{"product_id":"abb-dsta-121-connection-unit-57120001-e","title":"ABB DSTA 121 Connection Unit 57120001-E","description":"\u003cp\u003eConfigured for field wiring interface termination and signal transmission routing in ABB automation platforms, the \u003cstrong\u003eABB DSTA 121 57120001-E\u003c\/strong\u003e (\u003cstrong\u003eDSTA 121\u003c\/strong\u003e Connection Units) provides direct physical\/electrical execution.\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\u003eDSTA 121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e57120001-E\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eConnection Units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e200 mm x 100 mm x 20 mm\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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive connection assembly (0 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eConnection Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHigh I\/O Density Scaling and Backplane Signal Integrity\u003c\/h3\u003e\n\u003cp\u003eThe connection unit facilitates physical wire termination to organize field-side conductors before routing to I\/O processing cards. Its internal bus traces preserve high backplane bus communication velocity and prevent signal distortion across high-density I\/O configurations. Passive galvanic paths optimize signal continuity and firmware flash compatibility during controller-level data processing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the DSTA 121 connection unit consume active backplane current?\u003c\/p\u003e\n\u003cp\u003eA: No, the module operates as a passive wiring termination unit and consumes zero active backplane electrical power.\u003c\/p\u003e\n\u003cp\u003eQ: How is shielding grounded when terminating field cables on the unit?\u003c\/p\u003e\n\u003cp\u003eA: Cable shield braid wires must be clamped directly to the chassis earthing bar adjacent to the terminal block to maintain noise suppression limits.\u003c\/p\u003e\n\u003cp\u003eQ: Can wiring be safely modified while field loops remain energized?\u003c\/p\u003e\n\u003cp\u003eA: No, primary field loops must be isolated and power removed before altering connections to prevent transient arc faults or signal disruption.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eIsolate all loop power supplies prior to making or modifying screw terminal connections.\u003c\/li\u003e\n\u003cli\u003eAlign and secure the 0.2 kg unit onto its designated mounting DIN rail or rack subrack frame.\u003c\/li\u003e\n\u003cli\u003eStrip field cable insulation back 7 mm and secure conductors into the screw terminals to ensure full electrical contact.\u003c\/li\u003e\n\u003cli\u003eClamp signal cable shields directly to the cabinet chassis grounding rail near the module entrance point.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum physical distance of 200 mm between low-voltage signal wiring on the DSTA 121 and 230 VAC\/480 VAC power lines.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53250187821365,"sku":"DSTA 121 57120001-E","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/DSTA12157120001-E.png?v=1785899831","url":"https:\/\/www.5gplc.com\/products\/abb-dsta-121-connection-unit-57120001-e","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}