Allen-Bradley 1756-TBSH ControlLogix RTB Terminal Block

Overview

The 1756-TBSH by Allen-Bradley is a ControlLogix removable terminal block engineered for compact I/O wiring distribution within modular PLC systems. It provides a standardized field termination interface for ControlLogix I/O modules, enabling efficient wiring replacement and simplified maintenance operations.

This model uses a spring-clamp termination mechanism designed for single-conductor wiring per terminal, ensuring stable electrical contact without periodic retightening. The compact 20-point configuration is suitable for medium-density signal interfacing in control cabinets where space optimization and wiring clarity are required.

The standard-depth structure supports conventional control panel wiring layouts and is intended for use with light-gauge conductors in structured automation environments.

Key Features

• 20-position removable terminal interface

• Spring-clamp termination for tool-free wiring installation

• Single conductor per terminal point design

• Compatible with ControlLogix I/O modules

• Standard-depth mechanical housing

• Designed for light-duty control wiring applications

• Stable vibration-resistant conductor retention

• Supports efficient module replacement without rewiring field circuits

Technical Specifications

Installation and Wiring Notes

The 1756-TBSH is intended for use with compatible ControlLogix I/O modules requiring removable field wiring interfaces. Its spring-clamp mechanism supports fast installation and secure retention of standard copper conductors.

This terminal block is optimized for standard wiring practices and is not recommended for heavy-gauge or high-mechanical-stress cabling applications. Proper conductor sizing and installation practices should be followed to ensure long-term reliability.

Application Areas

Typical deployment scenarios include:

• PLC I/O wiring distribution panels

• Compact automation control systems

• Packaging machinery wiring interfaces

• Light-duty industrial control cabinets

• Machine-level signal termination

• Modular I/O expansion systems

• OEM equipment electrical assemblies

FAQ

What type of wiring connection does the 1756-TBSH use?

It uses a spring-clamp mechanism designed for fast, tool-less termination of single conductors.

How many terminals are available on this module?

The module provides 20 individual wiring positions.

Can heavy-gauge wire be used with this RTB?

No. It is designed for standard light-gauge wiring and is not suitable for heavy-gauge conductors.

Is rewiring required when replacing I/O modules?

No. The removable design allows module replacement while keeping field wiring intact.