1791-16AC Allen-Bradley Block I/O Module 16 Inputs Outputs

Allen-Bradley 1791-16AC Block I/O Module Overview

Key Technical Specifications

• Manufacturer: Allen-Bradley ensures reliable industrial control.
• Product Type: 1791 Block I/O Series with built-in Remote I/O adapter functionality.
• Part Number: 1791-16AC with UPC 612598124749.
• Input Channels: Sixteen discrete 120VAC inputs with an On-state voltage range of 79 to 132VAC.
• Input Current: Nominal rating of 11 mA with a maximum On-state current of 12.3 mA at 132 Volts.
• Output Channels: Sixteen 120VAC outputs arranged in two isolated groups of eight.
• Output Voltage Range: Each output supports 20 to 132VAC for driving various field devices.
• External Power: Requires 85 to 132VAC, 47-63 Hz with a current draw of 150 mA at 132VAC.
• Frequency Response: Operates at 47 to 63 Hz, compatible with standard AC line frequencies.
• Signal Delays: Features Off to On transition in 1.0 ms and On to Off in 26 ms for inputs.
• Output Transition: Off to On in 1.0 ms; On to Off in 8.3 ms at 60 Hz or 10.0 ms at 50 Hz.
• Power Dissipation: Maximum 31.3 Watts with thermal dissipation up to 106.73 BTU per hour.
• Isolation Voltage: Provides 1250VAC isolation between I/O groups and logic for safety.
• Weight: 2.00 lbs (0.91 kg).

Mounting Guidelines and Environmental Tolerance

• You can mount the 1791-16AC in either vertical or horizontal orientation to fit your enclosure.
• Vertical mounting allows better airflow, supporting up to 600 mA per output at 30 degrees Celsius.
• Horizontal mounting supports up to 300 mA per output at 30 degrees Celsius due to reduced convection cooling.
• The module derates current at higher temperatures, ensuring safe operation up to 60 degrees Celsius.
• Maximum Off-state Voltage is 35 Volts with a minimum Off-state Current of 2.3 mA for reliable noise immunity.
• This Block I/O withstands typical industrial electrical noise and transient conditions.

Frequently Asked Questions (FAQ)

• Is the Allen-Bradley 1791-16AC a new or used module?
  We supply a brand new original 1791-16AC unit with full factory specifications.
• How many outputs does the 1791-16AC Block I/O provide?
  This model features sixteen 120VAC outputs split into two groups of eight for flexible load distribution.
• What is the maximum output current in a horizontal mounting position?
  In horizontal mounting, the 1791-16AC supports 150 mA at 60 degrees Celsius and 300 mA at 30 degrees Celsius per point.
• Can this module communicate directly with a PLC?
  Yes, the integrated Remote I/O adapter allows direct communication with a PLC scanner via daisy-chain connection.
• What is the isolation voltage between I/O groups?
  The module provides 1250VAC isolation between I/O groups, ensuring safe operation in mixed-voltage panels.
• Do you have the 1791-16AC in stock?
  Yes, we have stock available and typically ship orders within 5 days.

Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628

Partner NexAuto Technology Limited : https://www.nex-auto.com/