{"product_id":"yokogawa-snb10d-425-cu2t-prosafe-rs-sis-safety-node-units","title":"YOKOGAWA SNB10D-425\/CU2T ProSafe-RS SIS Safety Node Units","description":"\u003ch2\u003eYOKOGAWA SNB10D-425\/CU2T ProSafe-RS Safety Node Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYOKOGAWA SNB10D-425\/CU2T\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSNB10D\u003c\/strong\u003e Safety Node Unit, operates as a dedicated hardware component for field I\/O signal transmission and redundant safety execution within ProSafe-RS SIS and CENTUM VP 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\u003eSNB10D-425\/CU2T\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\u003e5.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e48.2 x 20.5 x 22.1 cm\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\u003e230 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e220 V AC to 240 V AC (dual-redundant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Bus\u003c\/td\u003e\n\u003ctd\u003eESB bus via CU2N connector unit (S9342FA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Integrity Level\u003c\/td\u003e\n\u003ctd\u003eSIL2\/SIL3 (IEC 61508)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHART Communication Loops and Fieldbus Connectivity\u003c\/h3\u003e\n\u003cp\u003eInternal ESB bus interfaces establish deterministic real-time communication between installed safety I\/O modules and the main safety control unit. Optocoupler arrays provide optical isolation across internal backplane lines, which protects logic processing circuits from field-side voltage transients. Integrated power distribution tracks feed regulated voltage to attached I\/O cards, while cold junction compensation circuits on compatible analog channels stabilize thermocouple sensor loops during ambient temperature shifts.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How do engineers configure the dual-redundant power supplies to maintain continuous safety node execution during a supply phase failure?\u003c\/p\u003e\n\u003cp\u003eA: Installers connect separate AC feed lines to the two independent power input terminals on the rear panel. Consequently, if one AC line loses power, the secondary power supply unit picks up the entire 230 VA load immediately, which prevents node reset cycles.\u003c\/p\u003e\n\u003cp\u003eQ: What procedure ensures proper cable shield grounding for the ESB bus connector unit (CU2N)?\u003c\/p\u003e\n\u003cp\u003eA: Technicians must clamp the braided shield of the ESB bus cable directly to the metal housing of the CU2N connector using the built-in grounding clip. In addition, operators must ground the entire 19-inch rack chassis to the plant protective earth grid to suppress electromagnetic noise.\u003c\/p\u003e\n\u003cp\u003eQ: How does the system handle an I\/O module replacement without interrupting active safety loop execution?\u003c\/p\u003e\n\u003cp\u003eA: The backplane architecture supports online module exchange. Once technicians unlatch the retaining mechanism, the internal logic isolates the target slot, whereupon the redundant controller retains active safety loop execution across parallel channels.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the unit horizontally into a standard 19-inch instrument rack, then secure the front panel using four M5 screws tightened to specified torque limits. Maintain a minimum vertical clearance of 50 mm above and below the rack chassis to permit unhindered airflow through the ventilation slots.\u003c\/p\u003e\n\u003cp\u003eRoute field signal cables and ESB bus communication cables through separate wire channels to prevent inductive noise coupling. Strip signal wire leads clean, clamp cable braid shields to the main cabinet ground bus bar, and verify that the protective earth (PE) terminal exhibits a low-resistance path to the facility grounding system before applying 220-240 V AC power.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43838355898458,"sku":"SNB10D-425","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/410_cd848c6b-9969-4c73-820f-3d0459a5f6cd.jpg?v=1786587391","url":"https:\/\/www.spareoil.com\/products\/yokogawa-snb10d-425-cu2t-prosafe-rs-sis-safety-node-units","provider":"SpareOil Automation","version":"1.0","type":"link"}