Digital guide
You are here:
Yokogawa SealSAI143‑SS3
- Product Name: SealSAI143‑SS3 Sealed Analog Input Module
- Product Series: Centum VP Series Explosion‑Proof / Sealed I/O Module
- Product Brief Introduction: Fully sealed intrinsically safe analog input module independently developed by Yokogawa, designed for hazardous industrial areas with explosive gas or dust risks, used for safe collection of analog signals in explosive environments.
Detailed content
- Technical Specifications:
- Input Signal: 4–20 mA DC intrinsically safe analog input signals
- Number of Channels: 8 isolated input channels
- Sealing Grade: Fully hermetic sealed structure, IP67 protection grade
- Explosion‑Proof Standard: IECEx, ATEX intrinsically safe certification (Ex ia IIC T4 Ga)
- Isolation Performance: Channel‑to‑channel galvanic isolation, system‑side isolation
- Operating Voltage: 24 V DC (20.4–28.8 V DC)
- Operating Temperature: −20 °C to +60 °C
- Anti‑corrosion Grade: SS3 high‑grade anti‑corrosion sealing treatment
- Functional Features: Intrinsically safe signal processing, over‑current/over‑voltage protection, open‑circuit detection, hot‑swap support, hazardous area signal isolation, self‑diagnosis function.
- Performance Parameters: Measurement accuracy ≤ ±0.1% FS, isolation voltage 2500 V AC, long‑term anti‑corrosion performance for salt‑fog and chemical vapor environments, zero drift ≤ 0.05% FS per year.
- Material Composition: Stainless steel sealed housing, high‑temperature and corrosion‑resistant epoxy potting material, intrinsically safe electronic circuit components, sealed gold‑plated terminals.
- Structural Characteristics: Fully encapsulated sealed structure, DIN‑rail mounting, anti‑explosion and anti‑corrosion integrated design, built‑in pressure‑relief and anti‑leakage structure.
- Working Principle: Collects intrinsically safe analog signals from field hazardous‑area transmitters through sealed isolated circuit, converts to digital signals and transmits to the control system, isolates high‑energy signals to prevent explosion risks.
- Advantage Highlights: Full sealing and anti‑corrosion, intrinsically safe explosion‑proof certification, high‑precision signal acquisition, adaptability to harsh hazardous environments, long service life, maintenance‑free sealed structure.
- Applicable Industries: Offshore oil and gas platforms, petrochemical refineries, natural gas processing plants, coal chemical industry, explosive‑gas‑class hazardous industrial sites.
- Installation Requirements: DIN‑rail mounting in non‑hazardous control cabinet, intrinsically safe wiring must follow IEC explosion‑proof standards, maintain sealed terminal integrity during installation.
- Usage Precautions: Do not open the sealed housing arbitrarily, strictly use certified intrinsically safe field devices, avoid mechanical impact damage to the shell, regularly check terminal sealing performance.
