{"product_id":"allen-bradley-sdn2-5-20red-redundancy-module","title":"Allen-Bradley SDN2.5-20RED Redundancy Module","description":"\u003ch2\u003eAllen-Bradley SDN2.5-20RED Redundancy Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for redundant 24 VDC power distribution, the \u003cstrong\u003eAllen-Bradley SDN2.5-20RED\u003c\/strong\u003e (\u003cstrong\u003eSDN2.5-20RED\u003c\/strong\u003e Redundancy Module) decouples parallel power supply outputs for N+1 operation. The module provides a 20 A maximum current handling capacity, 0.6 VDC typical voltage drop, inverse battery protection, and DC OK monitoring. The documented catalog data identifies the unit as a SolaHD SDN Redundant Series component.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eSDN2.5-20RED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ SolaHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSDN Redundant Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMalaysia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRedundancy Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Rated Voltage\u003c\/td\u003e\n\u003ctd\u003e35 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current Handling\u003c\/td\u003e\n\u003ctd\u003e20 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Voltage Drop\u003c\/td\u003e\n\u003ctd\u003e0.6 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Configuration\u003c\/td\u003e\n\u003ctd\u003eN+1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverse Battery Protection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003eCaptive screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor Size\u003c\/td\u003e\n\u003ctd\u003e16-10 AWG solid, 1.5-6 mm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e124 mm H x 50 mm W x 116 mm D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e625 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 to +60 deg C at full nominal load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-25 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDegree of Protection\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eTS35\/7.5 or TS35\/15 DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC OK Contact\u003c\/td\u003e\n\u003ctd\u003e1 output contact, N.O. and N.C.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC OK Voltage Set Point\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;18 VDC +\/-5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC OK Contact Rating\u003c\/td\u003e\n\u003ctd\u003e30 VDC @ 2 A \/ 250 VAC @ 2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eThe module electrically decouples multiple identical SDN power supplies and supports N+1 redundant configurations. Its external redundancy path prevents a failed supply from overloading the remaining supply units.\u003c\/p\u003e\n\u003ch3\u003eDIN-Rail Power Redundancy and Isolation\u003c\/h3\u003e\n\u003cp\u003eThe SDN2.5-20RED accepts 24 VDC supply inputs and provides a common redundant output path with a documented maximum current handling capacity of 20 A.\u003c\/p\u003e\n\u003cp\u003eThe typical input-to-output voltage drop is 0.6 VDC. Therefore, downstream equipment should be evaluated against the available DC voltage after the redundancy-module drop.\u003c\/p\u003e\n\u003cp\u003eWhen used with compatible SDN power supplies, the power-supply front switches must be configured for parallel operation rather than single operation. The module incorporates DC OK relay contacts for output monitoring.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum current handling capacity of the SDN2.5-20RED?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The specified maximum current handling capacity is 20 A.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What voltage drop occurs across the redundancy module?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The documented typical voltage drop from input to output is 0.6 VDC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the module provide output-status monitoring?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The SDN2.5-20RED provides a DC OK output contact with N.O. and N.C. contacts. The documented set point is greater than 18 VDC +\/-5%.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the unit by snapping it onto a compatible TS35\/7.5 or TS35\/15 DIN rail. Verify that the locking mechanism is fully engaged before wiring.\u003c\/p\u003e\n\u003cp\u003eConnect compatible SDN power supplies to the designated redundancy inputs and maintain correct DC polarity throughout the circuit.\u003c\/p\u003e\n\u003cp\u003eThe supplied documentation specifies captive screw terminals and 16-10 AWG solid conductors, corresponding to 1.5-6 mm2.\u003c\/p\u003e\n\u003cp\u003eConnect the GND terminal when using the voltage-monitoring function. The manufacturer documentation states that GND must be connected for voltage monitoring to operate correctly.\u003c\/p\u003e\n\u003cp\u003eKeep DC power wiring separated from high-voltage switching, contactor, and motor conductors where practical. Route monitoring contacts separately from high-current conductors to reduce electrical interference.\u003c\/p\u003e\n\u003cp\u003eThe enclosure is rated IP20 and should therefore be protected from moisture and condensation during installation. \u003c\/p\u003e","brand":"AMPHENOL","offers":[{"title":"Default Title","offer_id":43969138098266,"sku":"SDN2.5-20RED","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/SDN2.5-20RED.jpg?v=1788161183","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-sdn2-5-20red-redundancy-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}