The Allen-Bradley 1756-TBCH is a 36-pin Removable Terminal Block (RTB) engineered for use with ControlLogix 1756 series I/O modules. This component serves as the primary interface between field-side wiring and the I/O module, facilitating efficient installation and maintenance within industrial control systems.

Features

• 36-pin screw-clamp connection design.
• Plugs directly into the front of compatible ControlLogix I/O modules.
• Removable architecture allows for module replacement without disconnecting individual field wires.
• Supports 90 degC rated wire.
• Compatible with 3.2 mm (1/8 in.) flathead screwdrivers.

Applications

This terminal block is essential for ControlLogix deployments in diverse industrial sectors, including:

• Water and wastewater treatment facilities.
• Oil, gas, and petrochemical processing plants.
• Automotive manufacturing and heavy industrial assembly.
• Food and beverage packaging lines.

Technical Specifications

Installation Guidelines

• Ensure the ControlLogix chassis and power supply are properly installed and grounded before mounting the RTB.
• For optimal cable management, begin wiring at the bottom terminals and progress upward.
• Utilize the integrated strain relief area at the base of the RTB to secure field cables with tie wraps.
• Always power down the system before inserting or removing the terminal block from an I/O module.
• Ensure wire insulation is rated for 90 degC or higher with a maximum thickness of 1.2 mm.

FAQ

What is the primary function of the 1756-TBCH?

The 1756-TBCH is a removable terminal block that provides a modular connection point for field wiring to ControlLogix I/O modules, enabling quick module replacement without disturbing the wiring harness.

What type of screwdriver is required for installation?

A 3.2 mm (1/8-inch) flathead screwdriver is recommended for securing wires into the screw-clamp terminals.

Can this module be used in high-temperature environments?

The device is rated for an operating temperature range of 0 to 60 degC (32 to 140 degF). Ensure that all connected field wiring is rated for at least 90 degC.