Allen-Bradley 1756-TBSH ControlLogix 20 Pin Spring TRM Block
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Product Overview
The 1756-TBSH ControlLogix Terminal Block is a 20-pin spring-clamp removable terminal block designed to provide high performance in an easy-to-use environment. It integrates tightly with programming software, controllers, and I/O modules, reducing development time and costs during both commissioning and normal operation. The terminal block supports both standard and safety control in the same chassis, offering a truly integrated system. It also leverages high-availability and extreme environment capabilities to meet diverse application needs.
Key Features
- Integration: Tight integration between the programming software, controller, and I/O modules reduces development time and costs.
- Flexibility: Perform both standard and safety control in the same chassis.
- High Availability: Designed to meet the demands of high-availability and extreme environments.
Specifications
- Product Series: ControlLogix (Bul. 1756 / 1757)
- Component Type: PLC & I/O
- Module Specific Functions: Terminal Block
- Description: 20-pin spring-clamp removable terminal block with standard housing
- Screw Torque: 0.8…1 N•m (7…9 lb•in)
Accessories—RTBs
1756 removable terminal blocks (RTBs) offer flexible interconnection between plant wiring and 1756 I/O modules. RTBs are sold separately and come in two types: screw-clamp and spring-clamp. The standard housing may not be deep enough for 2.5 mm² (14 AWG) wiring, so an extended housing is recommended for such cases.
Wiring Systems
As an alternative to connecting the wires manually, prewired systems can be used:
- Interface Modules (IFMs): Provide I/O terminal blocks for Digital I/O modules, using prewired cables.
- Analog Interface Modules (AIFMs): Provide I/O terminal blocks for Analog I/O modules, using prewired cables.
- I/O Module-Ready Cables: One end connects to the I/O module via an RTB, while the other end features color-coded conductors for standard terminal blocks.

