Allen-Bradley 1734-TOP3 POINT I/O 12-Point Screw Terminal Base

Allen-Bradley 1734-TOP3 POINT I/O 12-Terminal One-Piece Screw Base Module

Product Description

The Allen-Bradley 1734-TOP3 (Catalog Number: 1734-TOP3) is a specialized one-piece terminal base module designed for the POINT I/O system. This 12-point screw-clamp base serves as the foundational interface for mounting POINT I/O modules and terminating field wiring. Unlike multi-piece assemblies, the 1734-TOP3 offers a streamlined, one-piece construction that integrates the terminal block and backplane (PointBus) connection into a single unit, enhancing mechanical stability and simplifying installation on standard DIN rails.

This terminal base specifically supports 3-wire device connections, providing dedicated termination points for signals, commons, and power/ground returns. This makes the 1734-TOP3 the preferred choice for analog modules and digital I/O that interface with 3-wire sensors or actuators. It includes an integrated mechanical keying switch, which allows engineers to set a specific position to prevent the insertion of an incorrect I/O module, thereby protecting the system from electrical mismatch and potential hardware damage.

Technical Specifications

Detailed hardware parameters and wiring capacities for the 1734-TOP3:

Key Features

• Integrated One-Piece Design: Combines the base and the Removable Terminal Block (RTB) into a single component for high-vibration resistance.

• 12-Point Termination: Provides ample room for complex 3-wire sensor wiring (Power, Common, Signal).

• Mechanical Keyswitch: Prevents accidental insertion of mismatched I/O modules into the base.

• High Current Support: Rated for up to 8 Amps, suitable for power-heavy I/O banks.

• Flexible Mounting: Snaps securely onto 35mm DIN rails and allows for side-by-side modular expansion.

Industrial Application Scenarios

• Analog Instrumentation: Connecting 3-wire transmitters and flow meters that require independent ground/common paths.

• High-Density Sensing: Interfacing with proximity sensors and photo-eyes in packaging and sortation systems.

• Modular Machine Skids: Used by OEMs to create compact, pre-wired I/O assemblies that can be easily shipped and integrated.

• Distributed Control: Providing localized field-device termination in small-footprint cabinets.