1791-16BC | Allen-Bradley Block I/O Module - Petro Auto Tech

Product Overview

The 1791-16BC is a Block I/O module from Allen-Bradley. It belongs to the 1791 Block I/O product line and is designed for remote I/O architectures. This module integrates a power supply, PLC interface, I/O connections, and signal processing circuitry into a single compact unit.

Technical Specifications Analysis

The 1791-16BC features sixteen (16) input channels and sixteen (16) output channels. Inputs operate with an on-state voltage range of 10-30V dc and an on-state current of 11mA at 30V max. Outputs deliver a voltage range of 10-30VDC. The module requires an external power supply of 19.2-30V dc and draws 300 mA. It dissipates a maximum of 17.8 Watts of power and 60.6 BTU/Hr of thermal energy. The unit weighs 2.25 lbs (1.02 kg) and supports vertical or horizontal mounting.

Application Scenarios & Usage Methods

Use the 1791-16BC to implement remote I/O architectures in manufacturing plants. Connect it in a daisy-chain topology with a compatible RIO scanner. For example, deploy it near conveyors or packaging machines to reduce wiring costs. The module works with PLC2, PLC3, PLC5, and SLC 5000 controllers. Baud rates range from 57.6K to 230.4K, supporting cable distances up to 10,000 feet at lower speeds.

Installation Guide & Packing List

Mount the module vertically or horizontally inside a suitable enclosure. Ensure at least 2 inches of clearance on all sides for airflow. The enclosure must protect against dust, dirt, grease, oil, water, and chemicals. The package includes the 1791-16BC Block I/O module and documentation. No external power fusing is required as the module is internally fused, but outputs are not fused.

Purchasing Advice

Verify that your controller supports remote I/O and that the baud rate matches your network design. The 1791-16BC offers 16 inputs and 16 outputs in a compact form factor, making it cost-effective for distributed control. Petro Auto Tech stocks this module and can provide fast delivery for your automation needs.

Repair & Maintenance Tips

Periodically inspect the module for signs of contamination or damage. Clean the enclosure exterior with a dry cloth. Keep the module in a clean, dry environment within the specified temperature and humidity ranges. Check connections for tightness and corrosion. Replace the module if internal fuses blow repeatedly.

Frequently Asked Questions (FAQs)

Q: What is the input voltage range for the 1791-16BC?

A: The input on-state voltage range is 10-30V dc.

Q: How many outputs does this module have?

A: It has sixteen (16) outputs with a voltage range of 10-30VDC.

Q: What external power supply is required?

A: The module requires an external power supply of 19.2-30V dc and 300 mA.

Q: Can I mount this module horizontally?

A: Yes, the 1791-16BC supports both vertical and horizontal mounting.

Q: What is the maximum power dissipation?

A: The maximum power dissipation is 17.8 Watts.