Technical information

I/O Wiring

I/O connections include universal inputs, analog outputs, digital inputs, and digital outputs.

See Figure-2, Figure-3, and Figure-4 for proper wire terminal information.

Caution: If shielded cable is used, connect only one end of the shield to earth ground at

controller.

Universal Inputs (UI), Analog Outputs (AO), and Digital Inputs (DI)

Caution:

• Input and output devices cannot share common wiring. Each connected device requires

a separate signal and return conductor.

• Power wiring cannot share conduit with UI, AO, S-Link, LON, or DI wiring.

Note:

• If maximum closed switch voltage is not more than 1.0 V and minimum open switch

voltage is at least 4.5 V, then solid state switches may be used for a UI or a DI.

• UI, AO, DI, and S-Link wiring can share a single conduit.

UI, AO, DI, wiring needs at least 24 gage (0.51mm), twisted pair, voice grade telephone wire.

The capacitance between conductors cannot be more than 32 pF per foot (0.3m). If shielded

cable is used, the capacitance between any one conductor and the others, connected to the

shield, cannot be more than 60 pF per foot (0.3m). Table-1 provides wiring specifications.

Table-1 UI, AO, and DI Wiring Specifications.

Connection

Gage

AWG (mm)

Maximum Distance

ft. (m)

UI, AO, and DI

18 (1.02) 300 (91)

20 (.81) 200 (61)

22 (.65) 125 (38)

24 (.51) 75 (23)