DCS & PLC Wiring Solution – Yokogawa STA4S-00 S1 | STA Series
Where This Product Is Used
The Yokogawa STA4S-00 S1 pressure clamp terminal block is engineered for demanding industrial wiring environments where reliable, maintenance-free conductor termination is critical. Typical deployment sites include:
- DCS marshalling cabinets – CENTUM VP / CS 3000 field junction panels
- PLC control panels – MELSEC, Siemens S7, Allen-Bradley ControlLogix I/O racks
- Process instrumentation loops – 4–20 mA transmitter field wiring termination
- Motor control centers (MCC) – auxiliary control circuit wiring
- Hazardous area junction boxes – Ex-rated enclosures requiring tool-free re-termination
- Railway & power distribution panels – vibration-prone environments demanding screwless retention
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | STA4S-00 S1 |
| Series | STA (Pressure Clamp / Screwless) |
| Manufacturer | Yokogawa Electric Corporation |
| Terminal Type | Pressure Clamp (Spring-Cage / Screwless) |
| Rated Cross-Section | 0.2 – 4 mm² (AWG 24–12) |
| Rated Voltage | 800 V (IEC) / 600 V (UL) |
| Rated Current | 32 A |
| Connection Method | Screwless push-in / pressure clamp |
| Conductor Type | Solid, stranded, fine-stranded (with ferrule) |
| Mounting | DIN rail (EN 60715 TH 35) |
| Housing Material | PA 66 (UL 94 V-0 flame retardant) |
| Contact Material | Copper alloy, tin-plated |
| Operating Temperature | -50 °C to +120 °C |
| Protection Degree | IP 20 |
| Weight | ~300 g (per pack) |
| Color | Gray (S1 suffix) |
Why Engineers Specify This Model
- Zero-screw reliability – Spring-cage mechanism maintains constant contact force; immune to vibration-induced loosening that plagues screw terminals in rotating machinery environments.
- Faster panel build time – Pressure clamp insertion is up to 4× faster than screw termination; no torque wrench required, eliminating over/under-torque defects.
- Yokogawa ecosystem compatibility – Dimensionally matched to Yokogawa CENTUM VP I/O marshalling standards; simplifies BOM alignment for brownfield DCS expansions.
- Long service life – Tin-plated copper alloy contacts rated for 50+ insertion cycles without measurable contact resistance degradation.
- Compact pitch – High packing density reduces cabinet footprint, critical in offshore platform and skid-mounted control panels where space is at a premium.
Complete System Bill of Materials
For a fully functional DCS marshalling row, engineers typically combine:
- STA4S-00 S1 – Standard feed-through terminal (this item)
- STA4S-PE S1 – Protective earth (PE) terminal, green/yellow
- STA4S-D S1 – Double-deck terminal for signal + shield drain
- STAB 3.5/6 – End stop / partition plate
- STABU 3.5 – End bracket / retaining clip
- STB 3.5 – Jumper bridge (2–10 pole) for common bus wiring
- STBE 3.5 – Marker carrier strip (compatible with Yokogawa label printers)
Compliance & Industry Standards
- IEC 60947-7-1 (Low-voltage switchgear – terminal blocks for copper conductors)
- UL 508 (Industrial Control Equipment)
- CSA C22.2 No. 158
- EN 60715 DIN rail mounting compatibility
- RoHS 2 Directive 2011/65/EU compliant
- ATEX / IECEx – consult Yokogawa for zone-rated variants
Quality Assurance & Sourcing
Konmask.com sources Yokogawa STA4S-00 S1 terminal blocks exclusively from authorized Yokogawa distributors and verified OEM surplus channels. Every unit undergoes:
- Visual inspection against Yokogawa factory markings and date codes
- Continuity and contact resistance verification (≤ 5 mΩ per IEC 60947-7-1)
- Dimensional check against Yokogawa published drawings
- Anti-static packaging with humidity indicator card
Traceability documentation (CoC, packing list, test report) available upon request for IEC 61511 / SIL-rated loop applications.
How to Source This Part
Ready to order or need a volume quote? Contact our industrial components team:
- Email: support@konmask.com
- Phone / WhatsApp: +0086 19859288691
- Lead time: In-stock items ship within 1–3 business days; ex-factory orders 2–4 weeks
- MOQ: 1 piece (sample orders welcome)
- Payment: T/T, PayPal, credit card via Shopify Payments
- Export: DDP / DAP worldwide; HS Code 8538.90 (terminal blocks)
Application-Specific FAQ
Q: Is STA4S-00 S1 compatible with Yokogawa CENTUM VP FIO field terminal units?
A: Yes. The STA Series pitch and DIN rail footprint align with Yokogawa’s standard marshalling cabinet layouts used in CENTUM VP and CS 3000 systems.
Q: Can I use fine-stranded wire without a ferrule?
A: Yokogawa recommends using DIN 46228-4 ferrules for fine-stranded conductors to ensure optimal contact force distribution and prevent strand splaying.
Q: What is the difference between STA4S-00 S1 and STA4S-00 S2?
A: The S1 suffix denotes gray housing (standard signal wiring); S2 is blue (typically used for neutral conductors per IEC 60446 color coding conventions).
Q: Is this terminal block suitable for SIL 2 safety loops?
A: The STA4S series meets the mechanical and electrical requirements referenced in IEC 61511. Consult your SIL assessment engineer for loop-specific validation documentation.
Q: Do you supply the full STA Series range?
A: Yes. Konmask.com stocks the complete Yokogawa STA Series including PE, double-deck, fused, and disconnect variants. Contact us with your full BOM for a consolidated quote.
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Contact: support@konmask.com | +0086 19859288691
