Landis+Gyr WZU-M Series Installation And Operating Manual
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M-Bus-Module WZU-Mx Installation and Operating GuideM-Bus-Module WZU-MB / MI Subject to changes Page 1 / 10Safety Information- Comply with ESD protection measures- The M-bus module with pulse inputs is supplied with a built-in battery – avoid short-circuits on thePCB- Disconnect the M-bus voltage during connection work- Route connecting cables only through the bush sleeves of the meter- Do not cut the bush sleeves shorter than necessary because this may lower the degree of protection1 Description of functionThe M-bus module is an add-on module for the typeUH50 meter (firmware 5.15 and higher). The moduleenables the meter to communicate with an M-buscenter in order to transmit measured values.This description applies to M-bus modules of the “4thgeneration”: These modules are available in twotypes:- WZU-MB G4 (type “MB G4”)no picture- WZU-MI with pulse inputs (type “MI”), see picturepicture: WZU-MIThe module has two integrated pulse counters and calculates cumulated volumes from the pulses comingfrom connected pulse transmitters according the parametrized significance. These volume values aretransmitted to the UH50 where they are stored and can be displayed or output as required. If no M-busvoltage is connected, a battery powers the module processor and the pulse inputs.For the module firmware 4.11 and higher and the meter firmware 5.17 and higher, the modules arealso suitable for NTA-compliant communication.There is also the predecessor model of the 2nd generation. The description of the functions makes adistinction where this is appropriate.2 Installation and assemblyThe UH50 meter has two module slots for fitting add-on modules. These are named “Modul 1” and“Modul 2” on the dial plate (visible after removing the cover).Module “MB G4” may fitted on both of the slots. Module „MI“ (with pulse inputs) must only be fitted atslot module 1.Module “MI” is supplied with a built-in battery. Short-circuits on the PCB must be avoided. The relevantrules for handling electrostatically sensitive devices must be observed.M-bus Pulse1 Pulse2+ - + -90 63 590 c 2010/08/09 |
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