Allen-Bradley 1771-NOV
Allen-Bradley 1771-NOV
Allen-Bradley 1771-NOV
Allen-Bradley 1771-NOV
Allen-Bradley 1771-NOV
Allen-Bradley 1771-NOV
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1771-NOV

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The Allen-Bradley 1771-NOV is a high-resolution isolated analog output module engineered to deliver precise control in demanding industrial environments.
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Technical specifications for 1771-NOV

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1771-NOV
  • Product Family:
    PLC-5
  • Product Type:
    N-Series Analog I/O Module
  • Stock:
    7
  • Number of Inputs:
    0 Inputs
  • Number of Outputs:
    8 Outputs
  • Output Type:
    Voltage
  • Output Resolution:
    +/- 10 Volts DC (1.32 Milivolts/bit)
  • RTP Choice:
    Unfused, 1771-RTP4; Fused, 1771-RTP3
  • Backplane Current:
    2.1 Amperes
  • Data Format:
    BDC or Natural Binary
  • Typical AC Signal Delay (Off):
    45 (+/- 15) ms
  • Typical DC Signal Delay (Off):
    50 ms
  • Wiring Arm:
    1771-WH
  • Mounting:
    Rack Mountable
  • Weight:
    0.8 kg
  • Estimated shipping dimensions:
    3x15.2x25.8cm
  • Tariff Code:
    8537101190
  • 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 Specifications Use Cases Environmental Ratings Certifications & Standards

Features:

  • Provides a High-Resolution Analog Interface Between Field Devices and the 1771 I/O Rack Backplane
  • Unites 1000 Volt Channel-to-Channel Isolation with Open Input and Open Loop Detection Capability
  • Coordinates with PLC-5 Processors and Standard N-Series Analog Modules
The Allen-Bradley 1771-NOV N-Series Analog I/O Module operates as the high-resolution isolated analog module in a 1771 I/O rack, providing precise analog signal conversion and 1000 Volt channel-to-channel isolation to all connected modules within the system. It continuously processes incoming analog field signals at 1.32 milliVolts per bit resolution and transmits this high-accuracy data through the rack backplane to support steady state operation of all control and monitoring modules.

The 1771-NOV provides essential analog I/O functions common to the entire rack, and is a critical component of the signal conversion path, directly affecting the proper, normal operation of the overall analog control system. One 1771-NOV module is utilized per analog slot depending on the desired channel configuration.

For isolated analog channel applications, the 1771-NOV system requires proper utilization of its internal 1000 Volt isolation barriers. In addition to standard signal conversion operation, the 1771-NOV also performs continuous open loop detection for thermocouples, RTDs, voltage inputs, and current loops. The 1771-NOV channel architecture executes signal protection using the internal isolation barriers specified in the module design.

The 1771-NOV Allen-Bradley N-Series Analog I/O Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1771-NOV N-Series Analog I/O Module Manuals,Datasheets,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.
Allen-Bradley 1771-NOV N-Series Analog I/O Module Specs

General

  • Manufacturer Allen-Bradley
  • Model 1771-NOV
  • Condition New Original ready stock
  • Product Family 1771-NOC,1771-NIV
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.
  • Control Valve Actuation: Modulating precision control valves in fluid processing and chemical plants.
  • Speed Reference Signals: Providing reliable analog voltage setpoints to variable frequency drives (VFDs) and motor controllers.
  • Process Loop Regulation: Interfacing with pneumatic transducers, dampers, and heating controls.
  • Isolated Multi-Channel Layouts: Managing equipment that demands complete electrical isolation between channels to eliminate ground loops.
  • Operating Temperature: 0°C to 60°C (32°F to 140°F).
  • Storage Temperature: -40°C to 85°C (-40°F to 185°F).
  • Relative Humidity: 5% to 95% (non-condensing).
  • Operational Altitude: Up to 2,000 meters (6,561 feet).
  • Pollution Degree: Rated for Pollution Degree 2 industrial environments.
  • Enclosure Type: Open-type equipment (requires installation inside a tool-accessible industrial enclosure).
  • Electrical Safety: Built in alignment with EN 61131-2 specifications for Programmable Controllers.
  • Hazardous Locations: Compliant with Class I, Division 2, Groups A, B, C, and D standards.
  • Regional Compliance: Carries the CE mark for European Union directives.
  • Agency Approvals: Certified by the Canadian Standards Association (CSA) and Underwriters Laboratories (UL).
Description
The Allen-Bradley 1771-NOV is a High-resolution Isolated Analog I/O Module designed for precision analog signal processing in industrial control environments. This N-Series Analog I/O Module, the 1771-NOV, is specifically engineered to handle high-resolution analog input and output operations while maintaining superior signal integrity across multiple channels. The 1771-NOV delivers an output resolution of 1.32 milliVolts per bit, ensuring exceptionally fine control for sensitive process applications. A defining characteristic of the 1771-NOV is its robust 1000 Volt channel-to-channel isolation, which enables the connection of diverse signal sources to the same module without introducing ground loops or risking component damage from excessive voltage differentials between channels. Furthermore, the 1771-NOV incorporates advanced diagnostic capabilities including open input and open loop detection, allowing it to readily identify open thermocouples, RTDs, voltage inputs, or current loops. The 1771-NOV also features simplified calibration procedures with a recommended calibration interval of one year, reducing maintenance complexity and downtime.

The 1771-NOV finds extensive application across various industrial sectors including process control, manufacturing automation, power generation, and chemical processing industries. In process control applications, the 1771-NOV is ideal for precision temperature monitoring using thermocouples and RTDs, flow control systems, and pressure regulation loops where high-resolution analog measurement is critical. The 1771-NOV is also well-suited for material handling systems, batch processing operations, and continuous manufacturing lines requiring isolated analog I/O to prevent signal interference between different control zones. The exceptional isolation properties of the 1771-NOV make it particularly valuable in mixed-signal environments where multiple ground references exist, such as in large-scale distributed control systems or facilities combining legacy equipment with modern control architectures.

For installation and integration, the 1771-NOV should be mounted in an appropriate Allen-Bradley 1771 I/O chassis as part of a PLC-5 or compatible control system architecture. When installing the 1771-NOV, ensure all field wiring connections are properly terminated and that the module is securely seated in the chassis slot to maintain reliable communication and signal integrity. It is critical to note that connecting or disconnecting cables while power is being applied to the 1771-NOV or any device on the network can result in electrical arcing and subsequent damage to machine components; therefore, all wiring procedures for the 1771-NOV must be performed only when power is completely removed from the system. The 1771-NOV should be configured using compatible programming software to establish proper scaling, range selection, and diagnostic parameters for the specific application requirements.
Revisions

Revision Part #

Also known as

1771-NOV Ser A
1771-NOV/A, Series A, Rev A
1771-NOV Ser B
1771-NOV/B, Series B, Rev B
1771-NOV Ser C
1771-NOV/C, Series C, Rev C
Alternative Names
1771-N0V 177I-NOV 1771NOV 1771N0V 177INOV 1771-NIS 1771-NOC 1771-NIV
Technical notes
The 1771-NOV is designed for reliable operation in harsh electrical environments, meeting the stringent EMC requirements of EN 50081-2 (radiated) and EN 50082-2 (immunity) standards. This ensures stable operation in industrial locations with severe electromagnetic interference, such as manufacturing and power facilities.
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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.
What is the Allen-Bradley 1771-NOV module used for?
The Rockwell Automation Allen-Bradley 1771-NOV is a high-resolution analog output module designed for PLC-5 chassis systems. It provides precise signal conversion and regulation for various industrial control applications, enabling stable interfacing between control systems and field devices.
What is the key electrical isolation feature of the 1771-NOV?
The module offers robust 1000 V channel-to-channel isolation, which prevents ground loops and protects internal electronics from voltage differences between connected signal sources. This makes it suitable for complex industrial environments where multiple signal types are integrated into the same system.
How does the 1771-NOV handle signal diagnostics and maintenance?
It includes built-in diagnostic functions that can detect open thermocouples, RTDs, voltage inputs, and current loops. It also supports a simplified calibration process with a typical one-year calibration interval, helping reduce maintenance time and system downtime.
What safety precautions are required when installing the 1771-NOV?
When integrating the module into a PLC-5 chassis system, it is critical to avoid connecting or disconnecting cables while power is applied. Doing so may cause electrical arcing, which can damage equipment and pose serious safety risks to personnel.