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We provide 1 year warranty for all remaining parts.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online.
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Amikon offers a wide range of components, products and services related to industrial automation. We have a large surplus of stocks and are also distributors of new products from a variety of quality manufacturers.
Technical specifications for 1771-NOC/B
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Product Model1771-NOC/B
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Product ParametersAnalog I/O Module
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Tariff Code8537101190
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Country of originUSA
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Place of shipmentXiamen, China
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In stock1 unit
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Estimated Shipping Size3x15.2x25.8cm
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ManufacturerAllen-Bradley
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Weight0.75 kg
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Number of Outputs8 Channels
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Output TypeCurrent Output
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Output Range0–25 mA
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Common Industrial Signal4–20 mA
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Output Resolution14-bit
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Typical AC Signal Delay (Off)45 (+/- 15) ms
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Typical DC Signal Delay (Off)50 ms
Description
The Allen-Bradley 1771-NOC/B High Resolution Isolated Analog Output Module is an N-Series intelligent block transfer module designed to interface analog current signals with Allen-Bradley PLC-3 and PLC-5 family programmable controllers. 1771-NOC is specifically engineered for applications requiring accurate current-based control, delivering eight isolated current output channels with high-resolution performance for precise process automation.
1771-NOC/B Cutilizes 14-bit digital-to-analog converters to achieve an output resolution of 3.20 µA/bit across its 0–25 mA output range. 1771-NOC/B supports both BCD and natural binary data formats, with configuration managed through block transfer write (BTW) instructions. 1771-NOC/B requires a single slot in the 1771 I/O chassis and does not require an external power supply, simplifying installation and reducing system complexity.
1771-NOC/B features complete electrical isolation between all eight output channels and between each channel and the backplane. 1771-NOC/BC provides channel-to-channel isolation that protects against ground loops and transient noise, making it ideal for installations where signal integrity is critical.
1771-NOC/B Cutilizes 14-bit digital-to-analog converters to achieve an output resolution of 3.20 µA/bit across its 0–25 mA output range. 1771-NOC/B supports both BCD and natural binary data formats, with configuration managed through block transfer write (BTW) instructions. 1771-NOC/B requires a single slot in the 1771 I/O chassis and does not require an external power supply, simplifying installation and reducing system complexity.
1771-NOC/B features complete electrical isolation between all eight output channels and between each channel and the backplane. 1771-NOC/BC provides channel-to-channel isolation that protects against ground loops and transient noise, making it ideal for installations where signal integrity is critical.
Revisions
Revision Part #
Also known as
Alternative Names
1771-N0C
177INOC
I77I-NOC
1771N0C
I771-NOC
I77IN0C
1771NOC
I771NOC
I77INOC
177I-NOC
I77I-N0C
Information
Overview
Manuals
Application Notes
Product Applications
Power & Safety Requirements
Features:
- Eight Isolated Current Output Channels
- High-Resolution 14-Bit Output Performance
- 0–25 mA Wide Current Output Range
- Flexible Data Format Support
The 1771-NOC/B requires only a single slot in the 1771 I/O chassis, making the 1771-NOC/B a space-efficient solution for expanding analog output capacity in PLC-5 systems. The 1771-NOC/B does not require an external power supply, operating directly from the 1771 I/O chassis backplane power for simplified installation and reduced wiring complexity.
The 1771-NOC/B Allen-Bradley Analog I/O Module may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1771-NOC/B Analog I/O Module Manuals, Datasheets, Drivers, 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.
The 1771-NOC/B operates reliably across an ambient temperature range of 0°C to +60°C. The 1771-NOC/B is part of the Allen-Bradley PLC-5 I/O module family and is compatible with all current Allen-Bradley programmable controllers that support the 1771 I/O structure.
The 1771-NOC/B is widely deployed in process control applications across industries including oil and gas, chemical processing, power generation, and manufacturing where precise analog output control is essential for maintaining process stability and product quality. The 1771-NOC/B is backed by Allen-Bradley's commitment to quality and reliability in industrial automation.
The 1771-NOC/B is available in Series B revision and carries comprehensive international certifications for industrial use. The 1771-NOC/B is configured and programmed through Allen-Bradley PLC-5 programming software, ensuring seamless integration into existing PLC-5 automation environments.
- Chemical/Petrochemical: Controls blending loops, dosing pumps, and hazardous area feed valves
- Water/Wastewater: Manages chemical dosing and variable speed water distribution pumps
- Power Generation: Drives boiler feed valves, air dampers, and turbine speed governors
- Oil/Gas Refineries: Operates pressure regulation valves and pipeline surge-control equipment safely
- Food/Beverage: Regulates pasteurization temperature loops and variable-speed conveyor systems
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Backplane Power: Ensure your power supply can handle the module. The 1771-NOC series draws high backplane current (2.9A at 20mA outputs or up to 3.3A at 25mA outputs).
System Power: Turn off the main system and rack power before removing or inserting any module or wiring assembly.
ESD Prevention: Use an approved grounding wrist strap and touch a grounded metal object before handling the hardware to protect delicate internal logic circuitry.
Technical notes
1771-NOC operates within an ambient temperature range of 0 to 60 °C and storage temperature range of –40 to 85 °C, with humidity tolerance of 5–95% non-condensing. 1771-NOC includes output overvoltage protection rated at 140 VAC RMS continuous and output impedance greater than 1 MΩ, ensuring robust performance in harsh industrial environments. 1771-NOC is classified as an earlier model in the PLC-5 product family and remains a reliable solution for legacy systems requiring high-resolution isolated analog current output control.
FAQs
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What type of module is this?
+It is a high-resolution, isolated analog output module that delivers 8 current outputs ranging from 0-25 mA. -
What data formats does the module support?
+The 1771-NOC outputs data using either Binary or Binary Coded Decimal (BCD) formats. -
How do I connect wiring to the 1771-NOC without disconnecting everything?
+You make connections to the module through the field wiring arm (catalog no. 1771-WC). This arm pivots on the I/O chassis and acts as a terminal strip, allowing you to remove the module from the chassis for maintenance without disconnecting any field wiring. -
What are the primary output specifications?
+The module features 8 isolated current channels with an output range of 0 to 25 mA supporting both BCD and Natural Binary data formats.
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