• PN: TB521-ETH, Order Code: 1SAP112100R0270
• Brand: ABB
• Series: AC500 V2 PLC System
• Type: CPU Terminal Base

• Function: Dedicated bottom base for AC500 series CPU modules, carrying the main processor and providing rich built-in communication interfaces and 2 expandable communication slots. It realizes program downloading, upper computer network communication, fieldbus data interaction and local I/O bus expansion, serving as the core carrier for PLC signal transmission, power supply and wiring connection in automation control cabinets

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Core Features

1. Onboard 1-channel 10/100Mbps RJ45 Ethernet interface, supports Modbus TCP, IP protocol for remote programming and SCADA data upload
2. Built-in 2-way software switchable RS232/RS485 serial ports, compatible with Modbus RTU and serial debugging communication
3. Reserved 2 independent communication expansion slots, can be plugged with Profibus, CANopen, additional Ethernet communication modules for multi-network expansion
4. Adopts spring-type quick wiring terminals for 24VDC power supply, wiring is stable and convenient without screwdriver
5. Supports local I/O bus expansion, can connect multiple AC500 series analog/digital I/O modules to realize distributed signal collection

6. Industrial-grade isolation design between communication port and backplane, strong anti-electromagnetic interference, suitable for harsh factory working conditions

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Technical Specs

• Rated Power Supply: 24VDC
• Built-in Interfaces: 1×RJ45 Ethernet, 2×RS232/RS485 serial ports, FBP fieldbus interface
• Expansion Slots: 2 communication module slots
• Installation: DIN rail TH35 standard mounting
• Operating Temperature: 0℃ ~ +60℃ (horizontal installation)
• Storage Temperature: -40℃ ~ +70℃, 5%~95% RH non-condensing
• Net Weight: 0.2kg
• Protection Grade: IP20
• HS Code: 85389091

• Certification: CE, UL certified

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Compatibility

• Applicable CPU: ABB PM571, PM572, PM581, PM582 series AC500 V2 processors
• Expandable Modules: CM574, CM577, CM578 series communication modules
• Supporting Equipment: AC500 standard I/O modules, HMI, upper SCADA/DCS systems

• Not Compatible: AC500-eCo, AC800M, INFI90 series racks and non-V2 version CPU

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Application

• Automatic control system construction for water treatment, metallurgy, chemical, packaging, HVAC industries
• PLC cabinet main station configuration with multi-network communication requirements
• Old AC500 PLC system renovation, faulty CPU base spare replacement

• Distributed field signal acquisition and remote centralized monitoring projects

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Our Advantage

• Communication port stability, wiring continuity and aging test completed before delivery
• 12-month warranty for new original and tested surplus bases