APM PV17KM3TL, User Manual

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Connection Steps
：
1. Connect a 120 termination resistance in series at the first solar inverter. Ω
2. Connect the RS485 ports of all inverters in a zigzag pattern.
3. Connect the last inverter with a RS485/RS232 converter to enable the communication with
a PC.
The RS485 RS232 converter and monitoring software mentioned above are auxiliary products
/
of APM Technologies, you can order them from APM.
4.7.2 LAN Communication
When a user opts for to the LAN communication, it is only needed to connect one end of the
cable with solar inverter, and connect the other end of cable with a PC.
RS485 IN
1
2 3
4
1
2 3
4
1
2 3
4
1
2 3
4
1
2 3
4
1
2 3
4
120Ω
RS485 OUT
RS485 IN RS485 IN
RS485 OUT RS485 OUT
+
-
+
-
DC Switch
ON
OFF
+
-
+
-
+
-
+
-
DC Switch
ON
OFF
+
-
+
-
Unit 1 Unit 2 Unit 3
Smart MTL Series 3-Phase Inverter User Manual--Installation
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