A Installing And Wiring The Rs485 Signal Spd; Installing The Rs485 Signal Spd - Huawei SmartLogger2000 User Manual

SmartLogger2000
User Manual
A
Installing and Wiring the RS485 Signal
A.1 Installing the RS485 signal SPD
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Prerequisites
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Issue 04 (2018-04-10)
If the SmartLogger2000-10/10-B/11-B needs to connect to an outdoor device over a
COM port, you are advised to connect an RS485 signal SPD between the SmartLogger
and the device to strengthen the surge protection capability.
Each RS485 signal SPD can connect to two COM ports. Each SmartLogger can be
configured with a maximum of three RS485 signal SPDs.
For a smart array controller factory-installed with the SmartLogger2000-10/10-B/11-B,
the RS485 signal SPD has been installed before delivery. In a non-smart array controller,
the RS485 signal SPD can be mounted on a guide rail.
When determining the installation position, verify that the linear distance between the RS485 signal SPD
and the SmartLogger is not greater than 500 mm.
Prepare an RS485 signal SPD. The recommended model is PowerSA-5KA-15V and can
be purchased from Huawei.
To install an RS485 signal SPD on a guide rail, prepare a 35 mm wide standard guide rail
that complies with the specifications shown in
guide rail length is 80 mm or greater.
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A Installing and Wiring the RS485 Signal SPD

Figure A-1. The recommended valid
SPD
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