Yokogawa SDV144-S13/B4D00 | Digital Input Module

Overview

The Yokogawa SDV144-S13/B4D00 is a 16-channel digital input module developed for use in Yokogawa safety-oriented distributed control systems. Installed within Safety Node Units or Safety Control Units, this module provides dependable acquisition of discrete field signals while maintaining high electrical isolation and system integrity. Designed for continuous operation in critical environments, it supports redundancy and integrated diagnostics to reduce downtime and simplify maintenance.

Electrical and Functional Characteristics

The SDV144-S13/B4D00 is optimized for monitoring dry contact (no-voltage) inputs supplied by an external 24 V DC source. Each input channel is electrically isolated at the module level, ensuring fault containment and compliance with safety system requirements.

Key electrical behaviors include stable current sourcing, defined ON/OFF resistance thresholds, and protection against transient overvoltage conditions. The module supports rapid signal recognition with deterministic response timing, suitable for safety interlocks and status feedback.

Technical Specifications

• Model: SDV144-S13/B4D00
• Module Type: Digital input, module-isolated
• Number of Channels: 16
• Input Signal Type: Dry contact (no-voltage contact)
• ON State Resistance: ≤ 1 kΩ
• OFF State Resistance: ≥ 100 kΩ
• Input Current: Approx. 6 mA ±20% at 24 V DC (0 Ω input)
• External Supply Voltage: 24 V DC (+20% / −10%)
• External Supply Current Requirement: Up to 200 mA
• Rated Contact Load: Minimum 10 mA at 24 V DC
• Maximum Allowable Input Voltage: 30 V DC (non-continuous)
• Signal Response Time: Maximum 40 ms
• Isolation Strength: 2 kV AC between field inputs and system circuits (1 minute)
• Diagnostic Support: Short-circuit and open-circuit detection when used with SCB100 or SCB110
• Redundancy Capability: Supported via system configuration
• ​Dimensions: 130 × 32.8 × 107.5 mm
• Weight: 0.36 kg

Diagnostics and System Integrity

When paired with Yokogawa diagnostic terminal boards such as SCB100 or SCB110, the SDV144-S13/B4D00 enables continuous line monitoring. This allows early detection of wiring abnormalities, including open circuits and short circuits, improving plant safety and reducing troubleshooting time during commissioning or operation.

Application Scenarios

The SDV144-S13/B4D00 is commonly deployed in:

• Emergency shutdown systems
• Burner management systems
• Process interlock monitoring
• Plant-wide safety instrumentation
• Power generation and energy facilities
• Chemical, petrochemical, and refining plants

Its design aligns with environments requiring deterministic digital input handling and long-term operational stability.

Compatibility and Integration

This module is intended for Yokogawa safety architectures and integrates seamlessly into Safety Node Units and Safety Control Units. Modular construction allows straightforward replacement and supports redundant configurations for high-availability systems.

Frequently Asked Questions

Q: Does the SDV144-S13/B4D00 support voltage input signals? A: No. This module is designed exclusively for dry contact (no-voltage) inputs using an external 24 V DC supply.

Q: Can this module be used in redundant safety systems? A: Yes. Redundant operation is supported through system-level configuration in compatible Yokogawa safety systems.

Q: Is wiring fault detection built into the module? A: Diagnostic detection of open and short circuits is available when the module is used with supported diagnostic terminal boards such as SCB100 or SCB110.