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Connecting the RS485 Communications Cables
Pin Definitions of the Communications Port
Figure 5-33 Communications port
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Port |
Pin |
Definition |
Pin |
Definition |
Description |
|---|---|---|---|---|---|
RS485-1 |
1 |
RS485A IN, RS485 differential signal+ |
2 |
RS485A OUT, RS485 differential signal+ |
Used for cascading solar inverters or connecting to devices such as the SmartLogger. |
3 |
RS485B IN, RS485 differential signal– |
4 |
RS485B OUT, RS485 differential signal– |
||
Protection ground |
5 |
PE, shielding ground |
6 |
PE, shielding ground |
N/A |
RS485-2 |
7 |
RS485A, RS485 differential signal+ |
8 |
RS485B, RS485 differential signal– |
Used for connecting to an RS485 slave device.
|
Connecting the RS485 Communications Cables
When routing the communications cable, separate it from power cables to prevent communication from being affected. Connect the shield layer to the PE point. This section describes how to connect three communications cables.
Figure 5-34 Connecting RS485 communications cables (4–8 mm four-hole rubber plug)
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Figure 5-35 Connecting RS485 communications cables (4–8 mm two-hole or three-hole rubber plug)
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