ABB TU552-CS31 Terminal Unit

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ABB TU552-CS31 Terminal Unit

Product Description

The ABB TU552-CS31 Terminal Unit is a central control unit designed for industrial automation systems. It supports CS31 bus communication (based on RS-485) and is widely used in distributed control systems (DCS) and PLC applications.

With a modular design, the TU552-CS31 enables easy system expansion and maintenance, making it suitable for power plants, petrochemical facilities, manufacturing, and water treatment systems.

Technical Specifications

• Model: TU552-CS31

• Bus Type: CS31 Bus (RS-485 based)

• Operating Voltage: 24V DC (typical)

• Communication Speed: Up to 1.5 Mbps (system-dependent)

• Protection Rating: IP20 (for cabinet installation)

• Operating Temperature: -25°C to +70°C

• Storage Temperature: -40°C to +85°C

• Humidity: ≤95% (non-condensing)

• Mechanical Endurance: ≥50,000 mating cycles

• Mounting: DIN rail

Key Features & Advantages

1. High Reliability: Industrial-grade components ensure stable operation in harsh environments.

2. Modular Design: Supports distributed I/O expansion for flexible system scaling.

3. Fast Communication: CS31 bus enables real-time data exchange for control systems.

4. Hot-Swappable: Modules can be replaced without system shutdown.

5. Strong Compatibility: Integrates with ABB System 800xA, AC31 PLC, and more.

Application Fields

• Power Industry: Power plant monitoring, substation automation

• Oil & Gas: Process control, safety interlock systems

• Manufacturing: Production line automation, robotics

• Water Treatment: Pump station control, sewage management

• Building Automation: HVAC system control

Usage Precautions

1. Installation Environment: Avoid dust, moisture, and corrosive gases; ensure proper ventilatio.

2. Wiring Standards: Follow the manual for CS31 bus connections; terminal modules require termination resistors.

3. ESD Protection: Use anti-static wrist straps to prevent electronic damage.

4. Periodic Inspection: Check terminal tightness to prevent loose connections due to vibration.

5. Qualified Personnel: Installation and maintenance should be performed by trained ABB system technicians.

The structure and details of the product：

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