AB 1746-NI8
AB 1746-NI8
AB 1746-NI8
AB 1746-NI8
AB 1746-NI8
AB 1746-NI8
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  • Lifecycle status

    Discontinued
    Discontinued date: 2024-09-30

1746-NI8

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Allen-Bradley 1746-NI8 is an eight-channel SLC 500 analog input module with independently selectable voltage or current operation for each channel.
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Technical specifications for 1746-NI8

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-NI8
  • Product Family:
    SLC 500
  • Product Type:
    SLC 500 Eight-Channel Analog Input Module
  • Stock:
    1
  • Channels:
    8 analog inputs
  • Channel configuration:
    Voltage or current selected independently by channel
  • Supported voltage ranges:
    ±10 V, 1 to 5 V, 0 to 5 V, 0 to 10 V
  • Supported current ranges:
    0 to 20 mA, 4 to 20 mA, ±20 mA, 0 to 1 mA
  • Conversion:
    16-bit A/D
  • Resolution:
    1 mV or 1 µA
  • Input filtering:
    1, 2, 5, 10, 20, 50 or 75 Hz
  • Input-to-backplane isolation:
    500 VAC / 710 VDC for 60 seconds on current product data
  • Backplane current:
    200 mA at 5 VDC; 100 mA at 24 VDC
  • Power dissipation:
    3.4 W maximum
  • Operating temperature:
    0 to +55°C in any I/O slot except 0; up to +60°C in the rightmost slot(s)
  • Storage temperature:
    -40 to +85°C
  • Relative humidity:
    5 to 95%, non-condensing
  • Dimensions:
    3.46 × 14.45 × 13.02 cm
  • Weight:
    0.3 kg
  • Tariff Code:
    8538900000
  • Country of origin:
    USA
  • 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 Signal Setup Wiring & Grounding Diagnostics Application
  • Configure every 1746-NI8 channel for the documented voltage or current source
  • Keep field commons, shields and external transmitter power within the approved design
  • Preserve switch settings, software ranges, scaling and filter values before replacement

Allen-Bradley 1746-NI8 is an eight-channel SLC 500 analog input module with independently selectable voltage or current operation on each channel.

Allen-Bradley 1746-NI8 is an eight-channel SLC 500 analog input module with independently selectable voltage or current operation for each channel. 1746-NI8 is the complete catalog number. Official conformity documentation identifies Series 1 hardware; the current Rockwell lifecycle page lists the catalog as discontinued.

Before installation or replacement, verify the complete nameplate, compatible companion hardware, wiring or network design, saved configuration and commissioning plan.

Availability, condition, price, and shipping time for 1746-NI8 are confirmed during quotation.

Allen-Bradley 1746-NI8 SLC 500 Eight-Channel 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.

  • Set each channel's voltage/current switch before applying the source
  • Select the matching software range and data format
  • Provide external loop power for transmitters that require it
  • Use the 1746-RT25G removable terminal block
  • Use shielded twisted-pair cable such as Belden 8761 or equivalent
  • Ground each cable shield at the single approved end
  • Compare hardware switches with the downloaded channel configuration
  • Check open-circuit, overrange and underrange status for each used input
  • Use the selected digital filter to balance response time and noise rejection
  • Acquiring mixed voltage transmitters and sensors in an SLC 500 chassis
  • Measuring externally powered 0–20 mA or 4–20 mA process loops
  • Providing engineering-unit or PID-scaled analog data to SLC 500 control programs
Description
1746-NI8 is an eight-channel SLC 500 analog input module whose channels can be configured independently for supported voltage or current ranges.

Selection must match the 1746-RT25G terminal block, hardware switch positions, software ranges, scaling, filtering, grounding and external loop-power design.

Before replacement, record every channel source, switch setting, data format, scale, filter, wiring, shield termination and active status bit.
Revisions

Revision Part #

Also known as

1746-NI8 Ser A
1746-NI8/A, Series A, Rev A
Alternative Names
1746-NI8 1746 NI8 1746NI8 Allen-Bradley 1746-NI8 AB 1746-NI8 SLC 500 1746-NI8 1746-NI8/A 1746-NI8 Series A
Technical notes
1746-NI8 provides eight backplane-isolated analog inputs, but its field channels are not isolated from one another. Match every channel's DIP-switch mode, software range, wiring common and external transmitter supply before replacement.
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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.
Can 1746-NI8 mix voltage and current signals in the same module?
Yes. Each channel is selected independently, but the hardware switch position and software range must agree before the channel is commissioned.
Are the field channels on 1746-NI8 individually isolated?
No. The input group is isolated from the backplane, but the channels are not isolated from one another; plan commons and grounding accordingly.
Can 1746-NI8 power a two-wire 4–20 mA transmitter?
No. The module measures the current signal but does not provide transmitter loop power; use a compatible external supply and observe loop polarity.
Can 1746-NI8 replace another SLC 500 analog module without program changes?
Not automatically. Compare channel count, input image, class/configuration data, ranges, scaling, filters, terminal block and field wiring.
Which termination and shielding practices matter for 1746-NI8?
Use the correct 1746-RT25G terminal block, shielded twisted-pair cable and a single approved shield-ground point while keeping signal commons within limits.
Why can a 1746-NI8 channel be unstable or saturated?
Check switch/configuration mismatch, open wiring, loop supply, polarity, common-mode voltage, shielding, filter selection, signal range and data scaling.
How should 1746-NI8 be commissioned?
Inject traceable voltage or current into every used channel, verify range, scaling, filtering, status bits and alarms, then compare readings with the approved project record.