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1746-NI4

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Allen-Bradley 1746-NI4 is a four-channel differential analog input module with individually selectable ±10 V or ±20 mA measurement modes for SLC 500 systems.
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Technical specifications for 1746-NI4

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-NI4
  • Product Family:
    SLC 500
  • Product Type:
    SLC 500 Four-Channel Analog Input Module
  • Stock:
    1
  • Number of inputs:
    4 differential
  • Input selection:
    Individually selectable voltage or current
  • Voltage range:
    -10…+10 V DC
  • Current range:
    -20…+20 mA
  • Resolution:
    16-bit
  • Conversion method:
    Delta-sigma
  • Step response:
    60 ms
  • Backplane current:
    35 mA at 5 V DC and 85 mA at 24 V DC
  • Operating temperature:
    0…60 °C
  • Replacement terminal block:
    1746-RT28
  • Weight:
    0.2 kg
  • Estimated shipping dimensions:
    3.5x13x14.5cm
  • Tariff Code:
    8537101190
  • 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 Input Mode Selection Shield & Reference Analog Acceptance Product Applications

Features:

  • Four differential inputs: provides analog acquisition for compact SLC applications
  • Mixed signal choice: each channel can use the documented voltage or current range
  • 16-bit conversion: supports scaled process measurements with a defined 60 ms response
1746-NI4 allows a small SLC system to combine voltage and current inputs without dedicating one module to each signal type.

Its value depends on channel-by-channel mode and scaling records that follow the physical loop.

Differential wiring improves measurement control but does not remove grounding, shielding, or common-mode design requirements.
Apter Power can review 1746-NI4 channel modes, terminal block, official records, condition, and exact sourcing requirements.
Allen-Bradley 1746-NI4 SLC 500 Four-Channel Analog Input Module Manuals,Datasheets,Link
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.
  • Per-channel choice: document voltage or current mode for every loop
  • Source compatibility: match the transmitter output and test equipment to the selected range
  • Scaling pair: retain raw and engineering-unit endpoints with the channel record
  • Differential pair: keep each signal and return together through the cable route
  • Shield termination: follow the approved single-point grounding practice
  • Potential review: prevent loop references from exceeding the documented input boundary
  • Known source: inject low, midpoint, and high values for each selected range
  • Response check: allow for the documented conversion and step behavior
  • Program proof: compare raw counts, scaling, alarms, and displayed engineering units
  • Process transmitters: acquire supported current-loop measurements
  • Voltage sensors: read differential signals within the selected ±10 V range
  • Mixed analog panel: combine current and voltage channels in one compact SLC slot
Description
Four differential analog channels are provided by 1746-NI4 for SLC 500 measurements. Each input can be selected for the documented -10 to +10 V DC or -20 to +20 mA range, allowing voltage and current transmitters to share one module.

A 16-bit delta-sigma conversion path and 60 ms step response characterize 1746-NI4. Because the channels are differential, shield treatment, reference potential, transmitter power, and the voltage-or-current selection must match the field loop rather than a neighboring channel.

Engineering records for 1746-NI4 should preserve the channel mode, scaling, raw-value limits, alarm handling, terminal-block wiring, cable shield, and 5 V/24 V backplane load. Commissioning should use known input values across the required operating range instead of a single zero check.
Alternative Names
1746NI4 1746 NI4 SLC Four-Channel Analog Input 1746-NI4 Analog Module
Technical notes
Channel mode is the first commissioning boundary for 1746-NI4: every differential input is selected independently for -10…+10 V DC or -20…+20 mA. Confirm the hardware setting, loop reference, transmitter power, shield termination, and scaling before applying a test source; the wrong mode can produce plausible but invalid values.
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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.
Why can 1746-NI4 display a stable value that is still wrong?
A mismatched voltage/current selection or scaling pair can produce plausible readings. Compare the channel mode, test source, raw counts, and engineering-unit endpoints before calibrating the transmitter.
How should a noisy loop on 1746-NI4 be diagnosed?
Compare the input at the transmitter and module, inspect shield termination, routing, loop reference, transmitter supply, grounding, and adjacent switching loads, then test with a known isolated source.
Can 1746-NI4 mix current and voltage inputs on the same module?
Yes. The official data provides individual channel selection, but each channel still needs its own documented wiring, mode, scaling, and acceptance values.
What does the 60 ms response of 1746-NI4 mean for a fast-changing process?
It limits how quickly the measured value follows a step. Compare the required event duration and control response with that behavior before using the module for rapid transient capture.
Which test points should be used after replacing 1746-NI4?
Inject at least low, midpoint, and high values on every channel, then confirm raw data, engineering scaling, alarms, HMI display, and the physical loop response.
What purchasing information is useful for 1746-NI4?
State the exact catalog, quantity, condition, destination, delivery target, required 1746-RT28 terminal block, channel signal types, and clear nameplate and connector photographs.