Allen-Bradley 1791-32A0 Block I/O | 32 Input RIO Module

Allen-Bradley 1791-32A0 Discrete Input Module: Technical Overview

Core Product Specifications

• Brand: Allen-Bradley
• Model Number: 1791-32A0
• Product Line: 1791 Block I/O
• Module Type: Discrete AC Input Module
• Total Input Channels: 32 Channels
• Input Grouping: 4 Groups of 8 Channels Each
• Nominal Input Voltage: 120V AC

Electrical Ratings & Performance

• The 1791-32A0 on-state input range is 79-132V AC, 47-63 Hz.
• On-state current is 5 mA min at 79V, 12.3 mA max at 132V AC.
• Off-state leakage is a maximum of 35V AC at 2.3 mA.
• Each input channel has an impedance of 15KΩ at 60 Hz.
• Input signal delay is 1 ms (OFF to ON) and max 26 ms (ON to OFF).
• External power requirement is 85-132V AC, 47-63 Hz at 150 mA.
• Maximum module power dissipation is 13.62 Watts.

Isolation & Environmental Ratings

• Isolation (I/O Group to Group/Logic): 1250V AC
• Isolation (Power Supply to RIO): 500V AC
• Operating Temperature: 0 to 60°C (32 to 140°F)
• Storage Temperature: -40 to 85°C (-40 to 185°F)
• Relative Humidity: 5% to 95% (non-condensing)
• Thermal dissipation is a maximum of 46.44 BTU per hour.

Frequently Asked Questions (FAQ)

• Q: What is the input voltage range for this module?
  A: The 1791-32A0 operates from 79 to 132 Volts AC, 47-63 Hz.
• Q: Does this module have any outputs?
  A: No, the 1791-32A0 is a discrete input-only module with 32 channels.
• Q: What communication protocol does it use?
  A: It uses the Remote I/O (RIO) protocol for distributed control systems.
• Q: How are the 32 inputs organized?
  A: Inputs are divided into four isolated groups, each containing eight channels.

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