ABB TB850 | 3BSC950193R1 | CEX-Bus Baseplate / Terminator Module

Product Overview

The ABB TB850 (3BSC950193R1) is a precision-engineered CEX-Bus baseplate designed for the AC 800M (PM8xx series) controllers. Serving as both a mounting platform and a signal terminator, it enables seamless communication between the processor unit and compatible expansion modules. Its robust design ensures stable connections, low-latency data transfer, and long-term operational reliability in industrial automation and building control environments.

Key Features

High-Speed Data Extension
The TB850 supports high-speed communication between the AC 800M CPU and connected interface modules, ensuring rapid, low-latency data exchange essential for real-time control systems.

Modular Design
Engineered for flexibility, the baseplate allows easy addition or removal of CEX-Bus modules without altering the entire controller setup. Plug-and-play compatibility reduces installation time and minimizes system downtime.

Secure Mechanical Connection
Gold-plated connector pins ensure minimal contact resistance, and the integrated locking mechanism maintains stable electrical connections even under vibration or industrial conditions.

Integrated Bus Termination
The TB850 includes built-in termination to prevent signal reflection, preserving the integrity of high-speed CEX-Bus data transmission.

Hot-Swap Support
When paired with compatible AC 800M processors, communication modules can be replaced without powering down the system, supporting continuous operation and high-availability configurations.

Technical Specifications

Applications

Industrial Automation: Extends AC 800M controller connectivity to interface modules for process control, factory automation, and device monitoring.

Building Automation: Supports integration with building management systems for lighting, HVAC, and security control modules.

Other Scenarios: Suitable for niche automation setups requiring CEX-Bus communication, such as transportation systems and remote monitoring networks.

Installation Guidelines

• Ensure CEX-Bus cable lengths do not exceed manufacturer limits.

• Firmly seat the TB850 on the processor-side connector to prevent "Module Missing" errors.

• Supports both horizontal and vertical DIN rail mounting for compact control cabinet design.

Frequently Asked Questions (FAQ)

Q: Can TB850 modules be installed while the system is powered?
A: Yes, when used with compatible AC 800M processors, hot-swap installation is supported.

Q: Does it require configuration?
A: No configuration is needed; the module works immediately upon physical installation.

Q: Are there alternative modules for comparison?
A: The CI850 and CI853 modules serve specific interface functions (MMS/IEC 61850, RS-232) and can be paired with TB850 baseplates.