User Manual

2
Siemens
A6V11991477_en--_a
2020-07-01
Use
The M-bus add-on module is used to integrate a mechanical water meter in a
M-bus system. The module can be retrofitted at any time:
Functions
The M-bus add-on module is fitted to a mechanical water meter which has an opening to
accommodate the module and is then secured with a screw. The module acquires the
information from the meter and passes it on to the M-bus system.
Readout parameters
The following parameters can be read out from the M-bus module:
● Addressing (Primary + secondary address)
● Identification of manufacturer
● Current consumption values (hot or cold water)
● Current time of day/date
● Due date
● Due date value
● 13 monthly values including monthly due date
● Cumulative reverse flow
● Fault state
● Device number, 12 digits (product number)
● Medium
Technical design
Detection of reverse flow
The add-on module is capable of detecting flow passing through the water meter in the
wrong direction.
Any reverse flow is subtracted from the current cumulated value. The volume is also saved
to a separate register.
Tamper proof
Since the module captures the water meter’s data optically, tampering with an external
magnet is not possible.
Parameterization
The following parameters can be set with the help of M-bus software on the add-on module:
● Primary address of 0 to 250
● Fabrication number (any 12-digit number, e.g. serial number of an assigned water meter)
● Counter value
● Medium (cold water/hot water)
● Next due date
● Device time
● Due date period (1 to 12 months)