Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module/ Instructions User Manual
Page 19

SLC 500™ RTD/Resistance Input Module 19
Publication 1746-IN007C-EN-P - December 2002
RTD Temperature Ranges, Resolution, and Repeatability
Input Type
Temp. Range
(0.25 mA Excitation)
(1)
(1)
The temperature range for the 1000
Ω
RTD is dependent on the excitation current.
Temp. Range
(1.0 mA Excitation)
Resolution
Repeatability
Platinum
(385)
(2)
(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.
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)
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)
(3)
(3)
Actual value at 0°C is 9.042
Ω
per SAMA standard RC21-4-1966.
10
Ω
-100°C to +260°C
(-328°F to +500°F)
-100°C to +260°C
(-148°F to +500°F)
0.1°C
(0.1°F)
±0.2°C
(±0.4°F)
Nickel
(618)
(4)
(4)
Actual value at 0°C is 100
Ω
per DIN standard.
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)
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)
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)