Westermo ODW-730-F1 User Manual

Page 18

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18

6651-2241

RS-485 termination at system level
The system should be installed in according to the RS-485 specification. A system should
always form a bus structure where the termination is at the end points of the bus.
See diagrams for details of how this is done with RS-485 2-wire and 4-wire.

=Termination

ODW-730 Series

Slave unit

Slave unit

Slave unit

ODW-730 Series

Slave unit

Slave unit

Slave unit

Max 0.3 metre

=Termination

T/R+
T/R–

T/R+

T/R–

T/R+

T/R–

T/R+

T/R–

R+
R–
T+
T–

R– R+

R+

T–

T–

R– R+ T– T+

T+

T+ R–

N.B. R+/R–, T+/T– definitions are not standard, it can help to shift + and – if the unit

does not work.

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