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Product Overview
The ABB TB521-ETH 1SAP112100R0270 Terminal Base is a high-performance terminal unit designed for the efficient and secure connection of I/O modules within ABB’s AC500 and AC500-S safety PLC systems. As a critical component in distributed automation architectures, the TB521-ETH facilitates robust communication over Ethernet, enabling fast, secure data transfer between control units and I/O devices.
Built with industrial-grade durability, the TB521-ETH ensures maximum reliability and uptime, even in harsh environmental conditions. Its compact design enables easy mounting and integration into existing control systems, while its modular structure promotes scalability and serviceability. The terminal base offers a firm foundation for field wiring, ensuring safe signal and power distribution across automation applications.
Key Features
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Designed for ABB AC500/AC500-S PLC systems
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Integrated Ethernet communication interface
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DIN rail mountable with secure locking
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Facilitates signal and power distribution for I/O modules
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Robust design for industrial environments
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Simplified field wiring with labeled terminals
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Supports hot-swapping of modules
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Compact and space-efficient for cabinet installations
Technical Specifications
| Item | Specification |
|---|---|
| Product Code | 1SAP112100R0270 |
| Product Name | TB521-ETH |
| Product Type | Terminal Base with Ethernet Interface |
| Communication Interface | Ethernet (Industrial) |
| Supported Systems | ABB AC500 / AC500-S PLC Systems |
| Mounting Type | DIN Rail |
| Connection Type | Screw-type terminal connectors |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Protection Class | IP20 |
| Relative Humidity | 5% – 95% (non-condensing) |
| Power Supply | Supplied via backplane or external source |
| Dimensions | 28 x 135 x 123.5mm |
| Weight | 0.186 kg |
| Housing Material | High-grade industrial thermoplastic |
| Standards Compliance | CE, RoHS, UL, cUL, ATEX (when applicable) |
| Configuration Method | Via PLC programming environment (e.g., Control Builder) |
Industry Applications
The ABB TB521-ETH Terminal Base is widely used across a range of industries due to its reliability, modularity, and communication capability. Applications include:
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Process Automation: Refineries, chemical plants, and water treatment facilities
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Manufacturing: Assembly lines, robotic systems, and packaging automation
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Utilities: Power distribution, energy management, and smart grids
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Transportation: Railway signaling systems, airport baggage handling
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Oil & Gas: Offshore platforms, pipeline control systems
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Pharmaceuticals: Cleanroom automation, batch control systems
Product Advantages
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High Integration Capability: Seamlessly connects with ABB’s AC500 and AC500-S systems
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Industrial-Grade Durability: Built to operate in demanding environmental conditions
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Secure Data Transmission: Ethernet interface ensures reliable, high-speed communication
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Compact Footprint: Saves cabinet space with its space-optimized design
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Easy Maintenance: Hot-swappable functionality reduces downtime
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Simplified Wiring: Clearly labeled terminals support intuitive and error-free connections
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Long-Term Reliability: Designed for extended operational life with minimal maintenance
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Future-Proof: Compatible with future ABB automation modules
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Certified Compliance: Meets international safety and performance standards
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Flexible Installation: Can be deployed in decentralized or centralized control configurations
Frequently Asked Questions (FAQ)
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What PLC systems is the TB521-ETH compatible with?
The TB521-ETH is compatible with ABB’s AC500 and AC500-S PLC families. -
Does the terminal base support Ethernet communication?
Yes, it features an integrated Ethernet interface for high-speed data exchange. -
Can I hot-swap modules connected to this terminal base?
Yes, the TB521-ETH supports hot-swapping of I/O modules without system shutdown. -
What type of terminal connections does the unit support?
It uses screw-type connectors for secure and durable field wiring. -
What is the protection rating of the TB521-ETH?
The unit has an IP20 protection rating suitable for control cabinet environments. -
What is the operating temperature range for the TB521-ETH?
It operates reliably between -25°C and +70°C. -
Is this terminal base suitable for hazardous environments?
Yes, it complies with ATEX standards when used in appropriate systems. -
Can the TB521-ETH be mounted on any DIN rail?
Yes, it is designed for standard DIN rail mounting. -
How is the power supplied to the unit?
Power can be supplied via the system backplane or externally depending on system configuration. -
Is there any configuration required after installation?
Yes, configuration is typically performed using ABB’s programming tools like Control Builder.
Related Models
| Model Number | Description |
|---|---|
| TB511-ETH-XC | Extended Condition Ethernet Terminal Base |
| TB521-ETH | Standard Ethernet Terminal Base for AC500-S |
| TB511-ETH | Compact Ethernet Terminal Base |
| PM573-ETH | CPU module with integrated Ethernet interface |
| CI581-ETHCAT | Ethernet/IP and EtherCAT communication interface |
| PM592-ETH | Advanced performance CPU with Ethernet |
Popular ABB Modules
| Model Number | Description |
|---|---|
| PM564-TP-ETH | AC500 CPU with integrated Ethernet and TP port |
| AI581-S | Safety Analog Input Module |
| CI522-MODTCP | MODBUS TCP Communication Interface |
| FS-TSRO-0824 | Digital Output Field Termination Assembly |
| FS-USI-0001 | Universal Safety Interface Module |
| FC-QPP-0001 | Quad Processor Cluster Module |
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