Allen-Bradley 1791-16BC Block I/O 16-Input / 16-Output DC Module

Product Overview

The 1791-16BC functions as a high-density, standalone remote I/O interface for Allen-Bradley PLC and SLC control systems. By combining 16 discrete DC inputs and 16 discrete DC outputs into a single "Block" housing, this module eliminates the need for separate chassis-based I/O cards. It excels in distributed control architectures where localized signal processing reduces wiring overhead and assembly time. We provide this unit as 100% Brand New and factory-original, ensuring maximum operational life for your legacy infrastructure.

Technical Specifications

This module integrates both sensing and switching capabilities within a rugged, compact footprint.

Engineering Advantages

• Reduced Installation Footprint: The 1791-16BC integrates 32 I/O points without requiring a chassis or power supply module. This "Block" design saves significant cabinet space and allows engineers to mount I/O directly on the machine frame.

• Simplified Field Wiring: The module utilizes a logical terminal layout that separates inputs and outputs. This organization accelerates the commissioning process and prevents wiring errors during high-pressure maintenance windows.

• Ruggedized Remote Processing: Unlike standard rack-mounted cards, the 1791 series features a self-contained enclosure. This construction protects internal circuitry from industrial dust and localized vibration, making it ideal for decentralized mounting near field sensors.

• Legacy Continuity: By utilizing 100% Brand New stock, facilities can maintain older Remote I/O (RIO) networks without the compatibility risks or contamination issues often found in used or refurbished surplus hardware.

FAQs

• Does the 1791-16BC require a separate rack or chassis?

  No. The 1791-16BC is a standalone Block I/O module. It mounts directly to a panel or DIN rail and connects to the processor via the Remote I/O blue hose link.

• How does the module handle fault diagnostics?

  The front panel includes comprehensive LED indicators. These lights provide real-time status of the RIO communication link, internal module health, and individual I/O point activity for rapid troubleshooting.

• What is the benefit of a "Brand New" unit for a discontinued series?

  Many 1791-16BC units on the market are "pulls" from active environments. Our 100% Brand New units feature pristine terminal blocks and zero-cycle internal components, preventing the intermittent communication failures common in aged equipment.

• Can this module interface with newer ControlLogix systems?

  Yes, provided you utilize a 1756-DHRIO or 1756-RIO module in the ControlLogix rack. This allows the 1791-16BC to function as a remote drop within a modern control architecture.