E L C O p e r a t i o n M a n u a l
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MN05003006E
1-38
Warning: DO NOT wire to the non functional terminals
1.2.4.7 ELC-PV RS-485 Wiring
D+ D- SG
D+ D- SG
SG D+ D-
3
4
1
2
2
3
4
1. Master node
2. Slave node
3. Terminal resistor
4. Shielded cable
Note: 1. Terminal resistors are suggested to be connected to the devices at both physical ends
of the network with 120 resistors.
2. To ensure communication quality, please apply double shielded twisted pair cable
(20AWG) for wiring.
3. When voltage drop occurs between the internal ground references of two systems,
connect the systems with Signal Ground point (SG) for achieving equal potential
between systems so that a stable communication can be obtained.
