Product Overview
The Allen-Bradley 1791-TB2 is a FLEX I/O terminal base unit designed for industrial automation systems. Part of the Flex I/O 1794 series, this unit provides reliable signal termination for control modules. Its cage clamp design ensures secure wire connections, making it a dependable choice for demanding environments.
Manufactured by Rockwell Automation, the 1791-TB2 supports both panel and DIN rail mounting, offering flexibility in installation. With UL listing and CSA certification, this terminal base meets stringent safety standards.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Allen Bradley |
| Product Type |
Flex I/O Terminal Base Unit |
| Product Line |
Flex I/O 1794 |
| Part Number |
1791-TB2 |
| UPC |
662468112321 |
| Weight |
0.50 lbs (0.23 kg) |
| Terminal Screw Torque |
0.56-0.79 Nm |
| Supply Voltage Range |
max. 125V DC/AC, 50/60Hz, 10A |
| Isolation Voltage |
125V Continuous |
| Voltage Rating |
24V DC/AC, 120V DC/AC |
| Wire Size |
0.21-1.3 mm² |
Key Features & Benefits
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Cage clamp termination: Provides secure and reliable wire connections, reducing maintenance.
-
Flexible mounting: Can be mounted on a panel or DIN rail, adapting to various enclosure designs.
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High current capacity: Handles up to 10 Amps, suitable for demanding I/O applications.
-
Wide voltage range: Supports 24V and 120V AC/DC systems, increasing versatility.
-
UL/CSA certified: Meets North American safety standards for industrial equipment.
Industry Applications
The 1791-TB2 is ideal for manufacturing lines, process control systems, and material handling equipment. Its robust design ensures reliable performance in factory automation, where consistent signal integrity is critical. For example, in a packaging line, the 1791-TB2 can terminate discrete I/O signals from sensors and actuators, enabling precise control of the machinery.
In a wastewater treatment plant, the unit’s ability to handle 120V AC signals makes it suitable for interfacing with pumps and valves. The cage clamp terminals simplify wiring, reducing installation time and potential errors.
Installation Guide
Mount the 1791-TB2 on a standard DIN rail or panel using the provided mounting holes. Ensure the terminal screws are torqued to 0.56-0.79 Nm to guarantee proper connections. Use wire sizes within the 0.21-1.3 mm² range for optimal performance. Align the unit with the Flexbus connectors before locking it into place.
Maintenance & Reliability
Periodically inspect the terminal connections for tightness, as vibration can loosen screws over time. Keep the unit free from dust and moisture to maintain isolation integrity. The operating temperature range of 0 to 55°C ensures reliable operation in most industrial environments. With proper care, this terminal base provides long service life, reducing downtime and replacement costs.
Selection Guide
When ordering the 1791-TB2, verify compatibility with your existing FLEX I/O system. Confirm the required voltage rating (24V or 120V) and ensure the wire size matches your application. As a trusted supplier, PLC Source PRO offers genuine Allen-Bradley components with fast shipping and competitive pricing. Ensure you purchase from a reliable source to avoid counterfeit parts.