Allen-Bradley 1791-OB16
Allen-Bradley 1791-OB16
Allen-Bradley 1791-OB16
Allen-Bradley 1791-OB16
Allen-Bradley 1791-OB16
Allen-Bradley 1791-OB16
Ask our team:
  • Phone: +86 181 0690 9650
  • E-Mail sales1@apterpower.com

1791-OB16

/ 4.9
1001 reviews | Need a Specific Revision?
The Allen-Bradley 1791-OB16 DC output module is designed to manage a variety of output applications for external DC power supplies, with connections ranging from 19.2 to 30 volts.
Get a quick price for 1791-OB16
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for 1791-OB16

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1791-OB16
  • Product Family:
    1791 Block I/O
  • Number of Outputs:
    16 Outputs
  • Nominal Output Voltage:
    24 VDC
  • Output Voltage Range:
    10–30V DC
  • External DC Power Range:
    19.2–30V DC
  • Max. Output Current (Vertical):
    500 mA
  • Max. Output Current (Horizontal):
    250 mA
  • Min. On-State Current:
    1.0 mA per Output
  • Max. Off-State Leakage Current:
    0.5 mA
  • Weight:
    0.1 kg
  • Estimated shipping dimensions:
    9.3x5x5.5cm
  • 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 Operating Environment Safety & Compliance

Features:

  • Interface Between the DC Output Control System and Industrial Field Devices
  • Combines Capability of High-Density Output Switching with Remote I/O Integration
  • Operates in Conjunction with Allen-Bradley PLC Systems and Universal RIO Networks
The Allen-Bradley 1791-OB16 functions as a DC Output Block I/O module in distributed control architectures, delivering reliable 24 VDC switching capability to field-mounted actuators and indicators. It continuously manages 16 discrete output channels (10-30 VDC range) and transmits status data through the Universal Remote I/O link to support real-time control of solenoids, motor starters, and status lights. Seamless communication is standard with the 1791-OB16, however utilizing its compact block I/O design will allow significant reduction in wiring runs back to central control cabinets. The 1791-OB16 has established a versatile footprint in industrial automation by incorporating flexible mounting orientations and robust electrical isolation within distributed I/O networks.

The 1791-OB16 provides essential output functions common to remote I/O stations, and is a critical component of the control execution path, directly affecting the proper, normal operation of field-level automation processes. One or multiple 1791-OB16 modules are deployable per remote I/O station depending on the required output density. The 1791-OB16 occupies a compact block form factor in the installation and is typically mounted in proximity to the controlled equipment to minimize field wiring lengths.

For High-Current Output applications, the 1791-OB16 module delivers 500 mA per channel in vertical orientation (250 mA horizontal), accommodating demanding load requirements. In addition to standard discrete output operation, the 1791-OB16 configuration also maintains minimal leakage current. The 1791-OB16 output circuitry executes switching using the solid-state design specified in the module specifications. Using this method, the output system continually maintains a minimum on-state current of 1.0 mA per channel. If the system detects output status changes, it will automatically update the RIO link communication and reflect the current state in the PLC processor data table.

The 1791-OB16 Allen-Bradley DC Output Block 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 1791-OB16 DC Output Block 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 1791-OB16 DC Output Block I/O Module Specs

General

  • Manufacturer Allen-Bradley
  • Model 1791-OB16
  • Condition New Original ready stock
  • Product Family 1791-0B16,1794-OB16,1794-OB16P,1794-OB16D
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.
  • Remote I/O Expansion: Used to extend a PLC system's control to remote locations without requiring a full I/O rack or local power supply.
  • Discrete Device Control: Ideal for driving low-power 24V DC devices such as: Solenoids and actuators.Pilot lights and status indicators.Small DC relays or motor starters.
  • Distributed Control Systems: It can serve as a standalone I/O solution or part of a larger Universal Remote I/O (RIO) network for PLC-5 or SLC 500 controllers.
  • Temperature: Operating range of 0°C to 60°C (32°F to 140°F).
  • Vertical Mounting: Maximum output current of 500 mA per point.
  • Horizontal Mounting: Derated to 250 mA per point to ensure proper heat dissipation.
  • Ventilation: Requires a minimum 2.0-inch (50.8 mm) clearance on all sides for airflow.
  • Protection: Rated for Pollution Degree 2 industrial environments; must be installed within a protective enclosure.
  • Electrical Isolation: Provides 500V AC isolation to protect internal logic from field-side electrical noise.
  • Hazardous Locations: Suitable for Class I, Division 2, Groups A, B, C, and D hazardous environments (non-incendive rating).
  • Grounding: Includes a dedicated grounding stud; must be properly torqued to 15 in-lbs to maintain safety standards.
  • Protection: External fusing is recommended for all outputs to prevent damage from short circuits or overcurrent.
Description
The Allen-Bradley 1791-OB16 module is classified as a DC output block I/O component designed to manage diverse output applications. The 1791-OB16 encompasses a total of 16 outputs, allowing it to support various control tasks effectively. Operating primarily at a nominal output voltage of 24 VDC, the 1791-OB16 also accommodates a voltage range of 10 to 30 volts DC. For external DC power supply, the 1791-OB16 requires connections within a range of 19.2 to 30 volts DC.

The output performance of the 1791-OB16 is significant, with the capability to deliver a maximum output current of 500 mA in a vertical orientation and 250 mA in a horizontal setup. Each output on the 1791-OB16 is designed to maintain a minimum on-state current of 1.0 mA, ensuring reliable operation with a maximum off-state leakage current of only 0.5 mA. The isolation voltage rating of the 1791-OB16 reaches up to 500V AC, offering enhanced protection against electrical interference in various installations. Communication with other devices through the Universal Remote I/O (RIO) link enhances system compatibility and integration for the 1791-OB16. This 1791-OB16 module is engineered to function within a temperature range of 0°C to 60°C, making it well-suited for standard operational environments.

The Allen-Bradley 1791-OB16 is specifically designed for industrial automation environments where reliable DC output control is essential. This 1791-OB16 module is ideal for manufacturing facilities requiring precise control over solenoid valves, motor starters, indicator lights, and other DC-powered actuators. The 1791-OB16 addresses the challenge of managing multiple output devices in distributed I/O applications, eliminating the need for extensive wiring runs back to a central control cabinet. By utilizing the RIO communication protocol, the 1791-OB16 enables seamless integration into Allen-Bradley PLC systems, reducing installation complexity and improving system response times. This 1791-OB16 block I/O module solves the problem of limited I/O capacity in remote locations, providing a cost-effective solution for expanding control capabilities without adding additional PLC racks. The robust electrical isolation of the 1791-OB16 ensures reliable operation in electrically noisy industrial environments, protecting sensitive control signals from interference and ground loop issues.
Revisions

Revision Part #

Also known as

1791-OB16 Ser A
1791-OB16/A, Series A, Rev A
1791-OB16 Ser B
1791-OB16/B, Series B, Rev B
Alternative Names
1791 OB16 1791-0B16 1794-OB16 1794-OB16P 1794-OB16D
Exceptional Service

Our Mission

  • 100% Satisfaction

    We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.
  • Trust Guaranteed

    Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.
  • Expertise

    Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

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 1791-OB16 module?
The 1791-OB16 is a DC output Block I/O module from Allen-Bradley, designed to handle multiple output control tasks in industrial automation systems.
What are the on-state and off-state characteristics?
Each output requires a minimum on-state current of 1.0 mA for reliable operation, while the off-state leakage current is limited to a maximum of 0.5 mA.
What are the advantages of using the 1791-OB16 in distributed I/O systems?
The module reduces the need for long wiring runs to central cabinets, expands I/O capacity in remote locations, simplifies installation, and improves system response time through RIO communication.

Product Browsing History