Rockwell Automation 1746-NR4 SLC RTD/Resistance Input Module User Manual - Manual (Page 73)

Publication 1746-UM008B-EN-P - December 2006
Channel Configuration, Data, and Status 73
The Data Format for 150
Ω Resistance Input table, the Data Format for
500
Ω Resistance Input table and the Data Format for 3000 Ω
Resistance Input table show the resistance ranges provided by the
1746-NR4.
Data Format for 10 Ω (1)
Copper 426 RTD
Excitation Current
Data Format
Engineering Units x 1 Engineering Units x 10
Scaled-for-PID
Proportional Counts
(Defaults)
0.1 °C 0.1 °F 1.0 °C 1.0 °F
0.5 mA not allowed --- --- --- --- --- ---
2.0 mA -1000…2600 -1480…5000 -100…260 -148…500 0…16,383 -32,768…32,767
(1)
Actual value at 0 °C (32 °F) is 9.042 Ω per SAMA standard RC21-4-1966.
Data Format for 150
Ω Resistance Input
Resistance Input Type
Data Format
Engineering Units x 1 Engineering Units x 10
Scaled-for-PID
Proportional Counts
(Defaults)
0.1
Ω (1)
1.0
Ω (1)
150
Ω
0…15,000 0…1500 0…16,383 -32,768…32,767
(1)
When ohms are selected, the temperature-units selection (bit 8) is ignored.
Data Format for 500
Ω Resistance Input
Resistance Input Type
Data Format
Engineering Units x 1 Engineering Units x 10
Scaled-for-PID
Proportional Counts
(Defaults)
0.1 Ω (1)
1.0 Ω (1)
500
Ω
0…30,000 0…3000 0…16,383 -32,768…32,767
1000
Ω
0…19,000 0…1900 0…16,383 -32,768…32,767
(1) When ohms are selected, the temperature-units selection (bit 8) is ignored.
Data Format for 3000 Ω Resistance Input
Excitation Current
Data Format
Engineering Units x 1 Engineering Units x 10
Scaled-for-PID
Proportional Counts
(Defaults)
0.1
Ω (1)
1.0
Ω (1)
0.5 mA 0…30,000 0…3000 0…16,383 -32,768…32,767
2.0 mA 0…19,000 0…1900 0…16,383 -32,768…32,767
(1) When ohms are selected, the temperature-units selection (bit 8) is ignored.