7M User’s Manual 10
2.2.1 Communication connection
There are multiple options for communication available for interaction with the outside world.
• IR communication module (option) using the MODBUS. It can be used for setting and testing the meter using USB adapter
• Pulse output (option) module is used for counting the number of pulses depending on consumed energy
• LED is used for indication of no-load condition (I < 0,02A) and test output proportional to measured active energy
(1 imp/Wh). It can be also switched to reactive energy for test purposes using communication
• RS485(Modbus) (option) communication module is a galvanic isolated from the meter. It enables setting the meter
and data readout in the network
• M-Bus (option) communication module is galvanic isolated form meter. It enables setting the bound rate and the
address of the meter (for more information see appendix 8.2)
• NFC (option) enables an easy setting and downloading meter data via mobile app
• Cap touch is used to select a display of desired measured or group of them
*It is intended to be used for shielding for RS485
Table 1: Survey of communication connection
Check connection diagram on the side of the meter to check what modules are built in
AUXILIARY TERMINAL 1 2 3
Pulse output S0+ S0–
M-Bus M+ M–
RS485 A *SC B
PLEASE NOTE
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