SUN2000-(30KTL-A, 33KTL, 40KTL)
User Manual
5 Electrical Connections
Issue 04 (2016-06-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
61
Context
Connecting an RS485 communications cable
An RS485 communications cable can be connected in two ways:
−
Terminal block connection
You are recommended to use a DJYP2VP2-22 2x2x1 network cable or a
communications cable with a conductor cross-sectional area of 1 mm
2
and cable
outer diameter of 14–18 mm.
−
RJ45 port connection
You are recommended to use a shielded RJ45 connector and a CAT 5E outdoor
shielded network cable with an outer diameter less than 9 mm and internal
resistance not greater than 1.5 ohms/10 m.
Select either connection mode during installation. Connecting to a terminal block is recommended.
When routing communications cables, ensure that communications cables are separated from
power cables and away from interfering source to prevent communication from being
affected.
Functions of the RS485 terminal block
Figure 5-27
Terminal block
Table 5-4
describes the functions of the RS485 terminal block.
Table 5-4
Functions of the RS485 terminal block
No.
Function
No.
Function
5
RS485A IN
6
RS485A OUT
7
RS485B IN
8
RS485B OUT
RJ45 connector pin definitions