AB 1771-NOC/B
AB 1771-NOC/B
AB 1771-NOC/B
AB 1771-NOC/B
AB 1771-NOC/B
AB 1771-NOC/B
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1771-NOC/B

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Allen-Bradley 1771-NOC/B is a Series B high-resolution isolated analog output module for PLC-5 systems, with eight field channels labelled 4–20 mA.
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Technical specifications for 1771-NOC/B

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1771-NOC/B
  • Product Family:
    PLC-5
  • Product Type:
    High Resolution Isolated Analog Output Module
  • Stock:
    1
  • Number of Outputs:
    8
  • Output Range:
    0 to 25 mA
  • Digital-to-Analog Resolution:
    14-bit
  • Backplane Current Load at 5 V DC:
    2.9 A at 20 mA per output; 3.3 A at 25 mA per output
  • Chassis Compatibility:
    1771-A1B, 1771-A2B, 1771-A3B, 1771-A3B1, 1771-A4B, later universal chassis, 1771-AM1, and 1771-AM2
  • Remote Termination Panel:
    1771-RTP3 fused or 1771-RTP4 unfused
  • Output Resolution:
    3.20 µA per bit
  • Output Channels:
    8, electrically isolated from each other and from the backplane
  • Chassis Slots:
    1
  • Remote Termination Cable:
    1771-NC6, 1.83 m; or 1771-NC15, 4.57 m
  • 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 Control Remote Wiring PLC-5 Integration Application
  • Verify the complete 1771-NOC/B nameplate before treating the unit as a Series B replacement
  • Rockwell Automation documents the base 1771-NOC as an eight-output high-resolution isolated analog module
  • Preserve the PLC-5 block-transfer configuration and remote termination arrangement while revision evidence is pending

Allen-Bradley 1771-NOC/B is a Series B-marked 1771-NOC module whose exact revision-specific differences require direct manufacturer evidence.

Rockwell Automation's base 1771-NOC manual documents an eight-output high-resolution isolated analog output module for 1771 I/O and PLC-5 applications using block-transfer programming and remote termination.

The located direct official manual does not state the /B revision differences. Confirm the full installed label or an exact Rockwell revision record before treating 1771-NOC/B as a direct replacement.

Availability, condition, price, and shipping time for 1771-NOC/B are confirmed during quotation.

Allen-Bradley 1771-NOC/B High Resolution Isolated Analog Output Module Manuals, Product Family, Links

Important Notice: Other accessories, manuals, cables, termination hardware, calibration data, software, and configuration files are not included unless listed in the stock-item description. All prices are shown in USD.

  • The 1771-NOC configuration identifies an eight-output module
  • Output configuration data is written through PLC block-transfer instructions
  • N-series digital-to-analog conversion uses 14-bit resolution
  • N-series modules connect to a remote termination panel
  • 1771-NC6 and 1771-NC15 are documented cable choices for the remote arrangement
  • Cable A and Cable B identify the two field connector groups on the supplied unit
  • The module occupies one compatible 1771 I/O chassis slot
  • 1771-A1B, A2B, A3B, A3B1, A4B, AM1, and AM2 chassis are documented for N-series use
  • No external power supply is required by the documented N-series module arrangement
  • PLC-5 control systems requiring configured analog output commands
  • Field loops using the installed eight-channel 4–20 mA output arrangement
  • Legacy 1771 N-series systems using remote field termination panels
Description
1771-NOC/B is a Series B-marked 1771-NOC module.

Rockwell Automation's base 1771-NOC manual identifies an eight-output high-resolution isolated analog output module for the 1771 I/O and PLC-5 platform using block-transfer programming and remote termination.

The located direct official manual does not define /B revision-specific electrical, firmware, or replacement differences. Confirm the complete installed nameplate or obtain a Rockwell Automation revision record before treating 1771-NOC/B as a direct Series B replacement.
Alternative Names
1771-NOC/B 1771 NOC/B 1771 NOC B 1771NOC/B 1771NOCB Allen-Bradley 1771-NOC/B
Technical notes
Allen-Bradley 1771-NOC/B must be verified from the installed Series B label. Rockwell Automation’s base 1771-NOC manual does not define /B-specific hardware, firmware, or replacement differences; confirm the exact revision record before treating it as a direct 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.
Does Allen-Bradley 1771-NOC/B include the remote termination panel and cables?
No. Confirm the installed termination panel, Cable A and Cable B arrangement, and any required 1771-NC6 or 1771-NC15 cable before ordering.
What evidence is required before treating Allen-Bradley 1771-NOC/B as a Series B replacement?
Confirm the complete Series B nameplate or obtain a Rockwell Automation revision record that explicitly covers 1771-NOC/B. The available 1771-NOC manual does not define /B hardware or firmware differences, so it cannot alone prove direct replacement compatibility.
Why can Allen-Bradley 1771-NOC/B appear healthy while a field device does not follow its command?
The module can communicate while output scaling, block-transfer data, field-loop continuity, reference wiring, or the receiving device configuration remains incorrect.
What should be reviewed if Allen-Bradley 1771-NOC/B output behaviour changes after a PLC fault or restart?
Review the configured reset values, block-transfer logic, controller fault handling, downstream device response, and the machine’s documented safe-state requirements.
Can Allen-Bradley 1771-NOC/B be selected from the PLC-5 chassis model alone?
No. Confirm the 1771 chassis and processor block-transfer support from the base manual, then separately verify the exact /B label, revision, remote termination hardware and saved application before ordering.
Why should Allen-Bradley 1771-NOC/B retain the existing remote termination arrangement?
It preserves the established terminal assignment, cable grouping, shielding method, and field-loop documentation. Changing it can introduce wiring or scaling errors.
What information should be supplied when ordering Allen-Bradley 1771-NOC/B?
Provide clear photographs of the complete nameplate showing 1771-NOC/B and its Series marking, the 1771 chassis and processor catalog numbers, remote termination and cable identities, and the saved block-transfer configuration. Series B-specific compatibility remains pending without an exact Rockwell revision record.