Allen-Bradley 1756-IR12 - Page 80

80 Rockwell Automation Publication 1756-UM540E-EN-P - December 2017
Chapter 4 Temperature-sensing Analog Modules
Figure 14 - 1756-IRT8I Module Field-side with 3-wire RTD Input
Figure 15 - 1756-IRT8I Module Field-side with 4-wire RTD Input
Figure 16 - 1756-IRT8I Module Field-side Circuit with Thermocouple Input
0.1 µF
IN_x/RTD D
A/D Converter
IN_x(+)/A
1000 Ω
10 Ω
0.01 µF0.01 µF
1000 Ω
10 Ω
RTD
0.01 µF
0.01 µF
IN_x(-)/B
IN_x/RTD C
I exc
600 µA
I exc
600 µA
2.5V Vref
PGA
0.1 µF
IN_x/RTD D
A/D Converter
IN_x(+)/A
1000 Ω
10 Ω
0.01 µF0.01 µF
1000 Ω
10 Ω
RTD
0.01 µF
0.01 µF
IN_x(-)/B
IN_x/RTD C
I exc
600 µA
2.5V Vref
PGA
0.1 µF
IN_x/RTD D
A/D Converter
IN_x(+)/A
1000 Ω
10 Ω
0.01 µF0.01 µF
1000 Ω
10 Ω
TC
0.01 µF
0.01 µF
IN_x(-)/B
IN_x/RTD C
2.5V Vref
PGA