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
Model
1756-TBCH
Connection Type
Screw-Clamp
Pin Count
36
Operating Temperature
0 to 60 degC (32 to 140 degF)
Screw Torque
0.5 Nm
Screwdriver Size
3.2 mm (1/8 in.)
Enclosure Type
Open
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.
