Allen-Bradley 1791-16B0 16-Point DC Block I/O Module Overview

Product Overview

The Allen-Bradley 1791-16B0 is a 16-point DC Block I/O module from the 1791 Block I/O series. Designed for industrial automation, this module converts 24 Volts DC input power into an usable DC level for connected processors. It supports various input devices such as pushbutton switches, float switches, selector switches, limit switches, and proximity switches, making it versatile for discrete control applications.

Technical Specifications Breakdown

Key parameters for the 1791-16B0 are listed below for quick reference:

Industry Applications

This module is well-suited for discrete manufacturing environments where reliable input sensing is critical. Common applications include monitoring limit switches on conveyor systems, detecting float switch levels in tanks, and interfacing with proximity sensors in packaging lines. The 16-point density allows efficient consolidation of inputs, reducing wiring and cabinet space.

Installation & Setup Guidance

Mount the module securely on a DIN rail or panel. Ensure the 24V DC power supply is within specifications. Use the removable terminal strip for wiring connections by unscrewing the two captive screws. Verify that all connected devices have compatible voltage and current ratings to prevent damage. The built-in power supply and internal protection simplify integration.

Maintenance & Reliability

Periodically inspect the module for dust or debris, especially around the status indicators and terminal strip. Check that all wiring connections remain tight. The internal protection helps guard against overcurrent conditions. For long-term reliability, operate within the specified voltage range and avoid exposure to extreme temperatures or moisture.

Compatibility & Integration

The 1791-16B0 is compatible with Allen-Bradley PLC-2, PLC-3, PLC-5/250, PLC-5, and SLC controllers. The programmable controller user interface allows easy navigation and control. Switch assemblies behind the front cover set last state, last chassis, and I/O rack number.

Selection Guide & Purchasing Advice

When selecting this module, confirm that your application requires 16 DC inputs at 24V. Verify compatibility with your controller model. For pricing, availability, and lifecycle status, contact AutoDCSTech directly. We stock genuine Allen-Bradley parts to support your automation needs.

Troubleshooting & Common Issues

If the module does not power up, check the 24V DC supply and wiring connections. Use the status indicator LEDs for diagnostic clues. If inputs are not reading correctly, verify that the input devices are functioning and that the impedance matches the module's 3.4K ohm specification. Ensure the switch assemblies are correctly configured for your rack addressing.