The Allen-Bradley 1791-16B0, also cataloged as the 1791-16B0 Block I/O Input Module, operates as a dedicated hardware component for 24 VDC discrete signal acquisition within Allen-Bradley Block I/O control networks. The module provides 16 digital input points for direct field device signal collection.

Model Identification & Configuration

The 1791-16B0 belongs to the Allen-Bradley Block I/O family and provides a fixed 16-point digital input configuration. Related catalog references include 179116B0, 1791-16BO/A, and 1791-16BO/B.

The module is designed for connection of discrete field devices requiring 24 VDC input monitoring. It functions as a remote I/O interface between field wiring and the connected PLC control system.

Hardware Specifications

Industrial Control Network Compatibility

Allen-Bradley Block I/O modules are designed for distributed PLC architectures where field signals are collected outside the main control cabinet. The 1791-16B0 supports I/O density scaling by providing multiple discrete input channels within a compact remote module format.

The module operates as part of Allen-Bradley industrial control systems where digital field states are transferred to the controller through the selected Block I/O communication architecture. Installation should follow the applicable PLC network design and controller configuration requirements.

Ordering Information

The standard shipment configuration includes:

• 1 x Allen-Bradley 1791-16B0 Block I/O 24 VDC 16 Point Input Module
• 1 x Product identification label with catalog information
• 1 x Factory-installed hardware assembly

Additional accessories such as field connectors, mounting hardware, and network interface components depend on the original system installation requirements.

Field Installation Guidelines

Electrical Wiring

• Verify field input voltage compatibility before connecting external devices.
• Separate DC input wiring from high-voltage power conductors to reduce electrical interference.
• Use appropriate terminal tightening procedures according to the installation documentation.

Grounding and Noise Control

• Connect shielding and grounding according to the cabinet grounding design.
• Maintain proper cable routing separation between signal wiring and motor or drive power cables.
• Confirm field device polarity before applying 24 VDC input power.

Configuration Check

• Verify the PLC controller configuration matches the installed Block I/O module type.
• Confirm input addressing and channel assignment before commissioning.
• Inspect all field connections before energizing the control system.

Frequently Asked Questions

• What is the main function of the Allen-Bradley 1791-16B0?

  The 1791-16B0 is a 24 VDC digital input Block I/O module designed to collect discrete field signals through 16 input channels.

• How many input points are available on this module?

  The module provides 16 digital input points for monitoring external 24 VDC field devices connected to the control system.

• Is the 1791-16B0 compatible with analog signals?

  No. The module is designed for discrete digital input signals and does not provide analog measurement capability.

• Does the 1791-16B0 support hot swapping?

  Hot swapping capability is not specified in the available documentation. System power should be removed before module replacement.

• What voltage level does the input module use?

  The module is specified for 24 VDC input operation for industrial discrete signal monitoring applications.

• Can the module be installed in a standard PLC rack?

  The 1791-16B0 is a Block I/O module and is not installed as a standard rack-mounted chassis module.

• What installation factors affect signal performance?

  Proper grounding, cable separation, and correct field wiring practices help reduce electrical noise and signal interference.

• Is firmware compatibility information available for this module?

  Specific firmware revision details are not provided in the available documentation. Controller compatibility should be verified before installation.