Product Introduction
When expanding a distributed I/O system, managing multiple clusters over long distances can introduce signal integrity challenges. The ABB TB820V2 Cluster Modem I/O Module (3BSE013208R1) addresses this by providing a fiber optic interface to the ModuleBus, enabling reliable communication between parent controllers and remote I/O clusters. Part of the ABB S800 I/O family, this module acts as a slave on the optical ModuleBus, converting the electrical ModuleBus signals to optical for extended reach and noise immunity.
Technical Specifications Breakdown
The TB820V2 operates with a 24 V consumption of typ. 100 mA, ensuring low power draw for continuous operation. It features two fiber optic ports for connection to the optical ModuleBus, supporting up to seven clusters. The module includes a rotary switch to select its cluster number (1 to 7) on the optical bus. The electrical ModuleBus can connect up to 12 I/O modules locally. Environmentally, it operates from 0 to +55 °C (+32 to +131 °F) and stores from -40 to +70 °C (-40 to +158 °F). It carries CE marking, electrical safety certifications per EN 61010-1 and UL 61010-1, and hazardous location approvals including ATEX Zone 2 and C1 Div 2 cULus. Marine certificates include ABS, BV, DNV-GL, and LR. The protection class is IP20 according to EN60529 and IEC 529.
Industry Applications
In oil and gas facilities, the TB820V2 distributes I/O clusters across hazardous areas, leveraging its ATEX Zone 2 and C1 Div 2 certifications for safe operation. For marine vessels, its marine certificates (ABS, BV, DNV-GL, LR) make it suitable for engine room monitoring and cargo control systems. In chemical plants, the fiber optic interface isolates electrical noise and allows placement of I/O modules up to several hundred meters from the controller.
Installation & Setup Guidance
Mount the TB820V2 on a DIN rail within an IP20 enclosure. Connect the fiber optic cables to the two optical ports, ensuring clean connections and proper bend radius. Set the cluster number using the rotary switch (positions 1 to 7) before powering up. Connect the electrical ModuleBus to the I/O modules, respecting the 12-module limit per cluster. Verify power supply isolation as the module provides isolated power to I/O modules.
Maintenance & Reliability
Periodically inspect fiber optic connections for dust or damage. Verify the rotary switch setting matches the intended cluster number. Monitor ambient temperature; the module operates up to 55 °C (131 °F) for horizontal mounting and 40 °C (104 °F) for vertical mounting. The corrosion protection rating of ISA-S71.04: G3 ensures reliability in harsh environments. No internal adjustments are required.
Compatibility & Integration
The TB820V2 communicates via the ModuleBus protocol as a slave device. It integrates with ABB S800 I/O systems and compatible controllers that support the optical ModuleBus. The module does not support line redundancy, module redundancy, or hot swap. It is not used with HI Controller. For systems requiring more than 12 I/O modules, connect additional clusters via fiber optic links.
Selection Guide & Purchasing Advice
Before purchasing, verify that your controller supports the optical ModuleBus and that the cluster number is available. Confirm environmental conditions (temperature, humidity, corrosive atmosphere) fall within the module's specifications. SpareTechPLC offers the ABB TB820V2 with full traceability. Contact us to confirm lifecycle status and availability before ordering.
Frequently Asked Questions
Q: How many I/O modules can connect to one TB820V2 cluster?
A: Up to 12 I/O modules can connect to the electrical ModuleBus of one TB820V2 cluster.
Q: What is the maximum number of clusters on the optical ModuleBus?
A: The optical ModuleBus supports up to seven clusters, each with a unique cluster number set via the rotary switch.
Q: Does the TB820V2 support hot swapping of I/O modules?
A: No, the TB820V2 does not support hot swap functionality.
Q: What are the operating temperature limits?
A: The module operates from 0 to +55 °C (+32 to +131 °F), with approvals issued for +5 to +55 °C.
Q: Is the TB820V2 certified for hazardous locations?
A: Yes, it has ATEX Zone 2, C1 Div 2 cULus, and C1 Zone 2 cULus certifications.
