Yokogawa SDV144-S53/B4D00 16-Channel Isolated Digital Input Module

Product Description

The SDV144-S53/B4D00 digital input module from Yokogawa is designed for dependable acquisition of discrete field signals in safety-related and mission-critical control architectures. Built for use within Yokogawa safety and process automation platforms, this module ensures stable detection of dry contact inputs while maintaining strict electrical isolation between channels and the system backplane.

Operating from an external 24 V DC supply, the module accepts no-voltage (dry contact) signals and converts them into robust logic inputs suitable for Safety Instrumented Systems and high-availability process control environments. Its design emphasizes noise immunity, predictable response behavior, and long-term operational stability under harsh industrial conditions.

Key Technical Characteristics

The SDV144-S53/B4D00 provides sixteen independent input points, each electrically isolated to minimize cross-channel interference and ground loop risks. Input circuitry is optimized for dry contact monitoring, ensuring reliable ON/OFF discrimination even in electrically noisy installations.

Response timing is tuned for safety and process use, balancing fast signal recognition with filtering to avoid false triggering. High dielectric strength between field wiring and internal logic supports use in regulated safety systems.

Technical Specifications

• Model: SDV144-S53/B4D00
• Manufacturer: Yokogawa
• Module Category: Digital Input
• Channel Count: 16 isolated inputs
• Supported Input Type: No-voltage (dry contact) signals
• ON State Resistance: ≤ 1 kΩ
• OFF State Resistance: ≥ 100 kΩ
• Nominal Input Current: Approx. 6 mA at 24 V DC
• Rated Contact Voltage: 24 V DC (+20% / −10%)
• Minimum Contact Current: 10 mA
• External Supply Voltage: 24 V DC (+20% / −10%)
• External Supply Current Requirement: Approx. 200 mA
• Maximum Permissible Input Voltage: 30 V DC (momentary)
• Input Signal Processing Delay: ≤ 40 ms
• Isolation Withstand Voltage: 2 kV AC for 1 minute (input to system)
• Dimensions: 130 × 32.8 × 107.5 mm
• ​Weight: 0.36 kg

Application Scenarios

This module is commonly deployed in Safety Instrumented Systems, emergency shutdown circuits, burner management systems, and critical interlock monitoring. Typical industries include oil and gas production, petrochemical processing, power generation, and large-scale chemical manufacturing where deterministic digital input handling is essential.

FAQ

What type of field signals does this module accept? It is intended for dry contact or no-voltage digital signals and is not designed for sourcing or sinking powered inputs.

Is channel-to-channel isolation provided? Yes, each input channel is electrically isolated, reducing susceptibility to electrical noise and wiring faults.

Can it be used in redundant system configurations? The module supports use in redundant safety and control architectures when installed in compatible Yokogawa systems.