Installation guide

Installation Guide RN3000US Jan13
40
Figure 5-6 Communication Wiring
Wiring procedure:
1) A resistance with 120Ω is connected at the initiating terminal of RS485
bus.
2) Plug the connector of the RS485 cable into corresponding RS485 terminal
of Inverter 1
3) The two lines of the other end of RS485 cable, labeled A and B, are
connected to corresponding lines of RS485 bus, as the above diagram.
4) Connect other inverters to RS485 bus in the same way.
5) At the end of RS485 bus, connect RS485 A cable to “RX+” port of
RS232-RS485 converter and connect RS485 B cable to “TX-” port of
RS232-RS485 converter
6) Connect RS232 port of RS485-232 converter to RS232 port of PC.
Information
All Digiwatts inverters are capable of RS485 communication. You can
mix different Digiwatts models on a single RS485 communication bus.
NOTICE!
RS485 bus requirements to ensure quality of communication:
 Shielding twist-pair type
 Shielding layer of RS485 bus should be single-point grounding to
avoid ground loops.