Connecting The Rs485 Signal Spd - Huawei SmartLogger2000 User Manual

SmartLogger2000
User Manual
A.2 Connecting the RS485 Signal SPD
When connecting the RS485 signal SPD, you need to connect its PE cable and
communications cable.
Prerequisites
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
Context
One RS485 signal SPD provides two RS485 surge protection ports.
Figure A-3 Ports on an RS485 signal SPD
Table A-1 Port description
RS485 Surge
Protection Port
RS485 surge
protection port 1
RS485 surge
protection port 2
Issue 04 (2018-04-10)
Prepare a ground cable. Recommended: outdoor copper-core cable with a cross-sectional
2
area of 4 mm or 12 AWG
Prepare a communications cable, for example, a two-core or multi-core cable with a
cross-sectional area of 0.5–2.5 mm
The way of connecting two to three RS485 signal SPDs is the same as the way of connecting one RS485
signal SPD.
Protection Function
Port
2 RS485A, RS485
differential signal+
6 RS485B, RS485
differential signal–
8 RS485A, RS485
differential signal+
12 RS485B, RS485
differential signal–
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A Installing and Wiring the RS485 Signal SPD
2
.
Surge Port Function
1 RS485A, RS485 differential
signal+
5 RS485B, RS485 differential
signal–
7 RS485A, RS485 differential
signal+
11 RS485B, RS485 differential
signal–
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