Allen-Bradley 1791-OA16 Block I/O 16-Channel AC Output Module

1791-OA16 Allen-Bradley Block I/O Digital AC Output Module

The 1791-OA16 stands as a high-performance digital AC output solution within the Allen-Bradley 1791 Block I/O product line.
Engineers utilize this compact module to drive critical electrical loads while reducing complex wiring runs in industrial environments.
This unit integrates seamlessly with legacy controllers to provide reliable distributed control near your field-side equipment.

Core Technical Specifications

• Manufacturer: Allen-Bradley
• Model Number: 1791-OA16
• Module Type: Digital AC Output Block
• Output Channels: Sixteen (16) points organized in two groups of eight
• Operating Voltage: 20-132V AC at a frequency of 47-63 Hz
• Nominal Voltage: 120V AC with 85-132V AC external power requirement
• Signal Delay (ON): 1.0 ms delay at both 50 Hz and 60 Hz frequencies
• Signal Delay (OFF): 8.3 ms at 60 Hz or 10.0 ms at 50 Hz
• Max On-State Current: 50 mA minimum per output for stable load activation
• Surge Current: 10 A for 50 ms duration repeatable every two seconds
• Isolation Rating: 1250V AC between I/O groups and internal logic circuits
• Product Weight: 1.19 lbs (0.54 kg) providing a lightweight footprint for panels

Installation and Thermal Performance

• Mount the 1791-OA16 in either vertical or horizontal orientations to fit specific panel space requirements.
• Vertical mounting supports 600 mA at 30°C or 300 mA at 60°C maximum output.
• Horizontal mounting supports 300 mA at 30°C or 150 mA at 60°C maximum output.
• Use 14 AWG stranded wire with 3/64-inch insulation for all signal terminations on the block.
• Leverage the removable terminal strip to simplify module replacement without disconnecting individual field wires.
• Connect the module to PLC-2, PLC-3, or PLC-5 processors via the Remote I/O link.

Package Contents and Shipping

• One (1) New or Refurbished Allen-Bradley 1791-OA16 Block I/O Module.
• One (1) Removable Terminal Strip for easy field wiring and maintenance.
• Protective industrial packaging to prevent electrostatic discharge or physical damage during transit.
• Fast global delivery via FedEx, UPS, or DHL express shipping services.

Frequently Asked Questions (FAQ)

• Which controllers support this specific Block I/O module?
  This module functions with PLC-2, PLC-3, and PLC-5/20 or larger PLC-5 processors.
• How do I troubleshoot output errors on the 1791-OA16?
  Check the integrated status indicators to identify power faults or communication errors immediately.
• Can I use this module for high-speed switching applications?
  The 1.0 ms turn-on delay suits most relays and contactors but verify your cycle times.
• What is the best way to choose between Block I/O and Rack I/O?
  Select Block I/O when you need to save space and minimize long-distance sensor cable costs.
• How do I reach technical support for wiring inquiries?
  Contact info@oiltechcontrols.com or message +86 158 8020 0923 for expert assistance.

Author: Oiltech Controls

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