Allen Bradley 1756-TBCH

Brand: Allen Bradley
Model: 1756-TBCH

Inventory situation: Goods are available in stock.

Product features

The Allen Bradley 1756-TBCH is a high-quality, removable terminal block (RTB) built exclusively for Allen Bradley's ControlLogix 1756 I/O modules. This 36-pin terminal block, a critical accessory from Rockwell Automation, connects field wiring to industrial control systems via a dependable screw-clamp (cage clamp) design, making it an essential component of industrial automation setups. It is not included with ControlLogix I/O modules and must be acquired separately; nonetheless, it works flawlessly with the majority of 1756 series modules to provide versatile and durable wiring solutions.

The Allen Bradley 1756-TBCH can handle both solid and stranded copper wires, which are typical in industrial environments. It supports single-wire connections with 22-14 AWG wires (0.33-2.1 mm²) and double-wire connections with 22-16 AWG wires (0.33-1.3 mm²). Each terminal can accommodate up to two wires, but no more, to ensure safety and performance. The wires used should be rated at 90°C (194°F) or higher, with a maximum insulation thickness of 1.2 mm (3/64 inch).

The Allen Bradley 1756-TBCH is designed for severe industrial settings and has outstanding environmental performance. It runs smoothly in temperatures ranging from 0°C to 60°C (32°F to 140°F) and can be stored in temperatures as low as -40°C (-40°F) and as high as 85°C (185°F). It can also withstand vibration (5g, 10 to 500 Hz) and shock (30g, 11 ms), making it ideal for clean, dry industrial environments such as manufacturing plants, chemical facilities, and power plants. The terminal block's housing is composed of tough polycarbonate, and the terminals are nylon, ensuring long-lasting use without harm.

Specifications

Model	1756-TBCH
Product Family	ControlLogix
Product Type	Removable Terminal Block (RTB)
Number of Terminals	36-pin connection
Wiring Method	Screw clamp
Terminal Material	Nylon
Power Consumption	6.19 W
Mounting Type	Inserts into the front of a ControlLogix I/O module

Application scenarios

The Allen Bradley 1756-TBCH is a 36-pin screw-clamp terminal block that is essential in many industrial automation situations due to its dependable connection and adaptable design. It is frequently used with Allen Bradley ControlLogix 1756 I/O modules to provide stable wiring solutions for equipment control systems in manufacturing plants. The Allen Bradley 1756-TBCH is used on assembly lines for autos, electronics, and household appliances to connect sensors, actuators, and other field devices to the ControlLogix system. Its screw-clamp design maintains tight wire contact, minimizing loose connections caused by machine vibration, keeping production lines operating smoothly and reducing downtime due to wiring problems.

The Allen Bradley 1756-TBCH is also used in process control industries, including chemical plants and petroleum refineries, to ensure safe and efficient operations. These locations necessitate long-lasting wiring components that can survive constant working temperatures (0°C to 60°C) and harsh circumstances. The polycarbonate shell and nylon terminals of the Allen Bradley 1756-TBCH provide long-lasting durability, making it ideal for connecting pump, valve, and temperature controller control circuitry. It accommodates both solid and stranded copper wires, making it ideal for on-site wiring and repair in industries where equipment reliability has a direct impact on production safety.

FAQ

Q: What is the Allen Bradley 1756-TBCH?

A: The Allen Bradley 1756-TBCH is a 36-pin Removable Terminal Block (RTB) designed for the ControlLogix 1756 I/O module series. It is defined as a "cage-clamp" screw-type terminal block that allows you to terminate field wiring independently of the I/O module. The RTB plugs directly into the front of a 1756 I/O module, allowing the module to be replaced without disconnecting field wiring or rewiring terminals. This design reduces downtime by up to 60% compared to fixed terminal blocks, as you only need to swap the module and reattach the existing wiring.

Q: Which modules and chassis are compatible with the 1756-TBCH?

A: The 1756-TBCH has a 36-pin configuration and is compatible with all 1756 ControlLogix I/O modules that require a 36-pin RTB interface, including discrete, analog, and specialty modules. It can be used with any ControlLogix 1756 chassis and supports any slot position within the chassis. For example, the 1756-IB16D digital input module and the 1756-OB16IEFS solid-state output modules are fully compatible and commonly paired with this RTB.

Q: What safety and industrial certifications does the 1756-TBCH hold?

A: The Allen Bradley 1756-TBCH holds the following certifications and agency approvals: UL Listed, cULus Class I Division 2 (CL1DIV2) hazardous location approval, CE, RoHS compliance, C-Tick (RCM), KCC, CCC, GOST-R, and Marine type approvals. For hazardous location applications, the cULus CL1DIV2 rating permits installation in areas where ignitable concentrations of flammable gases, vapors, or liquids are present only under abnormal conditions. The RTB is manufactured in the USA or Mexico depending on the production batch, and the lifecycle status remains active at Rockwell Automation.

Q: Where can I find the official Rockwell Automation technical documentation?

A: The official technical data for 1756 series RTBs is available in Rockwell Automation publication 1756-TD002 - ControlLogix Chassis and Power Supplies Technical Data. This document covers all RTB variants, including the 1756-TBCH, along with chassis, power supply, and I/O module compatibility matrices.