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ABB TB840A (Part No. 3BSE037760R1) Overview
Product Positioning
The ABB TB840A is an S800 ModuleBus Cluster Modem designed for communication and redundancy within ABB 800xA / AC 800M distributed control systems.
Main Functions
Enables high-speed ModuleBus data transmission via fiber optics.
Supports redundant configurations (line redundancy, module redundancy, and hot-swapping) to ensure high system reliability.
Provides 16 digital inputs and 16 digital outputs for direct field I/O connections.
Fully compatible with 800xA, AC 800M, and other ModuleBus networks.
Technical Specifications (from official and third-party documentation)
| Item | Parameter | Description |
|---|---|---|
| Operating Temperature | –20 °C ~ 55 °C | Suitable for industrial environments |
| Power Supply | 24 V DC, 120 mA (typical) | Low-power design |
| Communication Interfaces | Fiber (ModuleBus); also supports Ethernet and RS-485 | Multiple interfaces for various network needs |
| Digital Inputs | 16 channels | Direct acquisition of field switch signals |
| Digital Outputs | 16 channels | Used to control field actuators |
| Dimensions | Approx. 120 mm × 90 mm × 70 mm (4.7 × 2.1 × 3.8 in.) | DIN rail-mounted |
| Weight | Approx. 300 g | Lightweight design |
| Certifications | CE, UL, RoHS | Compliant with international safety and environmental standards |
| Redundancy Features | Line redundancy, module redundancy, hot-swapping | Enhanced system reliability |
| Typical Industries | Metallurgy, petrochemical, pulp & paper, machinery manufacturing | Widely used in process and discrete automation |
Typical Applications
Process Control Systems: Acts as a high-speed communication bridge between master stations and field I/O in continuous production lines such as metallurgy and petrochemical industries.
Discrete Manufacturing: Used in machinery, packaging, and other applications requiring fast and reliable point control.
Robotics and Discrete Automation: Works with ABB robot controllers for real-time transmission of motion commands.
System Redundancy: In critical facilities such as power plants and refineries, its redundancy features enable fault-tolerant designs with no single points of failure.
Summary
The ABB TB840A (3BSE037760R1) is a high-reliability ModuleBus Cluster Modem purpose-built for industrial automation systems. Featuring high-speed fiber-optic communication, redundant hot-swappable design, comprehensive digital I/O interfaces, and international safety certifications, it is widely deployed in metallurgy, petrochemical, and machinery manufacturing industries as a robust communication node within control networks..jpg)
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