Allen-Bradley 1794-TB3 FLEX I/O Terminal Base | 3-Channel, IP20, Screw Terminal, DIN Rail Specs

Allen-Bradley 1794-TB3 FLEX I/O Terminal Base | 3-Channel, IP20, Screw Terminal, DIN Rail Specs

Allen-Bradley 1794-TB3 FLEX I/O terminal base unit specifications. 3-channel terminal base, screw terminals, DIN rail mount, IP20. For industrial I/O wiring.

Product Overview

The Allen-Bradley 1794-TB3​ is a 3-channel terminal base unit​ from the FLEX I/O series, designed for industrial I/O wiring applications. This terminal base provides connection points for 3 channels​ of I/O signals, screw terminal connections, and DIN rail mounting. The "1794" designation indicates the FLEX I/O series, "TB3" specifies the 3-channel terminal base configuration. This unit serves as the interface between FLEX I/O modules and field wiring, providing secure, reliable connections for I/O signals in distributed control systems.

Technical Specifications

Note: Specifications are based on Allen-Bradley 1794 series technical documentation. The "1794-TB3" model specifically indicates 3-channel terminal base configuration. Actual specifications may vary slightly depending on production batch.

Model Number Decoding (1794-TB3)

• 1794:​ Series designation (FLEX I/O series)

• TB3:​ Product type (TB = Terminal Base, 3 = 3 channels)

Note:​ The "TB" prefix indicates Terminal Base functionality. The "3" suffix specifies 3 channels of I/O connection points. This is the basic terminal base unit for 3-channel FLEX I/O modules. Different suffix numbers indicate different channel counts (TB2, TB8, TB16, etc.).

Key Features

• 3-Channel Design:​ Connection points for 3 I/O signals

• Screw Terminals:​ Secure wire connections with screw terminals

• DIN Rail Mounting:​ Easy installation on standard 35mm DIN rail

• Module Locking:​ Positive mechanical latch for secure module attachment

• Clear Identification:​ Numbered terminals for easy wiring identification

• Durable Construction:​ Polyamide housing for industrial environments

• Wide Temperature Range:​ Suitable for industrial applications

• Easy Installation:​ Tool-less module attachment and removal

• Ground Connection:​ Dedicated ground terminal for proper grounding

• Compact Design:​ Space-efficient footprint for high-density installations

• International Approvals:​ Certified for global use

Terminal Configuration

Typical Applications

• Discrete I/O Wiring:​ Connection point for digital input/output signals

• Analog I/O Wiring:​ Interface for analog signal wiring

• Sensor Connection:​ Termination point for sensor signals

• Actuator Control:​ Wiring interface for control outputs

• Machine Control:​ I/O wiring for machine automation

• Process Control:​ Field wiring for process instrumentation

• Material Handling:​ I/O connections for conveyor and sorting systems

• Packaging Machinery:​ Wiring interface for packaging equipment

• Building Automation:​ I/O termination for building control systems

• Test Equipment:​ Signal connection for test and measurement systems

Important Technical Notes

1. Module Compatibility:​ Designed for use with 1794 series I/O modules. Ensure module channel count matches terminal base channel count.

2. Wiring Guidelines:​ Use proper wire size (12-24 AWG). Strip wire to appropriate length (7-8 mm). Follow torque specifications for terminal screws.

3. Grounding:​ Always connect ground terminal to proper earth ground for safety and noise immunity.

4. Mounting:​ Install on 35mm DIN rail with proper orientation. Ensure adequate clearance for wiring and module installation.

5. Wire Management:​ Use proper wire management techniques. Avoid sharp bends and excessive strain on wires.

6. Environmental Conditions:​ Install in appropriate enclosure for additional protection. IP20 provides limited protection against dust and moisture.

7. Module Installation:​ Align module with terminal base and press until latch clicks. To remove, release latch and carefully separate module.

8. Terminal Identification:​ Terminals are numbered for easy identification. Follow wiring diagrams for proper channel assignments.

9. Maintenance:​ Periodically check terminal tightness. Loose connections can cause signal problems or overheating.

Note: For complete installation guidelines, wiring diagrams, application notes, and detailed technical data, consult the official Allen-Bradley 1794 Series Technical Manual. Always verify the exact model number configuration with the manufacturer, as notation variations may occur.