{"product_id":"siemens-building-technology-s55180-a157-control","title":"Siemens Building Technology S55180-A157 Control","description":"\u003cp\u003eThe \u003cstrong\u003eSiemens Building Technology S55180-A157\u003c\/strong\u003e is a heavy-duty SSE Series electronic actuator engineered for precise \u003cstrong\u003e0-10V modulation\u003c\/strong\u003e in commercial HVAC systems. This \u003cstrong\u003e24VAC non-spring return (NSR)\u003c\/strong\u003e unit is designed for \u003cstrong\u003enormally closed (NC)\u003c\/strong\u003e operation, making it a reliable solution for modulating airflow or hydronic flow when paired with compatible 599 Series zone valves. With a 1\/10-inch (2.5 mm) stroke and a fast 12.5-second positioning time, it provides the rapid response required for advanced \u003cstrong\u003ebuilding automation systems (BMS)\u003c\/strong\u003e and air handling unit (AHU) balancing.\u003c\/p\u003e\n\n\u003cp\u003eBuilt for the rigors of mechanical rooms, the \u003cstrong\u003eSiemens S55180-A157\u003c\/strong\u003e features a \u003cstrong\u003elinear actuation style\u003c\/strong\u003e and a low 3 VA power consumption profile. The NEMA 2 rated enclosure supports plenum installations, while the integrated LED visual position indicator allows for immediate diagnostic verification in the field. This model replaces the legacy SSA61U, offering technicians a direct-coupled installation process that requires no specialized tools for mounting. Its \u003cstrong\u003efail-in-place\u003c\/strong\u003e design ensures stable positioning during standard operations, maintaining system equilibrium across ventilation networks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits for Contractors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise 0-10 Vdc Signal:\u003c\/strong\u003e Ensures accurate \u003cstrong\u003eHVAC damper control\u003c\/strong\u003e and valve positioning for optimized thermal comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-Free Installation:\u003c\/strong\u003e Direct-coupled universal bonnet design allows for quick field mounting on Siemens 599 Series valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlenum Rated:\u003c\/strong\u003e UL listed for use in environmental air spaces, meeting strict commercial building codes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Override:\u003c\/strong\u003e Features a 3mm hex manual adjustment for commissioning or emergency positioning without power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS Integration:\u003c\/strong\u003e Seamlessly communicates with standard 24V control loops and \u003cstrong\u003eSiemens building technology\u003c\/strong\u003e platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this actuator compatible with other brands?\u003c\/strong\u003e\u003cbr\u003eWhile designed for Siemens 599 Series zone valves, it follows industry-standard \u003cstrong\u003e0-10V modulation\u003c\/strong\u003e protocols; however, check stroke compatibility (2.5mm) before attempting field retrofits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit return to start on power loss?\u003c\/strong\u003e\u003cbr\u003eNo, this is a \u003cstrong\u003enon-spring return (NSR)\u003c\/strong\u003e actuator that will fail-in-place or remain at its last position depending on the specific application setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I verify the current position?\u003c\/strong\u003e\u003cbr\u003eThe unit includes a built-in LED indicator that provides visual feedback on the current stem position and calibration status.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Siemens Building Technology","offers":[{"title":"Default Title","offer_id":43682888679602,"sku":"S55180-A157","price":153.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_8cdec161-bd10-45f6-bdaa-667264a3efd8.png?v=1775694554","url":"https:\/\/www.gsistore.com\/products\/siemens-building-technology-s55180-a157-control","provider":"GSIstore","version":"1.0","type":"link"}