The settings of the RS485 link are made through the SA1 switches:

SA1 description:

1:reserved

2:reserved

3:link termination between T- to R- (2 wires configuration) if set to ON

4:connection T- to R- (2 wires configuration) if set to ON

5:connection T+ to R+ (2 wires configuration) if set to ON

6:reserved

7:reserved

8:link termination between R+ and R- if set to ON

Network Management Card – User Manual

34003991EN/EB

Page 81/118

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