Perle Systems IOLAN SCS Manual de usuario Pagina 373

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I/O Wiring Diagrams 373
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.
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.
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.
A1+
A1-
A1s
A2s
A2+
A2-
A3+
A3-
A3s
A4s
A4+
A4-
return
excite
sense
COM
NC
NO
NO
COM
NC
R1
R2
COM
NC
NO
NO
COM
NC
R2
R1
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