Connecting Rs485 Communications Cables - Huawei SUN2000 User Manual

SUN2000 (8KTL-28KTL)
User Manual
Figure 5-26 RS485 communication mode (2)

5.4.2 Connecting RS485 Communications Cables

Connect the SUN2000 to communications equipment (such as the data collector and PC
terminal) over RS485 communications cables.
Context
You are recommended to use 24 AWG outdoor shielded network cables with the internal
resistance less than or equal to 1.5 ohms/10 m and external diameter of 4.5 mm to 7.5 mm as
RS485 communications cables.
A waterproof RJ45 connector has five parts: plug, housing, screw nut, seals, and sealing nut.
See
Issue 07 (2014-07-30)
 The length of the communication cable should be less than 1000 m.
 If multiple SUN2000s are connected to the monitoring device over an RS485/RS232 converter, a
maximum of six SUN2000s can be connected in a daisy chain.
 If multiple SUN2000s are connected to a Smart Logger, a maximum of 60 SUN2000s can be
connected in three daisy chains (a maximum of 20 SUN2000s is supported in one daisy chain).
Figure 5-27.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
59