Specifications

Publication 1794-RM001F-EN-P - September 2011

3-12 FLEX I/O Modules

Wiring the RTD Input Module

In addition to following the General Considerations when using Any FLEX

I/O Analog Input Module on page 3-7, before wiring the module, consider

the following application guideline:

• RTDs cannot be wired in parallel without severely affecting their

accuracy. Two sensors must be used.

Figure 3.11 FLEX I/O Analog RTD Module Wiring

RTD

Input Module

RTD

Input Module

Thermocouple/

RTD/mV

Input Module

Thermocouple/

RTD/mV

Input Module

1794-TB3T

1794-TB3G

1794-IR8

1794-IRT8

4-Wire RTD

3-Wire RTD

Note: 2, 3, or 4-wire RTDs can be used as applicable to the associated RTD input module.

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