ABB TB521-ETH
ABB TB521-ETH
ABB TB521-ETH

ABB TB521-ETH | AC500 Series Ethernet Communication Module for Industrial Automation

Brand:​ ABB
Model:​ TB521-ETH
Product Type:​ Ethernet Communication Module
Series:​ ABB AC500 (Industrial PLC Family)
Core Function:​ Provides high-speed Ethernet communication for ABB AC500 PLCs, enabling seamless integration with industrial networks (e.g., SCADA, HMIs, third-party controllers) via Modbus TCP/IP and EtherNet/IP protocols. It serves as a critical expansion module for upgrading AC500 systems to Ethernet-based architectures.
Key Specs:​
  • Communication Protocols:​ Modbus TCP/IP, EtherNet/IP
  • Ports:​ 2× RJ45 (10/100 Mbps, auto-sensing)
  • Power Supply:​ 24 V DC (19.2–30 V DC range)
  • Operating Temperature:​ -25°C to +60°C (-13°F to 140°F)
  • Protection Rating:​ IP20 (front panel)
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Description

TB521-ETH: Product Overview​
The ABB TB521-ETH​ is an industrial-grade Ethernet communication module designed exclusively for ABB’s AC500​ series of programmable logic controllers (PLCs). As a key component of the AC500 ecosystem, it enables Ethernet connectivity for legacy and modern AC500 systems, bridging the gap between traditional serial communication and high-speed industrial networks.
Role in Automation Systems:​
Positioned as an Ethernet expansion module, the TB521-ETH performs three primary functions:
  1. Network Integration:​ Connects AC500 PLCs to Ethernet networks, allowing data exchange with SCADA systems, HMIs, and third-party devices (e.g., Siemens S7-1200 PLCs).
  2. Protocol Translation:​ Supports Modbus TCP/IP and EtherNet/IP protocols, enabling seamless communication with devices from different vendors.
  3. Data Aggregation:​ Collects data from AC500 I/O modules and transmits it to higher-level systems, while receiving control commands from the network.
Core Functionality:​
  • High-Speed Communication:​ Dual RJ45 ports support 10/100 Mbps Ethernet, ensuring fast data transmission for real-time process control.
  • Plug-and-Play Compatibility:​ Fits into AC500 PLC base units via a backplane connector, requiring no additional wiring or configuration.
  • Diagnostic Indicators:​ Built-in LEDs provide real-time feedback on power status, link activity, and communication errors, simplifying troubleshooting.
Platform Benefits (AC500 Series):​
The TB521-ETH leverages ABB’s AC500 platform, which is renowned for:
  • Scalability:​ Supports expansion from small (10 I/O points) to large (1000+ I/O points) systems, adapting to growing operational needs.
  • Reliability:​ Industrial-grade components and a rugged design ensure 24/7 operation in harsh environments (e.g., high temperature, vibration).
  • Legacy Support:​ Compatible with older AC500 models (e.g., AC500-eco), enabling phased modernization of existing systems.

    ABB TB521-ETH

    ABB TB521-ETH

Technical Specifications​
Model Number:​ TB521-ETH
Manufacturer:​ ABB
Product Type:​ Ethernet Communication Module
  • Communication Protocols:​ Modbus TCP/IP, EtherNet/IP
  • Port Type:​ 2× RJ45 (10/100 Mbps, auto-sensing)
  • Power Supply Voltage:​ 24 V DC (19.2–30 V DC range)
  • Current Consumption:​ 250 mA (typical)
  • Isolation Voltage:​ 500 V (logic to communication circuits)
  • Operating Temperature:​ -25°C to +60°C (-13°F to 140°F)
  • Storage Temperature:​ -40°C to +85°C (-40°F to 185°F)
  • Humidity:​ 5–95% non-condensing
  • Dimensions (W×H×D):​ 45 mm × 100 mm × 70 mm (1.77 in × 3.94 in × 2.76 in)
  • Weight:​ 0.2 kg (0.44 lbs)
  • Certifications:​ CE, UL, cULus, RoHS
Core Features & Customer Value​
1. Seamless Ethernet Integration:​
The TB521-ETH’s support for Modbus TCP/IP and EtherNet/IP protocols allows it to integrate with a wide range of industrial networks. For example, in a manufacturing plant, it can connect an AC500 PLC to a SCADA system, enabling real-time monitoring of production lines.
2. High Reliability in Harsh Environments:​
The module’s industrial-grade design (e.g., rugged housing, wide temperature range) ensures reliable operation in harsh environments. In a steel mill, it can withstand high temperatures and vibration, maintaining communication with the AC500 PLC.
3. Easy Installation & Troubleshooting:​
The plug-and-play design and diagnostic LEDs simplify installation and maintenance. Technicians can quickly identify communication errors using the LEDs, reducing downtime.
4. Cost-Effective Modernization:​
By adding Ethernet connectivity to existing AC500 systems, the TB521-ETH eliminates the need to replace the entire PLC system. This reduces upgrade costs and extends the lifespan of existing equipment.

ABB TB521-ETH

ABB TB521-ETH

Typical Applications​
The ABB TB521-ETH​ is widely used in industries requiring Ethernet communication for AC500 PLCs:
  1. Factory Automation:​
    • Connects AC500 PLCs to SCADA systems for real-time monitoring of assembly lines.
    • Example: In an automotive plant, the TB521-ETH transmits data from an AC500 PLC to a SCADA system, enabling operators to monitor robot movements.
  2. Process Control:​
    • Integrates AC500 PLCs with HMIs for operator interface in chemical plants.
    • Example: In a petrochemical refinery, the TB521-ETH connects an AC500 PLC to an HMI, allowing operators to adjust valve positions.
  3. Machine Building:​
    • Adds Ethernet connectivity to AC500 PLCs in packaging machines.
    • Example: In a food packaging plant, the TB521-ETH enables an AC500 PLC to communicate with a vision system, ensuring accurate product labeling.

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