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8 Installation
Electrical connection
The following figure shows the rear panel of the ERZ2000-NG.
The USM GT400 is connected to the serial interface COM6.
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Fig. 8.18: Connection of the USM's Modbus interface to COM 6
USM GT400 terminal compartment
Three serial interfaces for Modbus communication are available on the USM
GT400. For instance F Modbus communication, the RS 485-2 is provided with
terminal 21 (GND), terminal 22 (Data +) and terminal 23 (Data -).
Fig. 8.19: Connection of the RS 485-2 (22 +, 23 -) at the USM GT400
Manual USM GT400 · EN10 · May 2021
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