YOKOGAWA SDV144-S13 – S-series Digital Input Module for Reliable 24 VDC Discrete Acquisition

The YOKOGAWA SDV144-S13 is a compact S-series I/O module designed for discrete signal acquisition in industrial control systems. From my experience, it’s typically deployed where you need stable 24 VDC digital inputs from field devices—limit switches, proximity sensors, push buttons, interlocks—without adding complexity at the controller level. You might notice that it follows Yokogawa’s familiar plug-in form factor, so it fits neatly into existing S-series/FIO bases and ties into the backplane for power and communication. One thing I appreciate is how it handles the day-to-day realities on site: clear channel status indication, predictable behavior with dry contacts or transistor outputs (with the right terminal board), and the kind of long-life reliability plants expect from Yokogawa.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days coverage from delivery.
• Lead time: In-stock items typically ship within 1 week; not more than 1 month at the latest.
• Payment: 50% advance; full balance prior to delivery.
• Express options: FedEx, UPS, DHL.

Key Features

• 24 VDC discrete input module – Well-suited for standard industrial sensors and dry contact signals.
• Channel density that fits most cabinets – Commonly deployed as a 16-point DI card, balancing I/O count and wiring space.
• Backplane-powered – No separate field power feed to the card; simplifies panel wiring in many cases.
• Status LEDs per channel – Quick troubleshooting at the panel; technicians typically confirm input health at a glance.
• Compatible terminal boards – Pairs with Yokogawa terminal bases to accept dry contact or transistor (NPN/PNP) inputs depending on wiring.
• Robust isolation – Module-to-system isolation helps protect the controller from field disturbances.
• Stable in harsh environments – Appears to maintain performance across typical plant temperatures and vibration levels.
• Service-friendly – In many systems, supports online replacement with proper procedures, reducing downtime.

Technical Specifications

Related or Supporting Products

• YOKOGAWA SAV144 – Analog input module (current/voltage); often used alongside SDV modules to cover mixed I/O.
• YOKOGAWA SDO-series – Digital output modules for driving solenoids, relays, and lamps; complements SDV digital inputs.
• YOKOGAWA terminal boards (FIO/S-series) – Matching terminal bases for dry contact vs. transistor inputs; choose the type based on field wiring.
• YOKOGAWA node/interface units (e.g., ANB10D/ANB11D) – Provides the backplane and system communication for S-series I/O.
• Note: Model compatibility can vary by system architecture and style code (S13). We typically verify the exact base and terminal board part numbers before shipment.

Installation & Maintenance

• Cabinet & environment: Mount in a clean, dry control cabinet with adequate ventilation. Keep ambient within the stated operating range and avoid direct heat sources.
• Base & wiring: Install on the correct Yokogawa base/terminal board. Use proper ferrules, segregate I/O from power lines, and label each channel. For dry contacts, ensure proper wetting voltage from the terminal board.
• Grounding & noise: Maintain a solid cabinet ground. Route sensor cables away from high-power VFD lines; twisted-pair wiring helps reduce noise on long runs.
• Safety: De-energize the panel before landing wires. Observe ESD precautions when handling the card. Online replacement is possible in many systems but follow site procedures.
• Routine checks: Visually inspect terminal screws, look for LED anomalies, and confirm channel states in the DCS/PLC diagnostics. Firmware/configuration updates should be scheduled during planned downtime.
• Spares strategy: Keeping one spare per cabinet row is common practice, especially where uptime is critical.

Quality & Certifications

• Certifications: CE compliant; UL/CSA and RoHS conformity are typical for this series.
• Manufacturing: Produced under ISO 9001 quality systems.
• Warranty: 365-day warranty from delivery, with standard advance replacement support where applicable.

Quick field note from a maintenance lead we worked with: “Swapping an SDV144 during a shutdown took minutes. The channel LEDs and the existing terminal board wiring made verification straightforward.” That’s the kind of practical reliability teams usually look for when standardizing on Yokogawa I/O.