Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module User Manual - Manual (Page 13)

Publication 1746-UM003A-EN-P
Overview 1-3
RTD Compatibility
The following table lists the RTD types used with the RTD module and gives
each type’s associated temperature range, resolution, and repeatability
specifications. The next table shows the accuracy and temperature drift
specifications for the RTDs.
Table 1.1 RTD Temperature Ranges, Resolution, and Repeatability
Input Type Temp. Range
(0.25 mA Excitation)
(1)
Temp. Range
(1.0 mA Excitation)
(1)
Resolution Repeatability
(28 Hz, 50/60 Hz)
Platinum (385)
(2) 100
Ω
-200°C to +850°C
(-328°F to +1562°F) -200°C to +850°C
(-328°F to +1562°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
200
Ω
-200°C to +850°C
(-328°F to +1562°F) -200°C to +850°C
(-328°F to +1562°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
500
Ω
-200°C to +850°C
(-328°F to +1562°F) -200°C to +390°C
(-328°F to +698°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
1000
Ω
-200°C to +850°C
(-328°F to +1562°F) -200°C to +50°C
(-328°F to +122°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
Platinum (3916)
(2) 100
Ω
-200°C to +630°C
(-328°F to +1166°F) -200°C to +630°C
(-328°F to +1166°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
200
Ω
-200°C to +630°C
(-328°F to +1166°F) -200°C to +630°C
(-328°F to +1166°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
500
Ω
-200°C to +630°C
(-328°F to +1166°F) -200°C to +380°C
(-328°F to +698°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
1000
Ω
-200°C to +630°C
(-328°F to +1166°F) -200°C to +50°C
(-328°F to +122°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
Copper (426)
(2) (3) 10
Ω
-100°C to +260°C
(-328°F to +500°F) -100°C to +260°C
(-328°F to +500°F) 0.1°C
(0.1°F) ± 0.2°C
(± 0.4°F)
Nickel (618)
(2) (4) 120
Ω
-100°C to +260°C
(-328°F to +500°F) -100°C to +260°C
(-328°F to +500°F) 0.1°C
(0.1°F) ± 0.1°C
(± 0.2°F)
Nickel (672)
(2) 120
Ω
-80°C to +260°C
(-328°F to +500°F) -80°C to +260°C
(-328°F to +500°F) 0.1°C
(0.1°F) ± 0.1°C
(± 0.2°F)
Nickel Iron (518)
(2) 604
Ω
-200°C to +200°C
(-328°F to +392°F) -200°C to +180°C
(-328°F to +338°F) 0.1°C
(0.1°F) ± 0.1°C
(± 0.2°F)
(1) The temperature range for the 1000 Ω, 500Ω, and 604 Ω RTD is dependent on the excitation current.
(2) The digits following the RTD type represent the temperature coefficient of resistance (
α
), which is defined as the resistance change per ohm per C. For instance, Platinum
385 refers to a platinum RTD with α = 0.00385 ohms/ohm · C or simply 0.00385 / C.
(3) Actual value at 0 C is 9.042
Ω
per SAMA standard RC21-4-1966.
(4) Actual value at 0 C is 100 Ω per DIN standard.
IMPORTANT
The exact signal range valid for each input type is
dependent upon the excitation current magnitude that you
select when configuring the module. For details on
excitation current, refer to Appendix A.