Rockwell-automation 1790-XXXX CompactBlock LDX I/O DeviceNet RTD and T Manual do Utilizador descarregar pdf (Página 12)

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Publication 1790-IN011B-EN-P - April 2003

3-Wire RTD Configuration

4-Wire RTD Configuration

Wiring Resistance Devices (Potentiometers)

Potentiometer wiring requires the same type of cable as

that for the RTD. Potentiometers can be connected to the

module as a 2-wire or 3-wire connection as shown in the

following figures:

2-Wire Potentiometer Interconnection

CH0_A

CH0_B

COM

Cable Shield (to Ground)

RTD EXC

RTD EXC

Sense

Sense

Return

Return

CH0_A

CH0_B

COM

Cable Shield (to Ground)

RTD EXC

RTD EXC

Sense

Sense

Return

Return

Leave this sensor wire open

CH0_A

CH0_B

COM

CH0_A

CH0_B

COM

Add Jumper

Cable Shield (to Ground)

RTD EXC

Return

Potentiometer

Add Jumper

Cable Shield (to Ground)

RTD EXC

Return

Potentiometer

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