YOKOGAWA SDV144-S33 16-Channel Isolated Digital Input Module

Product Description

The SDV144-S33 is a high-performance safety-grade digital input module manufactured by Yokogawa, specially engineered for ProSafe-RS safety instrumented systems and Centum VP DCS 

control platforms. This module is responsible for acquiring on-site switch status, equipment feedback and emergency signal inputs, providing full electrical isolation for each channel to avoid signal 

interference. With real-time self-diagnosis functions, it ensures accurate and reliable signal transmission for plant ESD protection, fire and gas monitoring, and safety interlock logic. Widely used in 

chemical, energy, offshore and power generation industries, it is a core replacement spare part for aging Yokogawa safety control racks.

Technical Specifications

Full Model: SDV144-S33 Brand: YOKOGAWA, Origin: Japan Applicable System: ProSafe‑RS SIS Safety System, Centum VP DCS System Module Type: Safety Digital Input I/O Module Channel 

Quantity: 16 isolated input channels Signal Type: Dry contact discrete input signal Operating Voltage: 24 VDC system power Safety Certification: SIL 3 industrial safety level Response Speed: 

Fast signal sampling & response Installation Method: Standard rack-mounted, hot-swappable compatible Operating‑Temperature: -20℃ ~ +70℃ Storage‑Temperature: ‑40℃ ~ +85℃ 

Ambient Humidity: 5%‑95% non‑condensing Net Weight: Approx. 0.36 kg

Key Features

Professional safety-level design compliant with industrial SIL3 safety standards Independent isolated channel design improves anti-interference ability and signal stability Real-time self-diagnosis f

unction automatically detects channel faults and module exceptions Supports online hot-swap replacement to reduce system maintenance downtime Perfect compatibility with Yokogawa ProSafe-RS 

and Centum VP mainstream systems Compact industrial structure, suitable for long-term stable operation in harsh factory environments High-precision signal collection ensures safe and stable 

interlock control of production equipment Reliable stock spare part for system upgrade, overhaul and failure replacement