Specifications

Publication 1794-SG002D-EN-P - May 2012
Select FLEX I/O Modules 47
1794-IRT8 Derating Curve
The area within the curve represents the safe operating range for the module
under various conditions of user supplied 24V DC supply voltages and ambient
temperatures.
= Safe operating area
Data format 16 bits, 2’s complement;
Offset binary (unipolar)
Settling time 100% of final value available at system throughput rate
Normal mode rejection ratio 60 dB @ 60 Hz
Common mode rejection ratio -115 dB @ 60 Hz
-100 dB @ 50 Hz
Common mode input range ± 10V
Accuracy
(1)
With filter (max): 0.025% Full Scale @ 24 °C (±0.5 °C)
Without filter (max): 0.05% Full Scale @ 24 °C (±0.5 °C)
System throughput 325 ms (1 channel scanned), programmable to 28 ms
2.6 s (8 channels scanned), programmable to 224 ms
Open input detection Available at system throughput rate
Open circuit detection type Out of range reading (upscale)
Overvoltage capability 35V DC, 25V AC continuous @ 25 °C
250V peak transient
Channel bandwidth 0…2.62 Hz (-3 dB)
RFI immunity Error of <1% of range @ 10V/m, 27…1000 MHz
Input offset drift with temperature +6 μV/°C max
Gain drift with temperature, max 10 ppm/ °C
Overall drift with temperature, max 50 ppm/ °C of span
Cold junction compensation range 0…70 °C
Cold junction compensation A-B Cold Junction Compensation Kit, 1794-CJC
(2)
Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.)
94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed
(1) The number is based on the hardware of the module only. Refer to the user manual for the complete error
calculation procedure.
(2) Kit supplied with the module and contains 2 compensators.
Thermocouple/mV Input Module
Specification 1794-IT8
Ambient Temperature °C
User Applied 24V DC Supply