1794-IF8IH | Allen Bradley FLEX I/O Isolated Input HART Analog Module
1794-IF8IH | Allen Bradley FLEX I/O Isolated Input HART Analog Module

1794-IF8IH | Allen Bradley FLEX I/O Isolated Input HART Analog Module

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Part Number: 1794-IF8IH
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Part Number: 1794-IF8IH
Model: FLEX I/O Isolated Input HART Analog Module
Manufacturer: Allen Bradley
Condition: New & Original in Factory Packing
Factory Warranty: 12 Months

Number of inputs: 8 single-ended, isolated
Recommended terminal base unit: 1794-TB3, 1794-TB3S
Resolution: 16-bits unipolar; 15-bits plus sign bipolar
Current: 0.320 A/cnt unipolar; 0.640 A/cnt bipolar
Data format: 
Engineering Units4
Percent of Full Scale
RAW/Proportional Count

Conversion type: Sigma Delta

Input current terminal:
4...20 mA (user configurable)
0...20 mA (user configurable)
0 mA output until product is configured

Normal mode rejection ratio current terminal:
>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)

Common mode rejection ratio:
>60 dB @ 50 Hz
>60 dB @ 60 Hz

Step response to 99% current terminal:
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

Input resistance: 249 ?1%
Absolute accuracy?: 0.1% full scale @ 25°C
Accuracy drift with temperature?: 0.4% full scale for 0 55 ?C

Calibration required: 
Factory calibrated
Can be calibrated in field when necessary

Maximum overload: 32 mA continuous, one channel at a time

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.

Flexbus current: 80 mA @ 5V DC
Power dissipation, max: 4.8 W @ 31.2V DC
Thermal dissipation, max: 16.4 BTU/hr @ 31.2V DC
Terminal base screw torque: Determined by installed terminal base
Dimensions, approx. (H x W x D) with module installed in base: 94 x 94 x 66 mm (3.7 x 3.7 x 2.6 in.)
Indicators (field side): 1 red/green power/status indicator
External DC power supply voltage, nom?: 24V DC
External DC power voltage range: 19.2...31.2V DC (includes 5% AC ripple)
External DC power supply current: 190 mA @ 24V DC
Ambient temperature: 0°C Tamb 55°C (32°F Tamb 131°F)
North American temperature code: T4
IEC temperature code: T4
Keyswitch position: 3
Enclosure type rating: None (open-style)
Wire size: Determined by installed terminal base
Wire type: Shielded
Wiring category?: 2 - on signal ports; 3 - on power ports
Compatibility: HART 5
Device supported: 2, 3, 4 wires

  1. Includes offset, gain, non-linearity and repeatability error terms.
  2. If 24V DC is removed from the module, input resistance = 10 k .
  3. Use this conductor category information for planning conductor routing as described in Industrial Automation Wiring and Grounding Guidelines
  4. Engineering Units apply to HART data only.

  • Availability: In stock
  • Estimated Lead Time: Ships in 1 - 7 working days
  • Shipping Weight: 2 Kg

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