Specifications

Publication 1794-SG002D-EN-P - May 2012
42 Select FLEX I/O Modules
1794-IF8IH HART Enabled Analog 8 Input Module
The 1794-IF8IH accepts up to 8 analog inputs. The inputs are isolated and will
accept current in either of the following two ranges: 4…20 mA or 0…20 mA. The
default input range is 0…20 mA. The inputs have both fixed hardware filters and
selectable firmware digital filters.
HART Enabled Analog 8 Input Module
Specification 1794-IF8IH
Current input, max overload 32 mA DC continuous, for any or all channels
Isolation voltage 120V (continuous), Basic Insulation Type
Type tested @ 1000V AC for 60 s, between user power to
system, channel to system, and channel to channel
Input resolution 16 bits – unipolar
15 bits + sign – bipolar
0.320 μA/cnt unipolar
0.640 μA/cnt bipolar
Input resistance 249 Ω ±1%
Data format Engineering Units
Percent of Full Scale
Proportional Count
Input conversion type Sigma Delta Analog to Digital Converter
Normal mode rejection ratio > 70 dB @ 50/60 Hz (4.17 Hz ADC conversion rate)
> 65 dB @ 50/60 Hz (10.0 Hz ADC conversion rate)
> 75 dB @ 50 Hz (16.7 Hz ADC conversion rate)
> 85 dB @ 60 Hz (19.6 Hz ADC conversion rate)
Calibration Factory calibrated
(1)
(1) Can be calibrated in field when necessary.
Step response to 63% of FS, input 4.17 Hz conversion rate = 480 ms
10.0 Hz conversion rate = 200 ms
16.7 Hz conversion rate = 120 ms
19.6 Hz conversion rate = 101 ms
62 Hz conversion rate = 32 ms
470 Hz conversion rate = 4 ms
Dimensions (HxWxD), approx 46 x 94 x 75 mm (1.8 x.7 x 2.9 in.)
94 x 94 x 91 mm (3.7 x 3.7 x 3.6 in.) installed
Accuracy 0.1% Full Scale @ 25 °C