ABB TB820 3BSE008555R1 S800 I/O ModuleBus Cluster Modem

Description

The ABB TB820 is a ModuleBus Cluster Modem for the S800 I/O system, converting electrical signals to fiber optics for long-distance communication between I/O clusters. It provides full galvanic isolation, strong EMI immunity, and high-speed, deterministic performance, enabling reliable connection of remote I/O stations to an AC 800M controller in harsh industrial environments.

Specifications

• Manufacturer: ABB

• Model Number: TB820

• Order Number: 3BSE008555R1

• Product Type: ModuleBus Cluster Modem

• Communication Media: Fiber Optic (ST Connectors)

• Maximum Distance: 15m with Plastic Fiber (POF); up to 200m with HCS Fiber

• Power Supply: 24V DC (nominal)

• Current Consumption: 150 mA

• Mounting: 35mm DIN Rail

• Weight: 0.25 kg

• Operating Temperature: 0 to +55°C

Features

• Extended Networking: Allows for the expansion of a single controller’s ModuleBus to multiple remote clusters across a plant site.

• Optical Isolation: Protects the controller and local bus from ground loops and electrical surges by providing physical separation via fiber optics.

• EMI/RFI Immunity: Ensures reliable data exchange in areas with high electrical noise, such as near large motors or power switchgear.

• Seamless Scalability: Supports the interconnection of up to seven clusters in a single system branch for flexible hardware distribution.

• Hot-Swap Support: Facilitates system maintenance by allowing modules to be handled without disrupting the entire communication backbone.

• Diagnostic Monitoring: Integrated front-panel LED indicators provide real-time status for power supply and bus activity to simplify troubleshooting.