PLC 1756-TBCH 36-pin cage-clamp removable terminal block

Parameter
Model: 1756-TBCH 36-pin cage-clamp removable terminal block 
Wire Size: 0.33-2.1 mm² (22-14 AWG)
Wire Type: Solid or stranded copper, rated 90°C, max insulation 1.2 mm
Screw Torque: 0.5 N·m (4.4 lb-in)
Screwdriver Width: 3.2 mm (1/8 in)
Extended Housing Option: 1756-TBE (for 14 AWG)
Multiple Conductors: Not permitted (single wire only)

Description

The PLC 1756-TBCH is a 36-position removable terminal block used with ControlLogix I/O modules that require cage-clamp wiring connections. It is mounted directly on the front of compatible 1756 I/O modules, creating the connection point between field wiring and the control system. The 1756-TBCH uses a cage-clamp termination method that maintains consistent contact pressure on connected wires. With the recommended tightening torque of 0.5 N·m (4.4 lb-in) using a 3.2 mm (1/8 in) screwdriver, the connection remains stable during operation and helps reduce the possibility of wire loosening caused by vibration. Used as a field wiring interface for ControlLogix I/O systems, the 1756-TBCH simplifies installation and maintenance work. The cage-clamp design allows wires to be inserted and secured without repeated screw tightening procedures, helping shorten wiring operations and reducing time required for service activities.

Frequently asked questions

Q:What housing option is needed for 14 AWG wiring?
A:The standard housing on the 1756-TBCH is sufficient for 14 AWG wiring. However, the extended housing (1756-TBE) is required if using 2.5 mm² (14 AWG) wiring with the standard housing is not deep enough.

Q:What type of terminal block is the 1756-TBCH?
A:The 1756-TBCH is a 36-position screw clamp removable terminal block with standard housing, designed for ControlLogix I/O applications.

Q:What type of wire termination method does the 1756-TBCH use?

A:The 1756-TBCH uses a cage-clamp screw connection method, allowing field wires to be secured directly at the terminal block.

Application areas

• Agency-Certified System Compliance: Mandated in application environments requiring strict UL, FM, CE, and Marine certifications, as the ControlLogix platform is agency-approved exclusively when utilizing official standard RTBs.
• Removal and Insertion Under Power (RIUP): Enables safe disconnection of plant field wiring from the active PLC chassis without turning off the system controller, allowing for rapid module replacement during live production.
• High-Density Digital I/O Wiring: Provides terminating connections for 32-point and 16-point ControlLogix digital input and output modules (such as the 1756-IB32, 1756-OB32, and 1756-IA16) handling standard 24V DC or 120V AC discrete signals.

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