Rs-422 general advice – Westermo ED-20 User Manual
Page 11
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11
6609-2222
ED-20
(ED-20)
=Termination
4-wire termination
R+
R–
T+
T–
R– R+ T– T+
RS-422 general advice
4-wire
Twisted pair cable is recommended
Termination recommendations
The RS-422 line must be terminated.The receiver on each side shall be terminated.
RS-422 connection pins can be differently named. For some brands the T+ corresponds
to A, but other brands might use some other naming convention.
If a unit does not work it can help to swap A and B.
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