Allen-Bradley 1791-8BC Remote IO Block IO Module

Description:

The Allen-Bradley 1791-8BC Block I/O Module is used in distributed industrial automation systems to provide combined digital input and output functionality over a Remote I/O (RIO) network. Commonly installed in conveyor systems, packaging machinery, material handling equipment, assembly lines, and manufacturing processes requiring remote field-level I/O control. Maintenance teams and system integrators use this module for system expansion, replacement, retrofit projects, and modernization of PLC-based control systems utilizing Block I/O architecture.

Applications:

The Allen-Bradley 1791-8BC Block I/O Module is commonly used in remote I/O installations, conveyor controls, packaging equipment, assembly automation systems, process control applications, and material handling machinery where distributed 24 VDC input and output monitoring is required without the need for a traditional PLC chassis.

Technical Specifications:

• Manufacturer: Allen-Bradley
• Part Number: 1791-8BC
• Product Type: Block I/O Module
• Series: 1791 Block I/O
• I/O Configuration: 8 Inputs / 8 Outputs
• Total I/O Points: 16
• Input Voltage: 24 VDC Nominal
• Input Voltage Range: 10-30 VDC
• Output Voltage Range: 10-30 VDC
• Number of Inputs: 8 Digital Inputs
• Number of Outputs: 8 Digital Outputs
• Output Current Rating: 500 mA @ 60°C, 1 A @ 30°C (Vertical Mounting)
• External Power Requirement: 19.2-30 VDC
• Communication Protocol: Remote I/O (RIO)
• Mounting Style: DIN Rail Mount
• Isolation: 500 VAC Isolation
• Operating Function: Distributed Remote Input/Output Control
• Compatible Controllers: PLC-2, PLC-3, PLC-5, and SLC Systems with RIO Support

Common Replacements:

• Allen-Bradley 1791-16BC
• Allen-Bradley 1791-24B8
• Allen-Bradley 1791-8BR