Rockwell Automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Instructions - Manual (Page 21)

SLC 500™ RTD/Resistance Input Module 21
Publication 1746-IN012B-EN-P - May 2001
RTD Temperature Ranges, Resolution, and Repeatability
RTD Type Temp. Range
(0.5 mA Excitation)
(4)
(4) The temperature range for the 1000 Ω RTD is dependent on the excitation current.
Temp. Range
(2.0 mA Excitation) Resolution Repeatability
Platinum
(385)
(1)
(1) 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
(0.2 °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
(0.2 °F) ± 0.2 °C
(± 0.4 °F)
500
Ω
-200 °C to +850 °C
(-328 °F to +1562 °F) -200 °C to +850 °C
(-328 °F to +1562 °F) 0.1 °C
(0.2 °F) ± 0.2 °C
(± 0.4 °F)
1000
Ω
-200 °C to +850 °C
(-328 °F to +1562 °F) -200 °C to +240 °C
(-328 °F to +464 °F) 0.1 °C
(0.2 °F) ± 0.2 °C
(±0.4 °F)
Platinum
(3916)
(1)
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
(0.2 °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
(0.2 °F) ± 0.2 °C
(± 0.4 °F)
500 Ω -200 °C to +630 °C
(-328 °F to +1166°F) -200 °C to +630 °C
(-328 °F to +1166 °F) 0.1 °C
(0.2 °F) ± 0.2 °C
(± 0.4 °F)
1000 Ω -200 °C to +630 °C
(-328 °F to +1166°F) -200 °C to +230 °C
(-328 °F to +446 °F) 0.1 °C
(0.2 °F) ± 0.2 °C
(± 0.4 °F)
Copper
(426)
(1)(2)
(2) Actual value at 0°C is 9.042 Ω per SAMA standard RC21-4-1966.
10 Ω
Not allowed. (5)
(5) To maximize the relatively small RTD signal, only 2 mA excitation current is allowed.
-100 °C to +260 °C
(-148 °F to +500 °F) 0.1 °C
(0.2 °F) ± 0.2 °C
(± 0.4 °F)
Nickel
(618)
(1)(3)
(3) Actual value at 0°C is 100 Ω per DIN standard.
120 Ω -100 °C to +260 °C
(-148 °F to +500 °F) -100 °C to +260 °C
(-148 °F to +500 °F) 0.1 °C
(0.2 °F) ± 0.1 °C
(± 0.2 °F)
Nickel (672) 120 Ω -80 °C to +260 °C
(-112 °F to +500 °F) -80 °C to +260 °C
(-112 °F to +500 °F) 0.1 °C
(0.2 °F) ± 0.1 °C
(± 0.2 °F)
Nickel Iron
(518) 604 Ω -100 °C to +200 °C
(-148 °F to +392 °F) -100 °C to +200 °C
(-148 °F to +392 °F) 0.1 °C
(0.2 °F) ± 0.1 °C
(± 0.2 °F)