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        SDV144-S33 S4

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        The YOKOGAWA SDV144-S33 S4 is a 16-channel safety digital input module engineered for Yokogawa’s ProSafe-RS safety instrumented systems to protect critical industrial processes.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for SDV144-S33 S4

        • Manufacturer:
          Yokogawa
        • Part Number:
          SDV144-S33 S4
        • Product Family:
          Centum CS-Centum VP
        • Product Type:
          Digital Input Module Safety I/O Terminal
        • Stock:
          3
        • Number of Channels:
          16-channel, module isolation
        • Input Signal Type:
          Dry Contact / Voltage-free contact inputs
        • Current Consumption (System):
          Max. 290 mA @ 5 V DC
        • Current Consumption (Field):
          Max. 140 mA @ 24 V DC
        • Conformal Coating Standard:
          ISA-S71.04 Class G3 (Corrosion-resistant)
        • Compatible Terminal Boards:
          SED4D, SRM53D, SRM54D (via AKB331 cable)
        • Allowable Field Capacitance:
          < 0.1 µF(with diagnostic pulse test active)
        • Allowable Field Resistance:
          ≤1kΩ (without line-monitoring adapter)
        • Safety Integrity Level:
          Certified up to SIL3 (IEC 61508 / IEC 61511)
        • Weight:
          0.2 kg
        • Estimated shipping dimensions:
          2.5x12.7x 12.7cm
        • Tariff Code:
          8537101190
        • Country of origin:
          Japan
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Applications Operating Environment Performance & Efficiency

        Features:

        • 16-Channel Module Isolated Configuration
        • ISA G3 Corrosive Gas Protection
        • Integrated Line Monitoring & Process Safety
        The YOKOGAWA SDV144-S33 S4 provides 16 dense dry-contact digital inputs combined into a single space-saving module layout. Its integrated module-level isolation safeguards internal system logic from field-side voltage spikes, grounding differentials, and external electromagnetic interference.

        Equipped with premium conformal coating, the YOKOGAWA SDV144-S33 S4 is engineered to survive in Class G3 harsh chemical environments. This industrial-grade coating prevents copper-whisker growth, corrosion, and silver migration on the PCB, heavily reducing long-term component degradation.

        The YOKOGAWA SDV144-S33 S4 employs a continuous background pulse-test routine to actively monitor input circuits. It provides engineers with immediate diagnostic visibility into stuck-at faults and wire breaks, removing the need for complex external monitoring hardware.

        The SDV144-S33 S4 YOKOGAWA Digital Input Module Safety I/O Terminal may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        YOKOGAWA SDV144-S33 S4 Digital Input Module Safety I/O Terminal Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        YOKOGAWA SDV144-S33 S4 Digital Input Module Safety I/O Terminal

        General

        • Manufacturer YOKOGAWA
        • Model SDV144-S33 S4
        • Condition New Original ready stock
        • Product Family SDV144-S13 S2,SDV144-S53 S4,SDV144-S63 S4
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Emergency Shutdown (ESD) Systems: Operates as the frontline digital input interface for critical process safety loops, safely monitoring field-level emergency pushbuttons and trip switches.
        • Burner Management Systems (BMS): Monitors critical flame sensors, fuel-gas valve limit switches, and air pressure monitors in utility boilers and industrial furnaces.
        • Fire and Gas (F&G) Architectures: Processes discrete alarm status inputs from flame detectors, toxic gas sensors, and manual pull stations across offshore platforms and refineries.
        • Critical Infrastructure Safety Interlocks: Manages complex interlocks for massive turbo-machinery, compressor stations, and high-pressure chemical reactors requiring strict SIL3 fail-safe architectures.
        • Aggressive Atmospheric Gas Shielding: Engineered to meet ISA-S71.04 Class G3 standards, providing continuous protection against corrosive compounds like Hydrogen Sulfide (H₂S), Sulfur Dioxide (SO₂), and Chlorine.
        • Broad Thermal Envelope: Supports stable operation across a wide industrial temperature spectrum, accommodating high-density cabinet installations where internal heat build-up can occur.
        • High-Humidity Resilience: Built to withstand environments with up to 95% relative humidity, preventing localized condensation short-circuits on critical internal components.
        • Severe Vibration and Shock Rating: Mechanical design complies with strict IEC industrial standards, ensuring structural integrity when mounted in cabinets adjacent to heavy vibrating machinery like pumps and turbines.
        • Sub-Millisecond Fault Capture: The high-speed internal scanning mechanism captures transient field contact changes rapidly, providing the safety logic solver with the real-time data needed to execute shutdown routines.
        • Low Power Consumption Footprint: Drawing only 290 mA at 5 V DC and 140 mA at 24 V DC, the module minimizes the thermal footprint within the I/O node, reducing the need for active cabinet cooling fans.
        • Highly Efficient Shared Diagnostics: Offloads complex loop diagnostic routines from the main controller to the local module processor, ensuring the ProSafe-RS system maintains rapid cycle times even under heavy I/O loads.
        • Uncompromised Availability: Supports hot-swapping when configured in a dual-redundant arrangement, allowing maintenance teams to replace a module without interrupting the running process or dropping the safety loop.
        Description
        The YOKOGAWA SDV144-S33 S4 is purpose-built to integrate seamlessly into the Yokogawa ProSafe-RS Safety Instrumented System (SIS), complying strictly with IEC 61508 and IEC 61511 standards up to SIL3 requirements. By accepting 16 dry contact signals, this module provides the essential interface for emergency shutdown (ESD), burner management systems (BMS), and fire and gas (F&G) architectures globally.

        To minimize dangerous undetected failures, the YOKOGAWA SDV144-S33 S4 utilizes specialized input pulse testing to continuously monitor field loop health. It actively detects open circuits, short circuits, and line faults in the field wiring without interrupting the production process, thereby maximizing plant uptime and ensuring predictable fail-safe behavior.

        Designated by its "S33" suffix, this version of the YOKOGAWA SDV144-S33 S4 features ISA G3-compliant conformal coating on its electronic assemblies. This provides robust protection against corrosive atmospheric gases, moisture, and particulate contamination, making it ideal for high-density control room installations in oil & gas, petrochemical, and chemical processing facilities.

        Built to the refined "Style S4" specification, the YOKOGAWA SDV144-S33 S4 features optimized module-level galvanic isolation and superior thermal management. With a strict current consumption profile of 290 mA at 5 V DC and 140 mA at 24 V DC, it ensures stable backplane load distribution and excellent electrical noise immunity across all 16 channels.
        Alternative Names
        SDV144S33S4 SDV144-S33 SDV144 SDVI44-S33 S4 SDV144-S13 S2 SDV144-S53 S4 SDV144-S63 S4
        Technical notes
        The YOKOGAWA SDV144-S33 S4 requires field loop parameters to stay within strict limits, dictating that total wiring capacitance must remain under 0.1 µF and external loop resistance must not exceed 1 kΩ when pulse testing is active. To maintain full SIL3 loop integrity and diagnostic depth, the YOKOGAWA SDV144-S33 S4 should be paired with compatible Yokogawa pressure clamp or MIL-cable terminal blocks as defined in the ProSafe-RS system architecture guidelines.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What terminal blocks and wiring interfaces are natively compatible with the YOKOGAWA SDV144-S33 S4?
        The YOKOGAWA SDV144-S33 S4 integrates seamlessly with standard Yokogawa pressure clamp terminal blocks, dedicated system cables, and MIL-connector interface cables. When deploying the module in a redundant configuration, it must be paired with the designated dual-redundant terminal board to ensure correct signal splitting without compromising diagnostic pulse testing.
        How does the YOKOGAWA SDV144-S33 S4 manage diagnostic pulse testing without triggering a false trip in the safety logic?
        The YOKOGAWA SDV144-S33 S4 generates a sub-millisecond diagnostic pulse down the signal line to check for shorts and open circuits. This pulse duration is engineered to be shorter than the input filter time constant of the module’s logic solver, ensuring comprehensive wiring diagnostics are gathered without inadvertently changing the process safety status.
        Can the YOKOGAWA SDV144-S33 S4 be mixed with older Style S2 modules in the same redundant I/O rack?
        Yes, the YOKOGAWA SDV144-S33 S4 maintains strict backward functional compatibility with legacy Style S2 configurations regarding footprint and core system I/O data mapping. However, in dual-redundant pairs, Yokogawa recommends pairing the YOKOGAWA SDV144-S33 S4 with an identical Style S4 module to guarantee perfectly balanced internal impedance and identical line test timing across the pair.
        What specific safety standards and certifications does the YOKOGAWA SDV144-S33 S4 carry for oil and gas applications?
        The YOKOGAWA SDV144-S33 S4 is TÜV certified for use in safety-critical applications up to Safety Integrity Level 3 (SIL3) in compliance with IEC 61508 and IEC 61511. Additionally, it carries ATEX/IECEx certifications for zone-rated hazardous environments and complies with FM/CSA standards for North American industrial deployments.
        What are the environmental operating limits for the YOKOGAWA SDV144-S33 S4 in high-density rack configurations?
        The YOKOGAWA SDV144-S33 S4 is designed for ambient operating temperatures ranging from -20°C up to 70°C depending on the mounting orientation and rack density. Thanks to its G3 conformal coating, it operates safely in environments with relative humidity up to 95% (non-condensing) and resists airborne chemical pollutants typical of petrochemical processing.

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