Yokogawa SDV144-S33

Description:

The Yokogawa SDV144-S33 Digital Input Module is used a 16-channel discrete input module used in Yokogawa CENTUM VP and ProSafe-RS systems. It receives no-voltage (dry contact) signals from field devices and converts them into digital signals for control system processing. The module is designed for high-reliability industrial applications and supports redundant system configurations.

Applications:

The Yokogawa SDV144-S33 is used in industrial automation systems to monitor ON/OFF signals from field equipment such as switches, relays, and sensors. It is commonly deployed in oil & gas, LNG plants, power generation, and chemical processing. The module enables real-time monitoring of alarms, interlocks, and equipment status for safe and stable operation.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: SDV144-S33
• Product Type: Digital Input Module
• Number of Channels: 16-channel, module isolation
• Input Signal Type: No-voltage contact (dry contact)
• ON Resistance: ≤1 kΩ
• OFF Resistance: ≥100 kΩ
• Input Current: ~6 mA ±20% (per channel)
• Contact Rating: 24 VDC (+20% / -10%), ≥10 mA
• External Power Supply: 24 VDC (+20% / -10%), ~200 mA
• Max Input Voltage: 30 VDC
• Response Time: ≤40 ms
• Isolation: 2 kV AC between input and system
• Mounting: Rack-mounted (FIO / safety node unit)
• Function: Converts discrete field signals into digital system inputs

Common Replacements:

• Yokogawa SDV144-S63 (direct replacement, newer model)
• Yokogawa SDV144-S13 (alternate configuration)
• Yokogawa SDV541 (digital output counterpart)