11
(Optional) Installing the RS485 Communications Cable
4.5
COM port (COM)
When laying out communications cables, separate them from power cables to avoid strong
signal interference sources.
Ensure that the exposed core wire is totally inserted into the cable hole and connected securely.
If only one signal cable needs to be connected, block the unused cable hole on the seal using
a cap and tighten the cable gland.
If two signal cables are required, ensure that they have the same outer diameter.
No.
Label
Definition
Description
1
485B1
RS485B, RS485 differential signal
–
Reserved, can connect to the RS485 signal
port on the energy meter.
2
485A1
RS485A, RS485 differential
3
485B2
RS485B, RS485 differential signal
–
Reserved, can connect to the RS485 signal
port on SmartPSB2000L smart PV safety
box.
4
485A2
RS485A, RS485 differential
5
12V
–
Negative of the 12 V power supply
6
12V+
Positive of the 12 V power supply
7
N/A
N/A
N/A
8
PE
Grounding the shield layer
Connects to the shield layer of the cable.
