{"product_id":"ssc50d-f2521-yokogawa-prosafe-rs-duplexed-safety-control-unit","title":"SSC50D-F2521 Yokogawa ProSafe-RS Duplexed Safety Control Unit","description":"\u003ch2\u003eYokogawa SSC50D Safety Control Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa SSC50D-F2521\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSSC50D\u003c\/strong\u003e Duplexed Safety Control Unit, operates as a dedicated hardware component for executing SIL3 safety logic and managing dual-redundant communication within ProSafe-RS Safety Instrumented System (SIS) platforms.\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\u003eSSC50D-F2521\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa Electric Corporation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e13 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 19-inch rack mount chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e240 VA (100-120 V AC), 290 VA (200-240 V AC), 7.0 A (24 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003eMIPS R5000 Processor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003eDual-redundant CPU, dual power supplies, dual Vnet\/IP ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Protection\u003c\/td\u003e\n\u003ctd\u003eNVRAM with battery backup (3-year cycle at \u0026lt;= 30 deg C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Network\u003c\/td\u003e\n\u003ctd\u003eDual-redundant Vnet\/IP (100 Mbps full duplex)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Rating\u003c\/td\u003e\n\u003ctd\u003eCertified up to SIL3 (IEC 61508 compliant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 9 Safety Node Units and 78 I\/O modules per SCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol \u0026amp; Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe SSC50D-F2521 safety controller coordinates deterministic data exchange between central logic solvers and field I\/O racks across dual-redundant Vnet\/IP networks. The controller processes process inputs from 4-20 mA HART loop protocol instruments through local and remote I\/O nodes. Galvanic channel-to-channel isolation on the backplane interfaces prevents external electrical faults from propagating across redundant CPU modules, ensuring continuous emergency shutdown (ESD) and burner management system (BMS) operations without spurious trip occurrences.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the duplex CPU architecture handle module fault switching on the SSC50D-F2521?\u003c\/p\u003e\n\u003cp\u003eA: The dual MIPS R5000 processors execute safety logic in lockstep. If a hardware fault occurs on the active CPU card, internal diagnostic circuits initiate a bumpless transfer to the standby processor within a single control scan cycle, avoiding logic disruption.\u003c\/p\u003e\n\u003cp\u003eQ: What mounting precautions must be taken when operating the SSC50D-F2521 above 40 deg C?\u003c\/p\u003e\n\u003cp\u003eA: Forced fan cooling assemblies must be installed directly adjacent to the rack unit when operating in environments between +40 deg C and +70 deg C to maintain thermal equilibrium and protect non-volatile memory components.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the SSC50D-F2521 unit into a standard 19-inch instrument cabinet, fixing the chassis using four M5 retention screws and applying correct torque to ensure structural grounding. Terminate both primary and secondary Vnet\/IP lines with Category 5e or higher shielded twisted-pair cables, ensuring separate cable raceway paths to prevent simultaneous physical media damage. Ground all cable shields directly to the cabinet main earth bar using low-impedance grounding clamps. Ensure adequate clearance at the top and bottom air vents to maintain unobstructed cooling airflow.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43895512957018,"sku":"SSC50D-F2521","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/654._c7909811-9b80-4f5e-aa69-2a70d76c6a3b.jpg?v=1787537760","url":"https:\/\/www.spareoil.com\/products\/ssc50d-f2521-yokogawa-prosafe-rs-duplexed-safety-control-unit","provider":"SpareOil Automation","version":"1.0","type":"link"}