Allen-Bradley Diagnostic DC Output Module 1794-OB16D | 16-Point

Description

Allen-Bradley 1794-OB16D Flex I/O 16-Point Diagnostic DC Output Module

The Allen-Bradley 1794-OB16D brings advanced diagnostics to the FLEX I/O system from Rockwell Automation. This 24V DC output module features 16 non-isolated points for high-density control. It actively monitors for open wires and short circuits in your field devices. This capability significantly reduces troubleshooting time and prevents machine downtime. The module connects seamlessly to various networks like EtherNet/IP and DeviceNet. You can hot-swap it without powering down your entire control system.

Core Technical Specifications & Data

• Brand: Allen-Bradley | Model: 1794-OB16D
• Product Type: Diagnostic DC Output Module for Flex I/O
• Number of Outputs: 16 Non-isolated, Current Sourcing Channels
• Output Voltage: 24V DC Nominal (10 – 31.2V DC Range)
• Output Current Rating: 8.0A Total (500mA per channel maximum)
• Off-state Leakage Current: 0.5mA maximum per channel
• Output Signal Delay: 0.5 ms typical (On to Off / Off to On)
• Isolation Voltage: 50V DC
• Power Dissipation: 4.8W maximum at 31.2V DC
• Flexbus Current: 60mA @ 5V DC
• Communication Options: EtherNet/IP, DeviceNet, ControlNet, Remote I/O

Environmental Ratings & Durability

• Operating Temperature: 0 to 55 °C (32 to 131 °F)
• Storage Temperature: -40 to 85 °C (-40 to 185 °F)
• Relative Humidity: 5% to 95% (non-condensing)
• Vibration Immunity: Meets IEC 60068-2-6 standards
• Shock Resistance: Complies with IEC 60068-2-27
• Noise Immunity: High noise immunity per IEC 61000-6-2

Comparison With Related Products

• For isolated relay outputs, consider the 1794-OW8XT module.
• You will need a power supply like the 1794-PS13 to run the system.

Frequently Asked Questions (FAQ)

• What diagnostic faults does this module detect?
  It detects and reports open load and short circuit conditions on each output.
• Can I use this module in a DeviceNet network?
  Yes, the 1794-OB16D is compatible with DeviceNet via a suitable adapter.
• What is the maximum inrush current per output?
  Each output can handle an inrush current of up to 1.0A for 100 milliseconds.
• Does it require an external fuse for protection?
  We recommend using external fusing for each output channel or group of channels.
• Is this module suitable for high-speed switching applications?
  With a 0.5ms switching delay, it is suited for general-purpose, not high-speed, applications.

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