Installing The Rs485 Communications Cable - Huawei SUN2000-175KTL-H0 Quick Manual

Installing the RS485 Communications Cable

4.10
1. The RS485 and MBUS communication modes are mutually exclusive.
2. When routing communications cables, separate communications cables from power cables to
prevent communication from being affected.
Communication Port Pin Definition
Port Pin Definition
RS485-1 1 RS485A IN, RS485
differential signal+
3 RS485B, RS485
differential signal–
PE 5 PE, shielding ground
RS485-2 7 RS485A, RS485
differential signal+
Pin Definition
2 RS485A OUT, RS485
differential signal+
4 RS485B, RS485
differential signal–
6 PE, shielding ground
8 RS485B, RS485
differential signal–
14
Description
Used for cascading
inverters or connecting to
devices such as the
SmartLogger.
-
Used for connecting to
RS485 slave devices.