ABB 1SVP426471R1000 TU512 terminal base expansion unit
1SVP426471R1000 is TU512 terminal base expansion unit under ABB S500 series, matched with Freelance DCS and AC500 PLC I/O modules including DI,DO and AI/AO cards. It serves as intermediate wiring carrier between core I/O electronic module and field site cables, realizing expandable field wiring layout. Original new and fully inspected refurbished products are used for DCS cabinet assembly and obsolete automation system spare replacement.
Description
Product Introduction
1SVP426471R1000 is TU512 terminal base expansion unit under ABB S500 series, matched with Freelance DCS and AC500 PLC I/O modules including DI,DO and AI/AO cards. It serves as intermediate wiring carrier between core I/O electronic module and field site cables, realizing expandable field wiring layout. Original new and fully inspected refurbished products are used for DCS cabinet assembly and obsolete automation system spare replacement.
Model Definition
1SVP is unified part number prefix for ABB S500 series terminal base coding. 426471 stands for fixed hardware code corresponding to TU512 terminal base. Suffix R1000 denotes revised hardware structure with built-in fuse holder layout, different from standard R0000 version without fuse configuration. TU512 is official type designation of this expansion terminal unit.
Technical Specifications
Equipped with 16 groups of DC24V signal terminal wiring positions, built-in independent 5×20mm cartridge fuse seat with rated fuse specification 8A. Working auxiliary power DC24V, operating ambient temperature -20℃~+60℃, storage temperature -40℃~+85℃, relative humidity 5%~95% non-condensing. DIN rail snap-on mounting, protection class IP20, CE and UL certified, net weight 230g, manufactured in Germany.
Interface and Communication Configuration
Rear side locking buckle and pin connector for mechanical clamping and signal docking with upper I/O electronic module. Front side spring-type screw terminal blocks for field sensor, actuator and power wiring access. No independent bus communication circuit, all signal transmission depends on mated upper I/O module and rack backplane bus.
Core Functions
Provide centralized wiring terminal for matched S500 I/O modules, divide field loop circuit with built-in fuses to realize overload short-circuit protection for each channel circuit. Expand wiring space to optimize cabinet internal cable arrangement, facilitate on-site wiring maintenance and channel troubleshooting without dismounting core I/O electronic card.
Application Scenarios
Installed inside DCS control cabinets of thermal power, chemical industry, metallurgy and municipal wastewater treatment plants, paired with DI524,DO526 and AO523 modules for field discrete signal and analog signal wiring transition of pumps, valves, flow and pressure detection instruments.
Operation and Maintenance Instructions
Cut off rack DC24V power before detaching terminal base or replacing channel fuses and wait residual voltage release. Check fuse integrity and terminal tightness semi-annually, blow away terminal dust with dry low-pressure compressed air. Replace blown fuse with standard 8A specification strictly, avoid oversized fuse to prevent circuit burnout and equipment damage.
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