TB840 ABB | ModuleBus Communication Modem for Industrial Automation
Manufacturer: ABB
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Part Number: TB840
Condition：New with Original Package
Product Type: ModuleBus Communication Modem for Industrial Automation
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The ABB TB840 is a high-performance ModuleBus Cluster Modem designed for the S800 I/O system in ABB’s System 800xA automation platform.
It provides a fiber optic interface for the Optical ModuleBus, enabling communication between I/O modules and controllers over long distances with high reliability.
The modem supports 1+1 redundant operation, ensuring fault tolerance and continuous operation in critical industrial environments.
Its electrical and optical interfaces are logically part of the same bus, allowing flexible installation and robust data transmission across distributed control systems.
The TB840A is a pin-compatible replacement with hardware improvements, maintaining the same core functionality for seamless upgrades.
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | TB840 |
| Part Number | 3BSE021456R1 |
| Product Type | ModuleBus Cluster Modem |
| System Compatibility | ABB S800 I/O, System 800xA |
| Function | Fiber optic modem for Optical ModuleBus |
| Interfaces | Electrical ModuleBus, Optical ModuleBus |
| Communication Speed | 10,000 kbit/s |
| Number of Channels | 1 |
| Mounting Type | DIN rail |
| Use Case | Redundant configurations, long-distance communication |
| Application Areas | Industrial automation, process control, distributed I/O systems |
| Product Net Weight | 0.272 kg |
| Gross Volume | 2 dm³ |
| Country of Origin | Germany (DE), Sweden (SE) |
FAQ
Q1: What is the ABB TB840 used for?
A1: It provides a fiber optic interface for the Optical ModuleBus, enabling communication between I/O modules and controllers.
Q2: Can the TB840 operate redundantly?
A2: Yes, it supports 1+1 redundant operation, allowing continuous system function if one module fails.
Q3: What are the installation requirements?
A3: The module mounts on a DIN rail and integrates with both electrical and optical ModuleBus interfaces.
Q4: What communication speed does it support?
A4: It supports a data rate of 10,000 kbit/s, ensuring fast, reliable transmission.
Q5: Is the TB840 compatible with newer modules?
A5: Yes, the TB840A is a pin-compatible upgrade with improved hardware but identical functionality.