AB 1746SC-NO8I
AB 1746SC-NO8I
AB 1746SC-NO8I
AB 1746SC-NO8I
AB 1746SC-NO8I
AB 1746SC-NO8I
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1746SC-NO8I

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Spectrum Controls 1746SC-NO8I is an eight-channel current-output module for Allen-Bradley SLC 500 control systems.
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Technical specifications for 1746SC-NO8I

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746SC-NO8I
  • Product Family:
    SLC 500
  • Product Type:
    8-Channel Analog Current Output Module
  • Stock:
    1
  • Output Channels:
    8 single-ended current outputs
  • Selectable Current Ranges:
    4…20 mA, 0…20 mA, 0…21 mA, and 0…21.5 mA
  • Selectable Data Formats:
    Engineering units, scaled for PID, proportional counts, 1746-NO4 format, and user-defined scale
  • Output Load Range:
    0…500 Ω
  • Output Step Response:
    1 ms to 95% of full scale
  • Channel Update:
    5 ms for all channels in Class 1; 10 ms in Class 3
  • Output Resolution:
    16 bit; 366 nA/count
  • Overall Accuracy:
    0.1% full scale at 25°C; 0.2% at 60°C
  • Isolation:
    500 V DC field wiring to backplane
  • Backplane Current:
    120 mA at 5 V DC and 250 mA at 24 V DC
  • Optional External Supply:
    24 V DC ±10%, NEC Class 2
  • Module ID Codes:
    3527 Class 1; 12727 Class 3
  • Operating Temperature:
    0…60°C
  • Dimensions:
    3.6 × 13.0 × 14.5 cm
  • Weight:
    0.26 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 Output Setup Protection Functions Power and Wiring Application
  • Map each field loop to its required current range and operating class
  • Select the internal backplane or optional external 24 V DC power arrangement
  • Record the J4 position and safe-state values before exchanging the module

1746SC-NO8I commissioning centers on matching each field loop to its configured output range and operating class before the module is placed in service.

Choose the backplane or external 24 V DC supply arrangement first, then retain the documented Class 1 or Class 3 image size and module ID in the SLC 500 project.

For replacement, compare the saved scaling, clamp, ramp, alarm, and fault-value settings with the connected load, J4 position, and field wiring.

Availability, condition, price, and shipping time for 1746SC-NO8I are confirmed during quotation.

Spectrum Controls 1746SC-NO8I Manuals, Product Family, 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.

  • Configure each channel independently for 4–20 mA, 0–20 mA, 0–21 mA, or 0–21.5 mA output
  • Select engineering units, PID, proportional-count, 1746-NO4, or user-defined data format to match the SLC program
  • Retain the documented module ID and Class 1 or Class 3 image size when rebuilding the slot configuration
  • Per-channel output clamping limits the commanded signal
  • Limit alarms report configured threshold conditions
  • Preset fault values and ramping support controlled failure behavior
  • J4 selects backplane or external 24 V power
  • External power must meet the documented Class 2 requirement
  • Each current loop must stay within the specified load resistance
  • Eight-loop 4…20 mA valve or actuator command
  • Multi-channel current reference for variable-speed drive and process equipment
  • PID-loop current output with scaling, limits, and controlled fault values
Description
1746SC-NO8I expands an SLC 500 rack with eight independently configured analog current commands in one module position.

Class 1 and Class 3 operating modes provide different image sizes, while Class 3 exposes the documented scaling, clamping, alarm, ramping, and preset-fault features.

Before replacement, capture every channel configuration, output load, J4 position, 24 V source, module ID, wiring label, and safe-state requirement.
Alternative Names
1746SC-NO8I 1746sc-NO8I 1746sc-NO8i 1746 SC NO8I 1746SCNO8I Spectrum Controls 1746sc-NO8I SLC 500 1746sc-NO8I
Technical notes
1746SC-NO8I requires matched class, module ID, J4 power selection, current ranges, scaling, clamps, and fault values; configuration mismatch can hold outputs off or miscommand loops.
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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.
How can a buyer avoid ordering the wrong replacement for Spectrum Controls 1746SC-NO8I?
Match the complete 1746SC-NO8I nameplate and current-output function. Do not substitute the different Allen-Bradley 1746-NO8I or the Spectrum Controls voltage-output model by appearance alone.
Can Spectrum Controls 1746SC-NO8I replace a voltage-output module without wiring changes?
No. The connected receivers, field wiring, program scaling, and commanded signal type must all be designed for current output; a voltage-output installation is not a drop-in match.
What should be confirmed before choosing the power arrangement for Spectrum Controls 1746SC-NO8I?
Identify the existing J4 position, chassis power loading, and whether a documented external Class 2 supply is present before moving the jumper or reconnecting field power.
What must be restored after replacing Spectrum Controls 1746SC-NO8I?
Restore the operating class, module ID, range, data format, scaling, clamps, alarms, ramping, fault value, and output commands for every channel.
Can the existing field wiring be reused with a replacement Spectrum Controls 1746SC-NO8I?
Reuse it only after confirming terminal assignment, polarity, receiver type, total loop resistance, shield routing, and the saved channel configuration against the exact-model wiring diagram.
Can Spectrum Controls 1746SC-NO8I be moved into any open SLC 500 chassis slot?
No. Preserve the configured I/O location, exclude slot 0, recalculate backplane loading, and confirm that the processor profile and output image still address the selected slot.
Why might Spectrum Controls 1746SC-NO8I outputs remain off after replacement?
Check J4, external 24 V availability, class and module ID, channel enable and format, output image data, and any configured fault or clamp values.