Franklin Electric SubDrive Solar Manuel D'installation page 35

RS-485 Communication Addendum
Solar Panels Wired in Series:
When solar panels are wired in series, the positive terminal of one solar panel is wired to the negative
terminal of the next solar panel.
When panels are connected in series:
1. Make sure the unit is disconnected from the power;
2. Connect the wires from the communication device to the Terminal Block on the COMM board
labeled "RS-485" to terminals B-, A+, and GND. (Figure 1) (Torque specification: 15 in-lbs/1.7
N-m).
Figure 14: RS-485 Wiring Connections
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