YOKOGAWA SDV144-S13 Digital Input Module

The Yokogawa SDV144-S13 is a high-reliability Digital Input Module designed specifically for the ProSafe-RS Safety Instrumented System (SIS). 

Unlike standard DCS modules, the SDV series is engineered for safety-critical applications, providing the rigorous diagnostic capabilities required to meet functional safety standards.

1. Introduction

The SDV144-S13 is a 16-channel, isolated digital input module. Its primary function is to monitor the status of field switches (such as emergency stop buttons, pressure switches, or level switches). 

It is a core component of safety loops, often used to trigger an Emergency Shutdown (ESD) or to manage Fire and Gas (F&G) systems. 

The module performs constant self-diagnostics to ensure that a "fail-safe" state is maintained even in the event of an internal component failure.

2. Technical Parameter Table

3. Related Models

The SDV144-S13 is usually part of a safety node which includes:

SDV541: The corresponding Digital Output module for safety actions (e.g., closing a valve).

SST143 / SST543: Terminal boards specifically designed for ProSafe-RS I/O modules.

AKB331: Signal cables for connecting the module to the terminal block.

SSC60S / SSC50S: Safety Control Units (the "brains" that process the SDV144 signals).

4. Product Advantages and Features

Built-in Diagnostics: Detects field wiring issues such as short circuits and cable breaks, ensuring that a safety signal is never "stuck" due to external faults.

SIL3 Compliance: Certified for use in Safety Integrity Level 3 applications, providing the highest level of risk reduction for industrial processes.

High Availability: Supports hot-swapping and dual-redundancy. If one module fails, the safety system remains active via the partner module without a nuisance trip.

Galvanic Isolation: Protects the internal system logic from high-voltage surges or electrical noise originating in the field.

5. Application Cases

Emergency Shutdown (ESD): Monitoring critical pressure and temperature switches to shut down a refinery unit during an overpressure event.

Fire and Gas (F&G) Systems: Interfacing with smoke detectors and flame sensors to trigger localized suppression systems.

Burner Management Systems (BMS): Ensuring safe startup and shutdown sequences for large industrial boilers and furnaces.

Subsea Control: Monitoring the status of valves and actuators in offshore oil and gas production.

6. Other Models in the Same Series

Yokogawa offers several variations of the SDV144 to suit different environmental and technical needs:

SDV144-S53: The version with G3 conformal coating, designed for highly corrosive environments (high sulfur or salt spray).

SDV144-S33: A variant with different diagnostic timing or hardware revisions for specific older ProSafe-RS versions.

SDV144-S11: Standard version without certain advanced line monitoring features.