Spectrum Controls 1794sc-IRT8I User Manual page 46

A-2 Flex™ IO Isolated RTD/Thermocouple Module
User's Manual Pub. 0300242‐01 Rev. A
Data format
Input Impedance
Common mode rejection
Isolation voltage (continuous voltage
withstand rating)
Open circuit protection
Overvoltage capability
Cold junction compensation Range
Cold junction compensator
Flexbus current
Power dissipation
Thermal dissipation
Keyswitch position
Module Accuracy
Thermocouple Accuracy
with 4.17 Hz filter
using Linearization per ITS-90
Type J (-50˚C to 1200˚C):
Type J (-210˚C to -50˚C):
Type N (-80˚C to 1300˚C):
Type N (-250˚C to -80˚C):
Type T (-180˚C to 400˚C):
Type T (-270˚C to -180˚C):
Type K (-180˚C to 1370˚C):
Type K (-270˚C to -180˚C):
Type E (-130˚C to 1000˚C):
Type E (-270˚C to -130˚C):
Type C (0˚C to 2315˚C):
Type B (600˚C to 1800˚C):
Type B (300˚C to 600˚C):
Type S (140˚C to -1760˚C):
Type S (0˚C to 140˚C):
Type R (280˚C to -1760˚C):
Type R (0˚C to 280˚C):
CJC accuracy
Voltage Accuracy
with 4.17 Hz filter
Engineering Units X1
Engineering Units X10
Raw/Proportional Counts
Scaled for PID
Percent of full scale
>1 M ohms for voltage, thermocouple, RTD
and resistance inputs
60 db @ 5V peak-to-peak, 50...60 Hz
User power to Backplane:24 VDC continuous
Channel to Backplane: 24 VDC continuous
Channel to Channel: 24 VDC continuous.
Channel to User power: 24 VDC continuous
Open circuit detection bias <1 uA with
ON/OFF capability
Voltage mode ± 24 VDC continuous (ten
minutes)
-20...100 °C
A-B catalog number 1794-CJC2
80 mA
7.25 W max @ 31.2V dc
Max 10.2 BTU/hr @ 31.2V dc
3
Accuracy Accuracy
Limit At Limit At 0-
25°C 55°C
4.17 Hz 4.17 Hz
Filter Filter
± 0.6 °C ± 2.3 °C
± 0.8 °C ± 3.3 °C
± 1.0 °C ± 1.5 °C
± 1.2 °C ± 3.0 °C
± 1.0 °C ± 1.5 °C
± 5.4 °C ± 8.5 °C
± 1.0 °C ± 1.5°C
± 7.5 °C ± 11.5 °C
± 0.5 °C ± 1.5 °C
± 4.2 °C ± 7.3 °C
± 1.8 °C ± 3.5 °C
± 3.0 °C ± 4.0 °C
± 3.0 °C ± 8.0 °C
± 1.7 °C ± 2.6 °C
± 1.7 °C ± 5.0 °C
± 1.7 °C ± 2.6 °C
± 1.7 °C ± 5.0 °C
± 1.0 °C 3.0 °C
Accuracy Accuracy
Limit At Limit At 0-
°25C °55C
Repeatability
Limit
At 25°C & 4.17
Hz filter
± 0.17 °C
± 0.25 °C
± 0.3 °C
± 1.9 °C
± 0.2 °C
± 1.5 °C
± 0.3 °C
± 3.6 °C
± 0.1°C
± 1.2 °C
± 0.9 °C
± 1°C
± 2°C
± 0.55 °C
± 1.0 °C
± 0.4 °C
± 1.0 °C
± 0.8 °C
Repeatability
Limit
At °25C & 4.17
Hz filter