Product Details
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
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Manufacturer: ABB
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Model Number: TB820
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Order Number: 3BSE008555R1
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Product Type: ModuleBus Cluster Modem
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Communication Media: Fiber Optic (ST Connectors)
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Maximum Distance: 15m with Plastic Fiber (POF); up to 200m with HCS Fiber
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Power Supply: 24V DC (nominal)
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Current Consumption: 150 mA
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Mounting: 35mm DIN Rail
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Weight: 0.25 kg
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Operating Temperature: 0 to +55°C
Features
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Extended Networking: Allows for the expansion of a single controller’s ModuleBus to multiple remote clusters across a plant site.
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Optical Isolation: Protects the controller and local bus from ground loops and electrical surges by providing physical separation via fiber optics.
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EMI/RFI Immunity: Ensures reliable data exchange in areas with high electrical noise, such as near large motors or power switchgear.
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Seamless Scalability: Supports the interconnection of up to seven clusters in a single system branch for flexible hardware distribution.
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Hot-Swap Support: Facilitates system maintenance by allowing modules to be handled without disrupting the entire communication backbone.
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Diagnostic Monitoring: Integrated front-panel LED indicators provide real-time status for power supply and bus activity to simplify troubleshooting.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.
Mastering Wire Identification in Industrial Automation: The Power of Ferrules and Cross-Ferruling
Proper wire labeling forms the cornerstone of reliable control system installation and long-term maintenance. In complex industrial automation environments, technicians terminate thousands of conductor ends inside control panels, marshalling racks, and field junction boxes. Ferrules serve as individual tube-shaped sleeve markers slipped onto conductors before final termination. While technicians historically relied on pre-printed individual letter rings, modern control panel builders utilize automated ferrule printing machines. These thermal-transfer printers generate durable, single-sleeve heat-shrink tags directly matching approved wiring schematics, significantly accelerating cabinet assembly workflows.