M-Bus-Module WZU-Mx
Installation and Operating Guide
M-Bus-Module WZU-MB / MI
Subject to changes
Page 8 / 10
Afterwards, open the "
M-Bus Module G4"
submenu in the "
Parameterization“
menu:
If the NTA mode is parameterized for the M-bus module, this is indicated by the additional text field "NTA
mode" in the subitem "M-bus read-out mode" (in the example for module slot 1).
If „Normal read-out mode“ or „Fast read-out mode“ has been selected and the selection has been
confirmed with OK, the NTA functionality for the respective module will be ended.
The M--bus module WZU-Mx works according to the operating mode selected in the M-bus read-out mode
-
„normal read-out mode“ or „fast read-out mode“.
Note:
If the NTA mode has neither been parameterized for module slot 1 nor for module slot 2, the
meter's summer-/wintertime table can be parameterized again, if necessary. The switch from
summertime to wintertime is activated again.
5
Pulse pa
rt of the “MI” module
The “MI” module is equipped with two pulse inputs that are electrically isolated from the meter.
Note: The volume values calculated in the meter from the pulse inputs are not capable of being officially
calibrated.
In addition to a possible voltage supply from the M-
bus connection, the “MI” module is equipped with a
battery. This powers the module processor and the pulse input, if no M-bus voltage is applied.
As pulse transmitters for the pulse inputs, either isolated contacts (e.g. relay contacts or Reed contacts) or
electronic transmitters as “open collectors” can be used.
If an “open collector” circuit is used as the transmitter of the pulse inputs, the cable must always be
electrically isolated from the M-bus inputs of the MI module.
5.1 Technical data of the pulse part
Number of pulse inputs
2 pulse inputs per “MI” module
