User Manual

15
Smart Infrastructure
CE2N5324en
2019-06-27
M-Bus modules
WZU-MB G4
WZU-MI
Function description
The M-bus modules (WZU-MB G4 and WZU-MI) are used by the meter to c
ommunicate with
an M-bus central unit to transmit measured values.
With the 2 M-bus modules, the secondary address is identical for both modules. It can be
adjusted on the device using the module on slot 1 or via M-bus.
The data on the M-bus module is refreshed every 15 minutes.
A shorter sampling cycle can be set using the UltraAssist software.
The modules are available in 2 different versions:
WZU-MB G4 M-bus module for heat and heat/cooling energy meters, generation
4,
recommended as of firmware 5.15 per EN 1434-3
WZU-MI M-bus module with 2 pulse inputs for heat and heat/cooli
ng
ener
gy meters, generation 4, recommended as of firmware 5.15 per
EN 13757 and EN 1434-3
NOTICE
Module WZU-MB G4 can be used in both slots. Always plug module WZU-MI into slot 1.
M-bus module with 2 pulse inputs
WZU-MI