Iolan Sds4 Hl Device Server Manual

I/O Wiring Diagrams 419

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