Perle Systems 5500161-40 - Manual (Page 389)

I/O Wiring Diagrams 389
Wiring I/O Diagrams
RTD 4-Wire
In a 4-wire RTD configuration, connect the return wire to A1+, the excite wire to A1-, the sense wire
to A1s, and leave the fourth wire disconnected.
A1+ A1- A1s A2s A2+ A2- A3
+
A3
-
A3
s
A4
s
A4
+
A4
-
re
turn
exc
ite
sens
e
Relay Output
Normally Open Contact
To connect Relay channel R1 for a circuit that is normally inactive, connect one wire to the COM
(common) connector and one wire to the NO (normally open) connector.
COM NC NO NO COM NC
R1 R2
Normally Closed Contact
To connect relay channel R1 for a circuit that is normally active, connect one wire to the COM
(common) connector and one wire to the NC (normally closed) connector.
COM NC NO NO COM NC
R2 R1