Huawei SmartLogger1000 User Manual page 41

SmartLogger1000
User Manual
Table 4-1 Port description
RS485
Surge
Protection
Port
RS485
surge
protection
port 1
RS485
surge
protection
port 2
Procedure
Step 1 Remove an appropriate length of steel armor and insulation layer from the cable using a wire
stripper, as shown in
Figure 4-4 Stripping an RS485 communications cable (unit: mm)
Step 2 Remove the terminal block from the SmartLogger COM port, as shown in
Issue 12 (2019-01-15)
Prote Function
ction
Port
2 RS485A, for RS485
positive differential
signaling
6 RS485B, for RS485
negative differential
signaling
8 RS485A, for RS485
positive differential
signaling
12 RS485B, for RS485
negative differential
signaling

Protection ports are connected to COM ports on the SmartLogger. Port 4 is not connected.

Surge ports are connected to RS485 ports of other devices. Port 3 is the ground port.
 Protection ports and surge ports must not be reversely connected.
 One RS485 signal SPD can protect two COM ports.

Protection ports 2 and 6 and surge ports 1 and 5 form an RS485 signal SPD port for protecting one
COM port. Protection ports 8 and 12 and surge ports 7 and 11 form another RS485 signal SPD port
for protecting one more COM port.
Figure
Copyright © Huawei Technologies Co., Ltd.
Surg
e
Port
1
5
7
11
4-4.
4 Electrical Connections
Function
RS485A, for RS485 positive
differential signaling
RS485B, for RS485 negative
differential signaling
RS485A, for RS485 positive
differential signaling
RS485B, for RS485 negative
differential signaling
Figure 4-5.
28