janitza UMG 103-CBM, User Manual And Technical Data

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13.5 Connection example
The circuit diagram shows a connection variant of
the device with:
• Supply voltage and voltage measurement.
• Current measurement.
• RS-485 interface with Modbus RTU protocol.
UMG 103-CBM
RS485
2 3
A B
1
Data GND
Strommessung
Current measurement
Mess- und Versorgungsspannung
Measuring and supply voltage
Verbraucher
Load
A
B
C
S2
S2
S2
S1
S1
S1
Connection variant in three-phase four-wire system".