12
ArmorPOINT RTD and Thermocouple Input Modules
Publication 1738-IN005B-EN-E - January 2013
Specifications
ArmorPOINT RTD and Thermocouple Input Modules –
1738-IR2M12, 1738-IT2IM12
Attribute
Value
Inputs per module
1738-IR2M12
– 2 single-ended, nonisolated
1738-IT2IM12
– 2 differential, individually isolated
Resolution
1738-IR2M12
– 16 bits, 9.5 mV/cnt, 0.03 °C/cnt (Pt385 @ 25 °)
1738-IT2IM12
– 15 bits plus sign, 2.5 mV/cnt
Thermocouple type (and
resolution average over span)
1738-IT2IM12 only
Sensor
Range
Resolution (average over span)
Type B
30…1820 °C
3 counts/°C
Type C
0…2315 °C
6 counts/°C
Type E
-270…1000 °C
24 counts/°C
Type J
-210…1200 °C
21 counts/°C
Type K
-270…1372 °C
13 counts/°C
Type N
-270…1300 °C
11 counts/°C
Type R
-50…1768.1 °C
4 counts/°C
Type S
-50…1768.1 °C
4 counts/°C
Type T
-270…400 °C
15 counts/°C
RTD sensors supported
1738-IR2M12 only
100
Ω
Pt
α
= 0.00385 Euro (-200…870 °C)
200
Ω
Pt
α
= 0.00385 Euro (-200…630 °C)
100
Ω
Pt
α
= 0.003916 U.S. (-200…630 °C)
200
Ω
Pt
α
= 0.003916 U.S. (-200…630 °C)
10
Ω
Cu
α
= 0.00427 (-200…260 °C)
100
Ω
Ni
α
= 0.00618 (-60…250 °C)
120
Ω
Ni
α
= 0.00672 (-60…250 °C)
120
Ω
Ni
α
= 0.00618 (-60…250 °C)
Cold junction
compensation range
1738-IT2IM12
– 0…70 °C
Input range
1738-IR2M12
– 0…600
Ω
1738-IT2IM12
– ±75 mV
Absolute accuracy
(1)
0.1% full scale @ 25 °C
Accuracy drift w/temp
30 ppm/°C
