{"product_id":"duplexed-safety-control-unit-yokogawa-ssc50d-s2121-s1","title":"Duplexed Safety Control Unit YOKOGAWA SSC50D-S2121 S1","description":"\u003cp\u003eConfigured for high-reliability safety instrumentation in ProSafe-RS systems, the \u003cstrong\u003eYOKOGAWA SSC50D-S2121 S1\u003c\/strong\u003e (\u003cstrong\u003eSSC50D\u003c\/strong\u003e Safety Control Unit) provides direct physical execution of SIL3-rated logic and process monitoring.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe SSC50D-S2121 S1 follows a specific revision and hardware configuration matrix. The -S2121 designator signifies the specific duplexed processor configuration optimized for fault-tolerant operation, while the S1 suffix denotes the baseline hardware iteration compliant with safety-critical control standards.\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-S2121 S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYOKOGAWA\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\u003e1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e10.3 cm x 5.1 cm x 5.4 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDuplexed Safety Control Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Integrity\u003c\/td\u003e\n\u003ctd\u003eSIL3 rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eTriple Modular Redundancy and Fail-Safe State Execution\u003c\/h3\u003e\n\u003cp\u003eThe SSC50D-S2121 S1 is architected to support triple modular redundancy (TMR) 2oo3 (two-out-of-three) voting logic within the ProSafe-RS platform. This architecture ensures that the safety control unit can detect and isolate internal faults without interrupting the process safety function. In the event of a critical system failure or detected anomaly, the module initiates a fail-safe state execution, driving all safety outputs to a predetermined secure condition. This mechanism is required to maintain operational stability and minimize the risk of process hazards in safety-instrumented systems (SIS).\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the SSC50D-S2121 S1 be used in a simplex configuration?\u003c\/p\u003e\n\u003cp\u003eA: The SSC50D-S2121 is specifically designed for duplexed\/redundant operation. Utilizing it outside of its intended safety-redundant configuration may violate the SIL3 certification requirements for the safety instrumented system.\u003c\/p\u003e\n\u003cp\u003eQ: How does the unit handle diagnostics in a redundant pair?\u003c\/p\u003e\n\u003cp\u003eA: The units communicate via a dedicated high-speed link to synchronize safety data and perform cross-channel diagnostic comparisons. Discrepancies between the two units trigger a fault alarm, allowing for safe maintenance without causing a spurious process trip.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMounting: Install in the designated ProSafe-RS control rack. Ensure the locking mechanisms are fully engaged to provide secure mechanical and electrical connectivity to the redundant backplane.\u003c\/li\u003e\n\u003cli\u003eGrounding: Connect the chassis to the system ground bus to ensure effective shielding against electromagnetic interference. Grounding is necessary to maintain the integrity of the diagnostic signals.\u003c\/li\u003e\n\u003cli\u003ePower Redundancy: Ensure that both power input channels are connected to independent power sources to maintain the availability of the duplexed control unit during a primary supply failure.\u003c\/li\u003e\n\u003cli\u003eEnvironment: Install within a climate-controlled cabinet. Operating temperatures must be maintained between 0 deg C and 50 deg C to prevent the degradation of internal logic components and ensuring reliable safety function execution.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":49235828244732,"sku":"SSC50D-S2121 S1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/SSC50D-F25241.jpg?v=1781143677","url":"https:\/\/www.electronicplc.com\/ar\/products\/duplexed-safety-control-unit-yokogawa-ssc50d-s2121-s1","provider":"Electronic PLC","version":"1.0","type":"link"}