Huawei SmartLogger2000 series Quick Manual page 33

How Should I Install the RS485 Signal SPD?
15.6
NOTE
1. In the smart array controller embedded with the SmartLogger2000-10/10-B/11-B, the RS485 signal
SPD has been factory installed. In a non-smart array controller, an RS485 signal SPD is
recommended if the SmartLogger2000-10/10-B/11-B connects to an outdoor device over the COM
port to enhance the surge protection capability of the SmartLogger. Huawei PowerSA-5KA-15V
RS485 signal SPD is recommended.
2. Each RS485 signal SPD can connect to two COM ports. Each SmartLogger can be configured
with a maximum of three RS485 signal SPDs.
3. When an RS485 signal SPD is to be installed in a non-smart array controller, you are advised to
install it on a guide rail.
4. When determining the installation position, verify that the direct distance between the RS485
signal SPD and the SmartLogger is not greater than 500 mm.
5. If the SmartLogger is installed on a guide rail, the RS485 signal SPD can share the guide rail with
the SmartLogger. In this case, the recommended guide rail length is 600 mm or greater.
6. Secure the guide rail before mounting the RS485 signal SPD.
Clamp the RS485 signal SPD to the guide rail.
How Should I Connect the RS485 Signal SPD?
15.7
The way of connecting two or three RS485 signal SPDs is the same as the way of connecting one
RS485 signal SPD.
Connecting the Ground Cable
Recommended: an outdoor copper cable with a cross-sectional area of 4 mm
Strip 8 mm of the cable insulation layer from one end, and secure the cable to port 3 on the RS485
signal SPD.
NOTICE
 Connect the other end of the ground cable to the ground bar.

Recommendation: To enhance the corrosion resistance of a ground terminal, silica gel or paint
might be needed.
32
2
(12 AWG)