1791-TB2 | Allen-Bradley Flex I/O Terminal Base Unit - Petro Auto Tech

Product Overview

The **1791-TB2** is a Flex I/O Terminal Base Unit designed and manufactured by Allen-Bradley/Rockwell Automation. It belongs to the Flex I/O 1794 series and serves as a reliable connection interface for industrial automation systems. This unit features a cage clamp termination type and is UL listed and CSA certified, ensuring compliance with safety standards. It can be mounted on either a panel or DIN Rail, offering flexibility for various installation environments.

Technical Specifications Analysis

The 1791-TB2 terminal base unit operates with a supply voltage range of max. 125V DC/AC at 50/60Hz and 10A. It provides isolation voltage of 125V Continuous and supports voltage ratings of 24V DC/AC and 120V DC/AC. The terminal screw torque is specified at 0.56-0.79 Nm, and the wire size ranges from 0.21 to 1.3 mm². The unit weighs 0.50 lbs (0.23 kg) and has a UPC of 662468112321. These parameters ensure compatibility with standard industrial wiring and power requirements.

Application Scenarios & Usage Methods

This terminal base unit is ideal for distributed I/O applications in manufacturing plants, process control systems, and material handling lines. For example, connect it to a 24V DC sensor network to monitor conveyor belt status. Use the cage clamp terminals to secure 0.21-1.3 mm² wires without special tools. The unit supports up to 10A current, making it suitable for driving small actuators or indicator lights. Its 125V continuous isolation voltage provides reliable signal integrity in noisy environments.

Installation Guide & Packing List

Mount the 1791-TB2 on a panel or DIN rail using the provided holes or rail clip. Ensure the operating temperature stays between 0 to 55 degrees Celsius. Connect wires to the terminal strips with a screw torque of 0.56-0.79 Nm. The unit includes a female Flexbus connector, a male Flexbus connector with cover plug, a key switch, input/output terminal strips, a locking tab, and a module locking latch. No additional accessories are required for basic installation.

Purchasing Advice

When selecting a terminal base unit, verify that your application voltage matches the 24V DC/AC or 120V DC/AC ratings. The 1791-TB2 is a robust choice for systems requiring up to 10A per channel. For reliable supply and fast delivery, choose Petro Auto Tech as your trusted industrial automation parts supplier. We stock genuine Allen-Bradley components to ensure system compatibility and longevity.

Repair & Maintenance Tips

Inspect the terminal base unit periodically for loose connections or corrosion. Clean the cage clamp contacts with a dry cloth to maintain conductivity. Store the unit in a clean, dry environment within the storage temperature range of -40 to 85 degrees Celsius. Avoid exposing the unit to excessive vibration or shock beyond the tested 5 g at 10 to 500 Hertz. Replace any damaged components immediately to prevent system faults.

Frequently Asked Questions (FAQs)

Q: What is the maximum supply voltage for the 1791-TB2?

A: The maximum supply voltage is 125V DC/AC at 50/60Hz and 10A.

Q: What wire sizes does the 1791-TB2 accept?

A: It accepts wire sizes from 0.21 to 1.3 mm².

Q: Can the 1791-TB2 be mounted on a DIN rail?

A: Yes, it can be mounted on either a panel or DIN Rail.

Q: What is the isolation voltage of this terminal base unit?

A: The isolation voltage is 125V Continuous.

Q: What certifications does the 1791-TB2 hold?

A: It is UL listed and CSA certified.