Allen-Bradley I/O Modules 1791-24B8

Allen-Bradley 1791-24B8 Block I/O Module: Comprehensive Technical Overview

Key Product Specifications

• Brand: Allen-Bradley
• Model Number: 1791-24B8
• Product Line: 1791 Block I/O
• Total I/O Points: 32 Points
• Inputs per Block: 24 points (in 3 groups of 8)
• Outputs per Block: 8 points
• Module Voltage: 24 Volts DC

Detailed Electrical Specifications

• The 1791-24B8 input on-state voltage range is 10 to 30 Volts DC.
• Input on-state current is a maximum of 11 mA at 30 Volts DC.
• The input off-state maximum voltage is 5 Volts DC at 1.5 mA.
• The output voltage range is also 10 to 30 Volts DC.
• Each output supports 0.5A to 1A continuous current per point.
• Output current rating depends on mounting orientation and temperature.
• An external power supply of 19.2-30V DC at 300 mA is required.
• The module has a maximum power dissipation of 17.1 Watts.

Environmental & Physical Characteristics

• Operating Temperature Range: 0 to 60°C (32 to 140°F)
• Relative Humidity Range: 5% to 95% non-condensing
• Storage Temperature Range: -40 to 85°C (-40 to 185°F)
• Dimensions (H x W x D): 176.5mm x 68.8mm x 98mm
• Weight: Approximately 1.75 lbs (0.79 kg)
• The module is designed for reliable performance in harsh conditions.

Frequently Asked Questions (FAQ)

• Q: What is the input voltage range for the 1791-24B8?
  A: The input on-state range is 10 to 30 Volts DC for proper operation.
• Q: How many output points does this module have?
  A: The 1791-24B8 provides eight (8) discrete DC output points.
• Q: What is the operating temperature range?
  A: It operates in a wide range from 0 to 60°C (32 to 140°F).

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