{"product_id":"yokogawa-ssc50d-s2521-prosafe-rs-duplexed-safety-control-unit","title":"Yokogawa SSC50D-S2521 ProSafe-RS Duplexed Safety Control Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa SSC50D-S2521\u003c\/strong\u003e is a rack-mountable \u003cstrong\u003eduplexed safety control unit\u003c\/strong\u003e engineered for the \u003cstrong\u003eProSafe-RS\u003c\/strong\u003e Safety Instrumented System (SIS). The \u003cstrong\u003eSSC50D-S2521\u003c\/strong\u003e operates as a Safety Control Station (SCS) CPU node over the dual-redundant \u003cstrong\u003eVnet\/IP\u003c\/strong\u003e control network to perform critical safety control, sequence-of-events recording (SOER), and subsystem integration functions. Certified by TÜV to meet Safety Integrity Level 3 (SIL 3) standards specified in IEC 61508, the \u003cstrong\u003eSSC50D-S2521\u003c\/strong\u003e delivers high-reliability execution for emergency shutdown, burner management, and safety interlock applications across process industries.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFully redundant, duplexed architecture designed for high availability in SIL 3 safety applications.\u003c\/li\u003e\n\u003cli\u003eIntegrates directly with the Vnet\/IP gigabit Ethernet-based dual-redundant control network.\u003c\/li\u003e\n\u003cli\u003eConnects to safety node units (I\/O nodes) via dual-redundant ESB bus interface connections.\u003c\/li\u003e\n\u003cli\u003eSupports inter-SCS safety communication over Vnet\/IP to form distributed safety loops.\u003c\/li\u003e\n\u003cli\u003eProvides Modbus master\/slave interface capabilities via serial or Ethernet communication modules.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEmergency Shutdown Systems (ESD)\u003c\/li\u003e\n\u003cli\u003eBurner Management Systems (BMS)\u003c\/li\u003e\n\u003cli\u003eFire and Gas Detection Systems (FGS)\u003c\/li\u003e\n\u003cli\u003eProcess Safety Management in chemical, petrochemical, and oil \u0026amp; gas facilities\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCategory\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\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProSafe-RS Safety Instrumented System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDuplexed Safety Control Unit (Standard Type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRack Mountable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety Integrity Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIL 3 (IEC 61508)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Network\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVnet\/IP (Dual-Redundant Gigabit Ethernet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Bus Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eESB Bus (Dual-Redundant, 128 Mbits\/sec)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 to 40 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 to 95% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Rate of Change\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWithin +-10 degC\/h (operating), Within +-20 degC\/h (storage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 to 120 V AC, 220 to 240 V AC, or 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 to 120 V AC (-15% to +10%), 220 to 240 V AC (-15% to +10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24 V DC (-10% to +20%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz +-3 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWithstanding Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1500 V AC for 1 min (AC models), 500 V AC for 1 min (24 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 M ohms at 500 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVibration Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eContinuous: 1.75 mm (5 to 9 Hz), 4.9 m\/s2 (9 to 150 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShock Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147 m\/s2, 11 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Altitude\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2000 m above sea level or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorrosive Gas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eANSI\/ISA S71.04 G3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Enclosure:\u003c\/strong\u003e For rack-mounted units to comply with safety and EMC standards, the unit must be housed in a lockable metal cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding Requirements:\u003c\/strong\u003e Provide independent grounding with a ground resistance of 100 ohms or less.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Wiring Protection:\u003c\/strong\u003e Dedicated breakers conforming to applicable safety standards (such as CSA C22.2 No.5, UL 489, EN 60947-1, or EN 60947-3) must be installed in the power distribution board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVnet Cable Setup:\u003c\/strong\u003e Install the specified clamp filter (A1193MN) to the Vnet communication cable as required for EMC compliance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESB Bus Distance Limits:\u003c\/strong\u003e Keep the standard dedicated ESB bus cable length within 10 meters from the CPU node ports.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctional Safety:\u003c\/strong\u003e Certified SIL 3 according to IEC 61508.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePLC Standard:\u003c\/strong\u003e Complies with IEC 61131-2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication Standards:\u003c\/strong\u003e EN 54, EN 298, EN 50156-1, IEC 61511-1, IEC 62061, NFPA72, NFPA85.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Standards:\u003c\/strong\u003e CAN\/CSA-C22.2 No.61010-1, EN 61010-1, EN 61010-2-030.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMC Standards:\u003c\/strong\u003e EN 55011 Class A Group 1, EN 61000-6-2, EN 61000-3-2, EN 61000-3-3, C-Tick Marking, KC Marking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHazardous Location Certifications:\u003c\/strong\u003e FM Non-Incendive (Class I Division 2 Groups A, B, C, D T4), Type \"n\" (II 3 G Ex nA IIC T4 Gc \/ II 3 G Ex nA nC IIC T4 Gc).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine Standards:\u003c\/strong\u003e ABS, BV, Lloyd's Register.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53647800664427,"sku":"SSC50D-S2521","price":77.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/SSC50D.jpg?v=1785632851","url":"https:\/\/www.plcprotech.com\/uz\/products\/yokogawa-ssc50d-s2521-prosafe-rs-duplexed-safety-control-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}