SMA FLX Series - Manual (Page 48)

Illustration 5.13 Auxiliary Interfaces
5.9 RS-485 and Ethernet Connections
RS-485
Terminate the RS-485 communication bus at both ends.
• Termination is automatic when no RJ-45 plug is
inserted into the socket. The absence of a mating
connector enables both termination and bias.
• In rare cases, bias is unwanted, but termination is
required. To terminate the RS-485 bus, mount a
100 Ω termination resistor into an RJ-45 field
mountable connector. Then insert the connector
(with resistor) into the unused RJ-45 connector.
The RS-485 address of the inverter is unique, and defined
at the factory.
Illustration 5.14 RJ-45 Pinout Detail for RS-485
1. GND
2. GND
3. RX/TX A (-)
4. BIAS L
5. BIAS H
6. RX/TX B (+)
7. Not connected
8. Not connected
Bold = Compulsory, Cat5 cable contains all 8 wires.
For Ethernet: 10Base-TX and 100Base-TX auto cross-over.
Technical Data
L00410568-03_2q / Rev. date: 2014-06-20 47
5 5