{"product_id":"yokogawa-ps31-a-power-supply-module","title":"Yokogawa PS31*A Power Supply Module","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa PS31*A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003ePS31\u003c\/strong\u003e Power Supply Module, operates as a dedicated hardware component for primary AC\/DC power conversion and regulated 24 VDC bus power distribution within Yokogawa CENTUM DCS subrack assemblies. The module converts incoming AC line power into stabilized DC voltage rails that feed system backplane buses, controller modules, and field I\/O interfaces. Built-in overcurrent and overvoltage protective circuits isolate the backplane logic against power line disturbances and transient overloads.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCode Element\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification \/ Description\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePS31\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBase model designation for power supply module series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e*\u003cstrong\u003eA\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003eStyle code Revision A indicating specific circuit layout, heat sink profile, and internal protection revisions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003ePS31*A\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\u003e1.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e150 mm x 100 mm x 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eInternal dissipation \/ \u0026gt;85 % energy conversion efficiency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e100-240 VAC wide-range line input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003eRegulated 24 VDC backplane supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Protection\u003c\/td\u003e\n\u003ctd\u003eOvercurrent, overvoltage, short-circuit protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCategory\u003c\/td\u003e\n\u003ctd\u003ePower Supply Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePower Regulation and Field Loop Signal Isolation\u003c\/h3\u003e\n\u003cp\u003eThe PS31*A power supply module delivers stable DC power to system subracks while isolating field loop circuits from power line transients. Internal transformer isolation separates high-voltage AC inputs from system backplane buses, preserving signal fidelity across 4-20 mA HART loop protocol devices and FOUNDATION Fieldbus field instruments. By maintaining low ripple and noise on the 24 VDC output rails, the module supports the performance of downstream analog I\/O cards equipped with channel-to-channel isolation and precision cold junction compensation (CJC) processing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What happens when an output short circuit occurs on the PS31*A output rail?\u003c\/p\u003e\n\u003cp\u003eA: The module activates internal short-circuit protection circuitry, limiting output current or tripping output voltage to protect connected backplane logic until the fault is cleared.\u003c\/p\u003e\n\u003cp\u003eQ: Can the PS31*A power module be hot-swapped while the system is operating?\u003c\/p\u003e\n\u003cp\u003eA: Hot-swapping is permitted only in dual-redundant power configurations where the secondary parallel supply module is fully active and capable of carrying the entire backplane current load.\u003c\/p\u003e\n\u003cp\u003eQ: What grounding method is required to prevent electrical noise on the output rail?\u003c\/p\u003e\n\u003cp\u003eA: Ground the module chassis ground terminal directly to the main cabinet functional earth (FE) bus bar using a low-impedance copper conductor.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Slot Installation:\u003c\/strong\u003e Insert the PS31*A module into the designated power slot in the subrack along the guide rails. Push firmly until backplane connectors align and lock into place, then secure upper and lower panel screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Wiring Separation:\u003c\/strong\u003e Route AC input wiring in dedicated wiring ducts separated from low-voltage DC power lines and signal cabling to prevent electromagnetic coupling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding Provisions:\u003c\/strong\u003e Bond the module frame ground to the functional earth (FE) bus using a short grounding strap to optimize transient noise suppression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Constraints:\u003c\/strong\u003e Maintain clear convective airflow space above and below the power module rack slot to keep operating ambient temperatures within 0 to 60 deg C.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53281865367861,"sku":"PS31*A","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/PS31A.png?v=1786691529","url":"https:\/\/www.5gplc.com\/products\/yokogawa-ps31-a-power-supply-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}