1791-0B16 Allen-Bradley 16 Ch DC Block I/O Module | Rockwell

Overview

The Allen-Bradley 1791-0B16 serves as a robust 16-channel discrete DC output solution for Universal Remote I/O systems. This compact Series B block integrates a programmable controller interface, power supply, and signal-generating circuits into one unit. Engineering teams choose the 1791-0B16 to minimize enclosure costs in material handling and packaging applications. Author: Oiltech Controls.

Core Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation
• Model Number: 1791-0B16
• Product Line: 1791 Block I/O Series
• Output Channels: 16 Discrete Outputs
• Nominal Voltage: 24V DC
• External Power Range: 19.2 to 30V DC
• Output Voltage Range: 10 to 30V DC
• Max On-State Voltage Drop: 1V at rated current
• Off-State Leakage Current: 0.5mA maximum
• Output Signal Delay: 0.5ms On / 1.0ms Off
• Power Dissipation: 12.5 Watts maximum
• Thermal Dissipation: 43 BTU per hour

Installation and Mechanical Limits

• Vertical Mounting Capacity: 500mA per output at 60 °C (Recommended)
• Horizontal Mounting Capacity: 250mA per output at 60 °C
• Module Weight: 1.00 lbs (0.45 kg)
• Physical Dimensions: 6.95 x 2.7 x 3.85 inches
• Wiring Specification: 14 AWG (2 mm²) solid standard wire
• Internal Protection: Built-in internal fusing eliminates external output power fuses
• Status Monitoring: 1 COMM, 1 STATUS, and 16 I/O LED indicators
• Removable Terminals: Terminal strips allow fast module replacement without rewiring

System Compatibility

• Supported Controllers: PLC-2, PLC-3, PLC-5 series, and SLC 5/02 processors
• Communication Protocol: Universal Remote I/O for distributed hardware architectures
• Switch Configuration: Two internal switches set rack number and communication rates
• Termination Requirement: Install a resistor if the block ends a physical sequence

Packaging and Logistics

• Packing List: One 1791-0B16 Block I/O Module and connector kit
• Shipping Methods: Rapid global delivery via Fedex, UPS, and DHL
• Availability: Contact our team for real-time stock and lead time data

Experience-Based FAQ and Selection Guide

• Question: Why does the current rating drop when I mount the module horizontally?
• Answer: Horizontal mounting restricts natural airflow which forces a 50% reduction in current.
• Question: Do I need to buy separate fuses for the output power lines?
• Answer: No, the 1791-0B16 contains internal fusing that protects the circuitry.
• Question: How do I determine if my SLC controller supports this specific block?
• Answer: You must use an SLC 5/02 or higher processor with a remote I/O scanner.
• Question: What should I check if the STATUS LED remains off during startup?
• Answer: Verify the 24V DC external power and check internal switches for rack conflicts.

For technical support or pricing, contact Oiltech Controls at info@oiltechcontrols.com or via WhatsApp at +86 158 8020 0923.

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