{"product_id":"digital-input-module-sdv531-s33-yokogawa-fio-series","title":"Digital Input Module | SDV531-S33 Yokogawa FIO Series","description":"\u003ch2\u003eYokogawa SDV531-S33 FIO Digital Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa SDV531-S33\u003c\/strong\u003e serves as the primary \u003cstrong\u003eYokogawa SDV531\u003c\/strong\u003e Digital Input Module utilized to execute discrete ON\/OFF signal acquisition across CENTUM VP\/CS distributed control systems platforms. Configured to monitor physical field components including limit switches, pushbuttons, and industrial safety interlocks, this hardware sub-assembly converts incoming 24 VDC voltage states into logic signals across the internal system bus.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSDV531-S33\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg (Shipping weight: 1.5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e130 x 119.9 x 32.8 mm (Packaged dimensions: 18.4 x 15 x 3 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e~550 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e32 digital inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC (Operational range: 20.4 to 26.4 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput ON Voltage\u003c\/td\u003e\n\u003ctd\u003e20 to 26.4 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput OFF Voltage\u003c\/td\u003e\n\u003ctd\u003eLower than or equal to 5.0 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e~2.5 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Allowable Voltage\u003c\/td\u003e\n\u003ctd\u003e30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003eLower than or equal to 3 ms typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e2 kV AC (Signal-to-system, 1 min); 500 V AC between commons (per 16 channels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctional Capability\u003c\/td\u003e\n\u003ctd\u003eON\/OFF status detection, edge counting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Connection\u003c\/td\u003e\n\u003ctd\u003eMIL connector cable (AKB337)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental Protection\u003c\/td\u003e\n\u003ctd\u003eISA Standard G3 conformal coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; DCS Instrumentation Features\u003c\/h3\u003e\n\u003cp\u003eThe input processing circuit layout implements independent channel-to-channel isolation architecture across the common return rails, separating the active discrete pathways into two isolated groups of 16 channels. Field signals pass through dedicated galvanic isolation circuits rated at 2 kV AC to insulate the core microprocessor architecture from external ground loops and electrical line surges. The hardware includes a factory-applied ISA Standard G3 conformal coating, which provides verified chemical resistance against airborne pollutants, moisture, and corrosive atmospheric gases. Additionally, the electronic board supports automated edge counting functions directly within the module hardware layer to alleviate high-speed pulse acquisition processing demands from the central DCS field control units.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the SDV531-S33 module handle direct hot-swapping during live node execution?\u003c\/p\u003e\n\u003cp\u003eA: Technicians can perform live removal and insertion of this module inside the standard FIO rack node. However, engineers must unpower or disconnect the external 32-channel MIL connector interface prior to module extraction to prevent field circuit faults or unintended system trips.\u003c\/p\u003e\n\u003cp\u003eQ: What are the compatibility limits when upgrading an end-of-life SDV531-S33 module?\u003c\/p\u003e\n\u003cp\u003eA: The SDV531-S33 module has reached its stop-production status, and the direct functional system replacement is the SDV531-S63 module. Engineers must verify backplane firmware flash compatibility and system configuration files prior to mounting the newer module model.\u003c\/p\u003e\n\u003cp\u003eQ: How do the electrical thresholds distinguish between valid ON and OFF logic states?\u003c\/p\u003e\n\u003cp\u003eA: The internal detection circuitry defines an active high ON state when the incoming potential measures between 20 VDC and 26.4 VDC, pulling approximately 2.5 mA. Any field potential dropping below 5.0 VDC forces the channel registration into a definitive logic OFF state.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module vertically into the designated slot of the FIO rack assembly, verifying that the integrated structural grounding tabs snap firmly against the low-impedance DIN rail base.\u003c\/li\u003e\n\u003cli\u003eFix the external MIL connector cable (AKB337) into the module front socket, and engage both mechanical retaining clips fully to prevent thermal expansion or vibration from loosening the electrical contacts.\u003c\/li\u003e\n\u003cli\u003eKeep all discrete input signal loops isolated from inductive electrical conductors, maintaining a physical routing separation barrier of at least 100 mm from high-voltage AC motor lines.\u003c\/li\u003e\n\u003cli\u003eConnect the shield drain wires of the field cables to the local cabinet earth ground plate only, keeping the field element side ungrounded to eliminate potential parasitic earth loops.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43778061762650,"sku":"SDV531-S33","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/705..jpg?v=1785723409","url":"https:\/\/www.spareoil.com\/es\/products\/digital-input-module-sdv531-s33-yokogawa-fio-series","provider":"SpareOil Automation","version":"1.0","type":"link"}