
GND 11
Input/Output
I/O 1 pulse 52
GND 53
I/O 2 pulse 54
GND 55
M-Bus
M-Bus L1 24
L2 25
RS-232
DTR 71
GND 72
Tx 73
Rx 74
RS-485
+UB 71
GND 72
A 73
B 74
Switch Connection 2-wire Connection 4-wire
Depending on the meter’s mo-
del the version of the connec-
tion board can differ.
2 4
or electric devices such as motors or pumps in
the immediate vicinity of the meter (minimum
distance 1 m). Cables leaving the meter should
not be laid parallel to live cables (230V, minimum
distance 0.2 m).
Declaration of Conformity
ZENNER International GmbH & Co. KG declares
that this product with the number of the EC type-
examination certificate DE-08-MI004-PTB012
complies with the requirements of the EC direc-
tives 2004/22/EC (Measuring instruments direc-
tive) and 89/336/ EEC (electro-magnetic compa-
tibility).
The most up-to-date information about this pro-
duct and of our installation notice can be found at
www.zenner.com
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