Description

1. Product Title

ABB TU508-ETH – S500 Series Ethernet Communication Spring Terminal Base Unit for AC500 PLC

2. Product Overview

The ABB TU508-ETH is a dedicated terminal base (terminal unit) belonging to the ABB S500 I/O system, exclusively used to carry AC500 PLC Ethernet communication interface modules such as CI501-PNIO (Profinet IO) and CI511-ETHCAT (EtherCAT). It acts as the fixed wiring carrier, integrating dual onboard RJ45 Ethernet ports and 30 spring-cage field wiring terminals to realize bus backplane connection, Ethernet network access and 24VDC process power distribution in one compact unit. Adopting a split module + terminal base hot-swappable structure, the communication daughter card can be directly pulled out for replacement without disconnecting field cables or Ethernet network lines, drastically shortening system maintenance downtime. Standard spring screw terminals deliver anti-loosening wiring performance in vibration-intensive workshops, and built-in bus expansion interface supports cascading multiple S500 I/O stations to build distributed Ethernet fieldbus control architecture for ABB AC500 automation platforms.

3. Technical Specifications

• Brand: ABB
• Model: TU508-ETH
• Official Order Code: 1SAP214000R0001
• Warranty: One Year
• Condition: 100% New & Original
• Core Function: Terminal base for S500 Ethernet communication modules (CI501-PNIO / CI511-ETHCAT)
• Ethernet Interface: 2 × 10/100Mbps RJ45 ports with link/activity LED indicators
• Wiring Terminals: Total 30 spring-cage push-in terminals
  • Fixed 24VDC process power terminals (UP, UP3, 0V common ground)
  • Reserved signal terminals matched with inserted communication module
• Power Supply: 20.4 ~ 28.8 VDC DC power input
• Installation: Standard DIN rail mounting, optional wall mounting with TA526 accessory
• Protection Class: IP20 (for installation inside electrical control cabinet only)
• Operating Temperature (Standard Version): 0°C ~ +55°C XC rugged variant TU508-ETH-XC: -40°C ~ +70°C for extreme environments
• Bus Expansion: Left-side I/O backplane port for cascading additional S500 terminal bases
• Net Weight: Approximately 0.17 kg
• Compatible CPU: Perfectly matched with AC500 PM5630-2ETH, PM573, PM585 series PLC controllers
• 

5. Application Scenarios

1. Factory Distributed I/O Network: Build Profinet IO / EtherCAT high-speed fieldbus distributed I/O systems for packaging lines, automated assembly equipment and machine tools, connecting remote DX522 digital I/O modules.
2. Water & Wastewater Treatment Plants: Expand remote pump station I/O racks via industrial Ethernet, realize centralized SCADA monitoring and interlock control of valves, flow meters and liquid level sensors.
3. HVAC & Energy Management Systems: Deploy distributed S500 I/O stations for cooling tower, air handler and boiler auxiliary equipment, transmitting real-time operating data to upper monitoring system through Profinet.
4. Small Petrochemical Auxiliary Skids: Construct high-reliability Ethernet safety interlock control loops for pipeline cut-off valves, pressure switches and alarm output devices.