ABB TP853 3BSE018126R1 Module Termination Unit Baseplate

The ABB 3BSE018126R1, also cataloged as the TP853 Module Termination Unit, operates as a dedicated hardware component for physical mounting and backplane interface connection within System 800xA and Compact Products 800 platforms.

Hardware Specifications

Backplane Bus Communication Velocity & Interface Options

The ABB TP853 serves as the mechanical base and electrical routing path for System 800xA communication interface modules. Internal trace routing supports high-velocity backplane bus communication velocity across module interconnects, preventing signal attenuation during high-density I/O operations. The unit provides dedicated DIN-rail mechanical locking tabs and integrated physical keying slots to prevent the insertion of incompatible communication cards into live bus segments.

Frequently Asked Questions

Q: Does the TP853 baseplate support hot-swapping of connected CI modules?

A: Yes, connected communication interface modules (such as the CI853 or CI857) can be removed or inserted into the TP853 baseplate without removing power from the remaining System 800xA backplane segment, provided field wiring protocols permit live insertion.

Q: What is the maximum current capacity supported by the TP853 power distribution buses?

A: The baseplate internal bus bar network is rated to carry the full maximum operating current required by the hosted CI series communication modules without causing excessive localized thermal rise or voltage droop across the backplane terminals.

Field Installation Guidelines

Mount the TP853 directly to a standard 35 mm DIN rail in accordance with EN 50022. Ensure grounding spring clips make direct, unpainted metal-to-metal contact with the DIN rail to establish an effective protective earth (PE) bond.

When positioning adjacent baseplates, sliding side connectors must be fully engaged to preserve backplane communication line continuity. Secure all field wiring to the integral terminal blocks using correct wire gauges, ensuring signal shield drain wires are terminated to designated grounding lugs to minimize electromagnetic noise coupling. Maintain a minimum vertical clearance of 50 mm above and below the baseplate assembly for adequate thermal convection airflow inside the cabinet.