The Yokogawa STA4D-00 S2, also cataloged as the STA4D-00 S2 Pressure Clamp Terminal Block, operates as a dedicated hardware component for high-integrity field signal routing and dual-redundant termination within ProSafe-RS and CENTUM distributed control networks. The assembly establishes direct physical and electrical contact connection channels natively at the hardware tier to transition external sensor loops into automated system cabinet buses.
Hardware Specifications
Parameter
Specification
Model
STA4D-00 S2
Brand
Yokogawa
Series
ProSafe-RS / CENTUM Control Systems
Origin
Japan
Weight
0.24 kg net physical component mass
Estimated Shipping Dimensions
3.2 cm x 10.6 cm x 13 cm (Width x Height x Depth)
Termination Architecture
Dual-redundant pressure clamp mechanical matrix
Rated Voltage
300 V AC/DC maximum operational limit
Current Rating
10 to 20 A absolute continuous current density range
Contact Resistance
<= 5 mΩ internal path electrical resistance limit
Isolation Voltage
500 V AC continuous dielectric barrier rating
Contact Material
High-conductivity tin-plated copper alloy base
Operating Temp
-40 to +85 deg C continuous operational envelope
Tariff Code
8537101190
Product Type
Terminal Block Modules
High-Reliability Safety Control (SIS)
SIL3 Architecture Compatibility and Dual Redundancy Gating The terminal block features an integrated dual-redundant circuit layout configured to prevent single-point connection cuts from dropping critical safety loops. This internal design feeds parallel physical pathways directly into the system's I/O modules, enabling the hardware to operate cleanly alongside emergency shutdown (ESD) networks or triple modular redundancy (TMR) architectures without introducing signal drift.
Galvanic Isolation Boundaries and Fail-Safe State Paths The sub-assembly maintains a 500 V AC dielectric isolation barrier between independent conductor tracks natively at the hardware tier. This high-insulation barrier contains high-voltage inductive surges and blocks field ground loop spikes from spreading through the internal cabinet traces, preserving signal parameters to ensure predictable fail-safe state execution during critical plant trips.
