Westermo ODW-632 User Manual
Page 22
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22
6650-2253
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-632
Slave unit
Slave unit
Slave unit
ODW-632
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–
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