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PRODUCT DESCRIPTION
Eight-channel analog current output for legacy 1771 systems
Allen-Bradley 1771-NOC/B identifies a listed Series B 1771-NOC isolated analog output module. The manufacturer describes eight current-output channels interfacing with compatible PLC-3 and PLC-5 block-transfer systems through a 1771 chassis and the appropriate remote termination hardware.
The reviewed specifications apply to the documented 1771-NOC product family; no unverified Series B differences are asserted. Before replacement, check the installed module label, termination panel, cable, output scaling and controller program, then validate the connected analog loads and configured fault response.
The reviewed specifications apply to the documented 1771-NOC product family; no unverified Series B differences are asserted. Before replacement, check the installed module label, termination panel, cable, output scaling and controller program, then validate the connected analog loads and configured fault response.
BEFORE YOU BUY
Confirm the complete installed configuration
ACTUAL APPLICATIONS
Application context for 1771-NOC/B
1771-NOC/B is an Isolated analog current output module for compatible Allen-Bradley ControlLogix systems. Its application context includes automotive, food and beverage, water and wastewater. Compatibility depends on the full model, revision, interfaces and configuration.
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01 · AUTOMOTIVE
Automotive Vehicle and Component Manufacturing
Automotive Body ManufacturingVehicle Component Production -
02 · FOOD & BEVERAGE
Food Processing and Beverage Manufacturing
Food Processing and PackagingBeverage Production and Bottling -
03 · WATER & WASTEWATER
Municipal Water and Wastewater Treatment
Drinking Water ProductionMunicipal Wastewater Treatment
Technical specifications for 1771-NOC/B
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Product Model1771-NOC/B
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Product ParametersIsolated analog current output module
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In stock1 unit
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ManufacturerAllen-Bradley
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Output channelsEight independently isolated current outputs
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Output range0 to 25 mA; supports the documented 4 to 20 mA application range
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Output resolution3.2 microampere per bit in the documented current-output range
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Permitted loadUp to 1 kohm at 20 mA; up to 700 ohm at 25 mA
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Backplane demand at 5 V2.9 A and 14 W at 20 mA outputs; 3.3 A and 16 W at 25 mA
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Module update time25 ms maximum
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D/A settling time500 microseconds for a 10 percent full-scale change into a resistive load
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Chassis occupancyOne 1771 I/O module slot
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Controller interfaceBlock-transfer programming for compatible PLC-3 and PLC-5 systems
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Field termination cables1771-NC6 six-foot or 1771-NC15 fifteen-foot cable to appropriate RTP
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Operating temperature0 to 60 degrees C; observe ambient-change performance limitations
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Calibration intervalOne year in the general module specification
View all additional
Alternative Names
Allen-Bradley 1771-NOC Series B
1771-NOC/B current output module
1771 NOC B isolated analog output
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
1771-N ANALOG OUTPUT
Preserve the current loop and block-transfer configuration
Use the exact listed NOC/B identity to confirm the installed unit. The manufacturer base-catalog data establishes a current-output module, not a digital I/O board or a ControlLogix plug-in module.
Check the 1771 chassis power budget at the required output current and verify the remote termination panel and cable. Confirm each load resistance against the documented current capability.
Restore the controller block-transfer configuration and test scaling, ramping and fault behavior. Use the complete applicable manual for isolation, wiring and commissioning precautions.
Features:
- Current-output identity
- 1771 chassis and termination
- Configured output validation
The Allen-Bradley 1771-NOC/B requires a controlled system review before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
The official 1771-NOC base-catalog record states discontinuation on May 31, 2017 with an Engineering Replacement category. This is not a verified Series B-specific successor statement.
The official 1492 conversion instructions describe retaining suitable 1771 remote termination panels while using the specified conversion cables and 1756 I/O hardware. Wiring and signal compatibility must be checked for the actual configuration.
A migration also requires a compatible chassis, controller and application configuration. Do not describe a 1756 analog module as a direct physical replacement for 1771-NOC/B or assume unchanged program behavior.
Features:
- Base catalog discontinued May 31, 2017
- Engineered termination conversion
- No direct chassis interchangeability
The Allen-Bradley 1771-NOC/B requires replacement verification against the complete installed configuration and current manufacturer documentation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Amikon is an independent supplier. Consult the applicable Rockwell Automation documentation and installed configuration before selection, installation or replacement.Features:
- Exact-model reference documents
- Hardware and system compatibility checks
- Accessories are supplied only when listed in the quotation
Documentation for the Allen-Bradley 1771-NOC/B supports document applicability checks before installation or replacement.
Also searched as
Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed sizePacked dimensions unconfirmed
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Shipping weightGross weight unconfirmed
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS referenceClassification unconfirmed
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OriginUSA; base catalog, verify unit label
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
Antistatic protection -
Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 1771-NOC/B
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Can 1771-NOC/B measure an analog input signal?
No. The NOC catalog is the eight-channel current-output module. Input-module functions and voltage-output ratings must not be substituted for its documented current outputs. -
Can each channel drive a one-kilohm load at 25 mA?
No. The manual allows up to one kilohm at 20 mA, but reduces the permitted load to 700 ohms at 25 mA. Check the complete loop resistance at the required output current. -
Does this module fit directly into a ControlLogix chassis?
No. It is a 1771 I/O module. Migration to 1756 ControlLogix requires an engineered I/O and termination conversion, not insertion into a different chassis. -
Why does the backplane power budget change with output current?
The manual lists 2.9 A at 5 V and 14 W for 20 mA outputs, increasing to 3.3 A and 16 W at 25 mA. Include the intended output condition in the chassis power calculation. -
Which program data must be preserved for replacement?
Retain the block-transfer configuration, channel scaling, clamp and ramp settings and programmed fault behavior. The manual notes that N-series channel data and status organization differs from ordinary dedicated I/O layouts. -
Has the 1771-NOC catalog been discontinued?
Yes. The official base-catalog record gives May 31, 2017 and classifies replacement as engineering work. No unverified Series B-specific lifecycle date or automatic successor is asserted. -
Does the B suffix prove interchangeability with another series?
No. The listing retains the supplied B identifier, but the reviewed documents do not establish a Series B-to-other-series interchangeability matrix. Verify the actual label and applicable manufacturer guidance before changing series.
READY TO VERIFY YOUR PART?
Get a 1771-NOC/B quote with price, lead time and revision check.
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