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1794-IF4I

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Allen-Bradley 1794-IF4I is a four-channel isolated FLEX I/O analog input module with configurable voltage or current ranges and selectable conversion time.
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Technical specifications for 1794-IF4I

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1794-IF4I
  • Product Family:
    Flex I/O
  • Product Type:
    FLEX I/O 4-Channel Isolated Analog Input Module
  • Stock:
    1
  • Analog inputs:
    4 isolated
  • Conversion method:
    Sigma-delta
  • Current ranges:
    0...20 mA, 4...20 mA, or ±20 mA
  • Voltage ranges:
    0...5 V, ±5 V, 0...10 V, or ±10 V
  • Unipolar resolution:
    16 bit
  • Bipolar resolution:
    15 bit plus sign
  • All-channel conversion time:
    2.5, 5, or 7.5 ms
  • Accuracy at 25 °C:
    0.1% of full scale
  • Nominal input voltage:
    24 V DC
  • Input voltage range:
    19.2...31.2 V DC
  • Maximum input current:
    145 mA
  • Operating temperature:
    -20...55 °C
  • Weight:
    0.097 kg
  • Estimated shipping dimensions:
    4.6x9.4x5.4cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    Singapore
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Isolation Strategy Channel Scaling Conversion Timing Product Applications

Features:

  • Four isolated channels: each input maintains a separate measurement domain
  • Configurable ranges: multiple current and voltage modes support varied transmitters
  • Selectable conversion: 2.5, 5, or 7.5 ms balances update speed and measurement behavior
1794-IF4I is intended for analog signals that benefit from channel-to-channel electrical separation within a distributed I/O station.

Its wider range set includes bipolar current as well as unipolar and bipolar voltage, making exact channel configuration part of the purchasing record.

Commissioning should prove isolation, scaling, update time, expected signal limits, and alarm behavior with each real field source.

Availability of 1794-IF4I is subject to Apter Power inventory and sourcing confirmation.
Allen-Bradley 1794-IF4I FLEX I/O 4-Channel Isolated Analog Input Module Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Assign each channel to a defined electrical domain

  • Source reference: identify grounded, floating, and externally powered signals.
  • Channel separation: retain the terminal-base isolation rating required by the design.
  • Shielding: document the approved termination for each cable.
  • Verification: measure unwanted potential before connecting field sources.

Pair every range with its engineering meaning

  • Current: choose 0...20, 4...20, or bipolar ±20 mA.
  • Voltage: select the exact 5 V or 10 V unipolar or bipolar range.
  • Resolution: apply the correct 16-bit or 15-bit-plus-sign data format.
  • Alarms: align raw thresholds with sensor limits and safe process action.

Set an update period that suits the measurement

  • Fast option: use 2.5 ms only where the application needs the response.
  • Intermediate option: document why 5 ms fits the process.
  • Long option: assess 7.5 ms with the required signal behavior.
  • System path: include network and controller timing in the observed update rate.

Officially supported application roles

  • Isolated transmitters: acquire four current or voltage signals with separated references.
  • Bipolar measurements: read supported positive and negative analog ranges.
  • Distributed process I/O: place precision measurements near field equipment.
  • Mixed-source panels: separate analog channels that do not share one clean common.
Description
1794-IF4I measures four individually isolated analog input channels with configurable current and voltage ranges. Its isolation separates channel measurement domains for applications with differing field references.

Sigma-delta conversion in 1794-IF4I can be configured for 2.5, 5, or 7.5 milliseconds across all channels. The module provides 16-bit unipolar or 15-bit plus sign bipolar resolution and a published 0.1 percent full-scale accuracy at 25 °C.

Engineering review for 1794-IF4I should coordinate range, conversion time, input source, isolation rating, scaling, sensor power, terminal base, shielding, and alarm logic. Faster conversion and greater isolation do not remove the need for a signal-quality test.
Revisions

Revision Part #

Also known as

1794-IF4I Series A
1794-IF4I/A, Series A
Alternative Names
Allen-Bradley 1794-IF4I analog module Rockwell Automation 1794-IF4I AB 1794 IF4I 1794IF4I isolated input FLEX I/O four-channel isolated analog 1794-IF4I 1794-IF4I Series A module
Technical notes
The model-specific risk for 1794-IF4I is configuring range and conversion time without checking the isolated source circuit. Document each channel’s current or voltage mode, field reference, sensor power, scaling, 2.5/5/7.5 ms setting, terminal base, shield path, and required channel-to-channel isolation.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
When is channel isolation the main reason to select 1794-IF4I?
It matters when field sources have different references or ground potentials and the published isolation, terminal base, and installation design fit the required separation.
How should conversion time be chosen for 1794-IF4I?
Compare the 2.5, 5, and 7.5 ms options with process dynamics, noise behavior, controller update, network timing, alarm response, and acceptance criteria.
Why can an isolated channel on 1794-IF4I still show unstable data?
Isolation does not correct a poor sensor supply, open shield, wrong range, loose terminal, excessive noise, incorrect scaling, or unstable field transmitter.
What must be documented for a bipolar current input on 1794-IF4I?
Record the ±20 mA range, source polarity and reference, terminal assignment, raw-data format, engineering scaling, expected limits, and controller alarm behavior.
How does the terminal base affect isolation use with 1794-IF4I?
Rockwell publishes different isolation ratings with specified base options, so match the exact terminal base to the required circuit separation and wiring layout.
Which test best confirms replacement 1794-IF4I channel performance?
Apply traceable low, mid, and high signals on each configured range, compare raw and scaled data, and verify alarms, update timing, and channel interaction.