{"product_id":"snb10d-225-cu2n-yokogawa-safety-node-unit-dual-power-esb-bus","title":"SNB10D-225\/CU2N Yokogawa Safety Node Unit | Dual Power ESB Bus","description":"\u003ch3\u003e\u003cb\u003eYokogawa SNB10D-225\/CU2N Safety Node Unit\u003c\/b\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cb\u003e01 | System Overview: Safety Control and Node Expansion\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eYokogawa SNB10D-225\/CU2N\u003c\/b\u003e is a rack-mountable safety node unit for Yokogawa safety control systems. It supports distributed safety system expansion through the ESB bus. This configuration combines dual-redundant power supplies, an R3 node expansion software license, and an ESB bus connector unit. It uses a 220–240 V AC supply and supports ISA Standard G3 environmental conditions. The unit connects to compatible safety control units through an approved ESB bus coupler. Engineers can expand safety I\/O capacity while maintaining a structured rack installation.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e02 | Configuration Breakdown: Decode the Ordering Code\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCode segment\u003c\/th\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003eEngineering significance\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSNB10D\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSafety Node Unit\u003c\/td\u003e\n\u003ctd\u003eIdentifies the equipment family and node function.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003e-2\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eDual-redundant power supply with R3 node expansion software license\u003c\/td\u003e\n\u003ctd\u003eProvides redundant power architecture and the specified expansion license.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003e2\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e220–240 V AC power supply\u003c\/td\u003e\n\u003ctd\u003eDefines the required AC supply class.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003e5\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eISA Standard G3; −20 to 70°C; no explosion protection\u003c\/td\u003e\n\u003ctd\u003eDefines the specified environmental option.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCU2N\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eESB Bus Connector Unit\u003c\/td\u003e\n\u003ctd\u003eIdentifies connector unit S9342FA.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e**Complete configuration:** \u003cb\u003eSNB10D-225\/CU2N\u003c\/b\u003e - Rack-mountable safety node unit. - Dual-redundant power supply. - R3 node expansion software license. - 220–240 V AC, 50\/60 Hz. - ISA Standard G3 environmental option. - Operating temperature specification: −20 to 70°C. - ESB bus connector unit S9342FA. - No explosion protection.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e03 | Technical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eSNB10D-225\/CU2N\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eSafety Node Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRack mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply configuration\u003c\/td\u003e\n\u003ctd\u003eDual-redundant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated supply voltage\u003c\/td\u003e\n\u003ctd\u003e220–240 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply frequency\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e230 VA for the 220–240 V AC specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion software\u003c\/td\u003e\n\u003ctd\u003eR3 node expansion license\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus interface\u003c\/td\u003e\n\u003ctd\u003eESB bus connector unit S9342FA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental option\u003c\/td\u003e\n\u003ctd\u003eISA Standard G3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecified temperature range\u003c\/td\u003e\n\u003ctd\u003e−20 to 70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExplosion protection\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e205 × 482 × 221 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate weight\u003c\/td\u003e\n\u003ctd\u003e5.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRack fastening\u003c\/td\u003e\n\u003ctd\u003eFour M5 screws with insulation bushes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003e04 | ESB Expansion Capacity and System Architecture\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eSNB10D\u003c\/b\u003e connects safety node units to compatible safety control units through an ESB bus coupler. The supported node count depends on the coupler and controller configuration.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eESB bus coupler\u003c\/th\u003e\n\u003cth\u003eSupported safety control units\u003c\/th\u003e\n\u003cth\u003eMaximum connected safety node units\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSEC402\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eS2SC70S, S2SC70D, SSC60S, SSC60D\u003c\/td\u003e\n\u003ctd\u003eUp to 13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSEC401\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSafety control unit using SEC401\u003c\/td\u003e\n\u003ctd\u003eUp to 9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures describe the supplied system limits. Confirm the applicable controller, bus coupler, software, and system configuration before adding nodes. The R3 expansion license supports the specified node expansion function. It does not automatically authorize every controller combination or maximum node arrangement.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e05 | Power Architecture and Rack Installation\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe selected configuration uses a \u003cb\u003e220–240 V AC supply\u003c\/b\u003e. Its specified power consumption is 230 VA. The dual-redundant supply configuration supports power redundancy. Verify the actual power distribution arrangement and redundancy requirements in the system design. **Rack installation sequence**\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eConfirm the rack supports the unit's dimensions and mounting arrangement.\u003c\/li\u003e\n\u003cli\u003eCheck available rack space and access for the ESB bus connection.\u003c\/li\u003e\n\u003cli\u003eVerify the supply voltage and frequency against the nameplate.\u003c\/li\u003e\n\u003cli\u003eInstall the unit using four M5 mounting screws.\u003c\/li\u003e\n\u003cli\u003eUse the specified insulation bushes during mounting.\u003c\/li\u003e\n\u003cli\u003eConnect the approved ESB bus interface and power wiring.\u003c\/li\u003e\n\u003cli\u003eInspect the installation before applying power.\u003c\/li\u003e\n\u003cli\u003eFollow Yokogawa commissioning procedures to verify node communication.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe supplied information does not specify connector torque, rack clearance, or detailed wiring limits. Refer to the applicable installation manual.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e06 | Suitable Equipment and Industrial Applications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eSNB10D-225\/CU2N\u003c\/b\u003e is intended for compatible Yokogawa safety control installations. Its primary role involves safety system node integration and expansion.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSafety instrumented systems:\u003c\/b\u003e Connect supported safety nodes to compatible safety controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProcess plant protection:\u003c\/b\u003e Support safety control architectures in chemical and petrochemical facilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePower generation:\u003c\/b\u003e Integrate compatible safety nodes into engineered plant protection systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOil and gas facilities:\u003c\/b\u003e Support distributed safety system configurations in approved control cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIndustrial expansion projects:\u003c\/b\u003e Add supported nodes when the controller and ESB architecture permit expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eControl system modernization:\u003c\/b\u003e Replace a matching node unit after verifying hardware, licensing, and interface compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe unit is not a standalone safety controller. Its suitability depends on the complete safety system architecture and certified application design.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e07 | Diagnostics and Field Verification\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe supplied specifications do not identify specific onboard diagnostic LEDs, fault codes, or individual diagnostic functions. Engineers should use the applicable Yokogawa safety system diagnostic tools. During commissioning or troubleshooting, inspect the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eNode communication:\u003c\/b\u003e Confirm that the safety control unit recognizes the connected node.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eESB bus connection:\u003c\/b\u003e Inspect connector seating, cable identification, and bus coupler compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePower status:\u003c\/b\u003e Verify the AC supply and investigate power-related alarms through approved system diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRedundancy status:\u003c\/b\u003e Confirm that the configured redundant power arrangement operates as designed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExpansion configuration:\u003c\/b\u003e Check the node count, license status, and controller configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTemperature conditions:\u003c\/b\u003e Confirm that the installed environment remains within the specified range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e**Field example:** A newly installed safety node fails to appear in the controller configuration. First, verify the ESB connector and coupler model. Then check the expansion license and approved node count. Avoid replacing the node before checking these system-level dependencies.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e08 | Compatibility, Environmental Limits, and Safety\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, verify the complete system configuration.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the safety control unit model.\u003c\/li\u003e\n\u003cli\u003eConfirm SEC401 or SEC402 bus coupler compatibility.\u003c\/li\u003e\n\u003cli\u003eCheck the supported number of connected nodes.\u003c\/li\u003e\n\u003cli\u003eVerify the R3 expansion license requirement.\u003c\/li\u003e\n\u003cli\u003eConfirm ESB connector unit S9342FA and associated wiring.\u003c\/li\u003e\n\u003cli\u003eCheck the 220–240 V AC supply and 50\/60 Hz frequency.\u003c\/li\u003e\n\u003cli\u003eVerify rack dimensions and mounting provisions.\u003c\/li\u003e\n\u003cli\u003eConfirm the site temperature and environmental classification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe specified environmental option supports ISA Standard G3 and −20 to 70°C. The configuration does not include explosion protection. The supplied specifications do not identify a specific SIL certificate or safety integrity rating for this unit. Confirm applicable certification and system safety requirements through official documentation.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e09 | Global PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eWhen selecting a safety node unit, engineers should evaluate its role within the complete ESB architecture. The controller, coupler, expansion license, and node count determine practical compatibility. For example, a plant may plan to expand an existing safety system with additional nodes. The engineering team should identify its safety controller and ESB coupler first. A SEC402 configuration supports up to 13 safety node units for the listed controller models. A SEC401 configuration supports up to 9. The team should also verify rack space and supply arrangements. Dual-redundant power does not remove the need for correct power distribution and system commissioning.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e10 | Packaging, Warranty, and Shipping\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct:\u003c\/b\u003e Yokogawa SNB10D-225\/CU2N Safety Node Unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePackaging:\u003c\/b\u003e Protective packaging for industrial control equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAccessories:\u003c\/b\u003e Confirm included mounting hardware and connector accessories with the supplier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty:\u003c\/b\u003e 12-month warranty, subject to applicable sales terms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShipping options:\u003c\/b\u003e FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDispatch target:\u003c\/b\u003e 24–48 hours after order confirmation and stock verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003e11 | Frequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cb\u003eDoes the SNB10D-225\/CU2N include the ESB bus connector unit?\u003c\/b\u003e The CU2N option identifies connector unit S9342FA. Confirm the supplied package contents and any separate cabling requirements before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e2. Can this model operate from a 24 V DC supply?\u003c\/b\u003e This specific configuration specifies 220–240 V AC. Other SNB10D supply options may exist, but they require different suffix codes. Do not apply 24 V DC to this AC-rated configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e3. How do I determine whether my safety system can support another node?\u003c\/b\u003e Identify the controller and bus coupler first. Then check the supported node limit, installed expansion license, and system configuration. The stated maximum alone does not confirm available capacity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e4. What should I investigate if a node loses communication after installation?\u003c\/b\u003e Check the ESB bus connection, coupler compatibility, power status, node configuration, and expansion license. Use the system's diagnostic tools to identify the fault before replacing hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e5. What information helps confirm the correct replacement unit?\u003c\/b\u003e Provide the existing unit's full model code, controller model, ESB coupler, supply voltage, and rack configuration. These details help verify the hardware and expansion options before purchase.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/SNB10D-225.png?v=1792563356\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":67706565132470,"sku":"SNB10D-225\/CU2N","price":136.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/SNB10D-225-CU2N-1_45bbe48f-1510-45d8-ae21-96de07d66fa5.jpg?v=1792563613","url":"https:\/\/www.plcsparehub.com\/products\/snb10d-225-cu2n-yokogawa-safety-node-unit-dual-power-esb-bus","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}