ABB TB820-1 3BSE008556R1 Terminal Unit

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Product Model

ABB TB820‑1 Terminal Unit (3BSE008556R1)

Product Overview

The ABB TB820‑1 is an industrial terminal unit used in ABB S800 series I/O systems. It connects control units to I/O module clusters, providing power distribution, signal transmission, and monitoring. The module features a modular, plug-in design, supporting both electrical and fiber optic bus communication. It can be easily integrated into control cabinets or distributed control systems, enhancing system reliability and scalability.

Technical Specifications

• Model: TB820‑1 (3BSE008556R1)

• Type: Terminal Unit

• Mounting: DIN rail, modular plug-in design

• Supply Voltage: +24 V DC

• Supported I/O Module Clusters: Up to 12 modules via electrical bus, up to 7 clusters via fiber optic bus

• Communication Interface: Electrical ModuleBus / Fiber ModuleBus

• Ambient Temperature: 0°C – +55°C

• Protection Rating: IP20 (for control cabinet installation)

• Dimensions: approx. 58 mm × 122 mm × 170 mm

• Weight: approx. 0.3 kg

• Status Indicators: LED for power, communication, and fault

Features and Advantages

1. Modular Design: DIN rail mounting allows easy replacement and expansion in control cabinets.

2. Multi-Bus Support: Supports electrical and fiber optic ModuleBus for stable communication.

3. High Expandability: Supports multiple I/O module clusters for distributed system expansion.

4. Power and Fault Monitoring: Provides power status monitoring and fault indication LEDs for enhanced safety.

5. Industrial Reliability: EMI-resistant design suitable for harsh automation environments.

6. Strong System Compatibility: Compatible with ABB S800 series I/O systems and distributed control architectures.

Application Areas

• I/O module cluster interface in industrial automation systems

• Field module interface in distributed control systems (DCS)

• Control cabinets and automated production lines

• Power, petrochemical, metallurgical, and chemical process control systems

Precautions

1. Disconnect power before installation to ensure safety.

2. Follow terminal labels and wiring diagrams carefully to avoid short circuits or communication errors.

3. Keep the environment ventilated and dry, avoiding high temperature, humidity, and corrosive gases.

4. Correctly set module cluster addresses in multi-cluster or remote configurations to avoid conflicts.

5. Regularly check terminal tightness and status indicators to ensure reliable operation.

6. Installation, commissioning, and maintenance should be performed by qualified personnel.

The structure and details of the product：

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