ABB TB840A Communication Interface Module

Description

ABB TB840A Communication Interface Module

The ABB TB840A is a high-performance ModuleBus Optical Port used within the ABB S800 I/O system. It serves as a critical communication interface, allowing the expansion of I/O clusters via optical fiber links, which provides electrical isolation and extends the distance between I/O stations.

Product Description

The TB840A acts as an interconnection point for the S800 I/O system. Its primary role is to convert the electrical ModuleBus signals from a CI801 or CI840 Cluster Configurator into optical signals. This allows for the creation of extended I/O clusters or redundant ModuleBus configurations, ensuring that data transmission remains stable even in environments with high electromagnetic interference.

Technical Parameters

Product Advantages

• Galvanic Isolation: Since it uses fiber optics, it provides complete electrical isolation between I/O clusters, protecting the system from ground loops and power surges.

• High Reliability: Supports redundant configurations. If one optical link fails, the system can seamlessly switch to the backup path without interrupting the process.

• Noise Immunity: Optical transmission is immune to electromagnetic interference (EMI) and radio frequency interference (RFI), making it ideal for harsh industrial environments.

• Scalability: Allows the S800 I/O system to be distributed over longer distances than standard electrical cabling allows.

Key Considerations & Precautions

• Fiber Handling: Optical fibers have a minimum bend radius. Ensure cables are not kinked or tightly coiled, as this can cause signal loss.

• Power Supply: The TB840A is powered via the ModuleBus; ensure the Cluster Configurator (CI unit) has sufficient power capacity for all connected modules.

• Firmware Compatibility: Ensure the firmware version of your CI840 or CI801 is compatible with the TB840A hardware revision.

• Cleanliness: Keep optical connectors capped when not in use. Dust on the optical ports can significantly degrade communication quality.

Product Applications

• Distributed Control Systems (DCS): Used in ABB Ability™ 800xA systems to connect remote I/O stations.

• Hazardous Environments: Ideal for plants where electrical isolation is required for safety.

• Power Plants & Refineries: Where long-distance communication between the control room and field equipment is necessary.

• High-Interference Zones: Applications near large motors, frequency converters, or high-voltage switchgear.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Please make an inquiry for more models：