{"product_id":"abb-dssr-122-48990001-nk-power-supply-units","title":"ABB DSSR 122 48990001-NK Power Supply Units","description":"\u003cp\u003eThe \u003cstrong\u003eABB DSSR 122 48990001-NK\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eDSSR 122\u003c\/strong\u003e Power Supply Unit, operates as a dedicated hardware component for DC voltage regulation and bus power conditioning within ABB automation systems. Designed for DC-input and regulated DC-output applications, the module converts an incoming 24 VDC supply into a regulated 5 VDC output delivering up to 40 A to power backplane logic circuits and connected processing assemblies.\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\u003eDSSR 122 48990001-NK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden \/ EU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e162 mm x 72 mm x 238.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Industrial Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e200 W output capacity (5 VDC, 40 A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC (regulated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e40 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Spare Fuse\u003c\/td\u003e\n\u003ctd\u003e20 A (Part number 5672827-20)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and Power Distribution\u003c\/h3\u003e\n\u003cp\u003eThe DSSR 122 power supply delivers clean 5 VDC logic power directly to system backplanes, ensuring stable backplane bus communication velocity across high-density digital and analog I\/O racks. Integrated active voltage regulation filters out input supply ripple and voltage transients on the primary 24 VDC bus, providing tight cross-channel noise decoupling. This continuous power stability prevents logic reset conditions and maintains deterministic frame timing across critical control system networks.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What size fuse is specified for protecting the input side of the DSSR 122?\u003c\/p\u003e\n\u003cp\u003eA: The module relies on a 20 A fuse (ABB part number 5672827-20) for internal overcurrent and short-circuit protection.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 5 VDC output voltage be adjusted manually on the front panel?\u003c\/p\u003e\n\u003cp\u003eA: The 5 VDC output is internally regulated to precise bus tolerances and does not require field adjustment during normal operation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Mounting and Thermal Orientation\u003c\/strong\u003e: Secure the DSSR 122 chassis inside the designated rack or enclosure using standard mounting hardware. Ensure vertical clearance above and below the module to allow unhindered natural convection cooling through thermal heat sink fins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Wiring and Fuse Installation\u003c\/strong\u003e: Connect input wires to the 24 VDC terminals using conductors sized appropriately for the load. Confirm that the recommended 20 A fuse (5672827-20) is seated firmly in the fuse holder before applying power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding and Shielding\u003c\/strong\u003e: Connect the frame ground terminal directly to the central panel earth busbar with a low-impedance ground braid to minimize high-frequency common-mode noise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance Handling\u003c\/strong\u003e: Before removing or installing the power supply module, verify that all incoming 24 VDC primary power feeders are completely de-energized.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53212637004085,"sku":"DSSR 122 48990001-NK","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/DSSR122.png?v=1784877563","url":"https:\/\/www.5gplc.com\/products\/abb-dssr-122-48990001-nk-power-supply-units","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}