Huawei SUN2000-250KTL Series User Manual page 63

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual
COM Port Pin Definitions
Figure 5-19 Communications port
Port Pin
RS485-1 1
3
PE 5
RS485-2 7
Procedure
Step 1 Connect the RS485 communications cables.
Issue 02 (2022-12-20)
Definition
RS485A IN, RS485
differential signal+
RS485B IN, RS485
differential signal–
PE, shield layer
grounding
RS485A, RS485
differential signal+
Copyright © Huawei Technologies Co., Ltd.
Pin Definition
2 RS485A OUT,
RS485 differential
signal+
4 RS485B OUT,
RS485 differential
signal–
6 PE, shield layer
grounding
8 RS485B, RS485
differential signal–
5 Installing Cables
Description
Used to cascade
SUN2000s or
connect devices such
as the SmartLogger.
-
Used to connect an
RS485 slave device.
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