ABB 3BSE043660R1 TB842 Terminal Unit | 16 CH, for S800 I/O Modules

ABB 3BSE043660R1 TB842 terminal unit. 16 channels, 3-wire, M20 cable gland. For connecting field cables to S800 I/O modules.

Product: ABB 3BSE043660R1 TB842 Terminal Unit

The ABB 3BSE043660R1 (TB842) is a 16-channel terminal unit designed to provide a rugged, high-density interface for connecting field wiring to specific S800 I/O modules. It serves as the critical junction point between the process field instruments and the electronic I/O module.

Key Features

• High-Density Interface:​ Accommodates 16 field signal pairs (32 wires) in a compact unit.

• Robust Protection:​ Features IP66/IP67 rated cable glands for reliable ingress protection.

• Pre-Configured Connection:​ Simplifies wiring with pre-assembled ribbon cables to the I/O module.

• Clear Labeling:​ Provides clear terminal markings for easy installation and maintenance.

Technical Specifications

Function & Application

The TB842 acts as a remote marshalling terminal. Field cables from sensors (e.g., 4-20mA transmitters) or actuators are landed on its robust, protected terminals. A dedicated ribbon cable then carries these signals to the corresponding S800 electronic module mounted elsewhere in the cabinet, simplifying cabinet layout and improving maintenance access.

Typical Applications

• High-density I/O applications in process automation (e.g., tank farms, compressor stations).

• Situations requiring separation of field wiring from electronic modules for maintenance or noise reduction.

• Projects using S800 I/O with modules that require this specific terminal unit interface.

Critical Compatibility & Configuration Note

• Not a Universal Unit:​ The TB842 is specifically designed for certain 16-channel S800 I/O modules. It will not work with all S800 modules. Always verify compatibility with the exact I/O module part number (e.g., AI845, DI845).

• Pre-Assembled Cable:​ The ribbon cable is fixed-length and pre-connected; the TB842 and its paired module are sold and installed as a matched set.

• System Component:​ This is an accessory that must​ be used with a compatible S800 I/O module and mounted in a compatible S800 mounting unit (TU84x series).

Note: Specifications are for product identification and comparison. This is a system-specific accessory. For exact compatibility, wiring diagrams, and installation instructions, consult the official ABB S800 I/O Terminal Units Hardware Manual (3BSE022900R0101) or the data sheet for the specific I/O module.