{"product_id":"yokogawa-ncu4-a-node-control-unit-original","title":"YOKOGAWA NCU4*A Node Control Unit Original","description":"\u003ch2\u003eYOKOGAWA NCU4*A Node Control Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYOKOGAWA NCU4*A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eNCU4*A\u003c\/strong\u003e Node Control Unit, operates as a dedicated hardware component for communication gateway execution and local process control within CENTUM VP and ProSafe-RS platform networks.\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\u003eNCU4*A\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\u003eSingapore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e130 mm x 100 mm x 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to 60 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\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003eHigh-speed system bus interface with embedded CPU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and DCS Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe NCU4*A functions as the primary node interface between distributed I\/O modules and the system controller, utilizing 4-20 mA HART loop protocol standards for precise data interchange. The hardware architecture supports dual-redundant communication and control paths, facilitating high-availability configurations required for safety-critical operations. To maintain signal integrity during high-volume data traffic, the module provides channel-to-channel isolation, effectively mitigating electrical noise coupling into the system bus. Additionally, the unit enables cold junction compensation (CJC) for integrated thermocouple measurements, ensuring high-precision data acquisition during temperature-sensitive process monitoring.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the NCU4*A support hot-swapping within the I\/O rack during system operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the module supports hot-swapping; however, verify that the corresponding redundant node is fully synchronized and active before extraction to maintain seamless process control and prevent network communication gaps.\u003c\/p\u003e\n\u003cp\u003eQ: How does the internal watchdog timer respond to process faults?\u003c\/p\u003e\n\u003cp\u003eA: The embedded watchdog timer monitors the cycle execution of the CPU; if the scan time exceeds defined parameters due to a logic hang or hardware fault, the module triggers a fault log entry and initiates a safe-state transition for the associated I\/O points.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the NCU4*A securely into the designated control rack slot, ensuring the backplane pins are fully seated and the mechanical locking mechanism is engaged. Terminate all system bus and Ethernet cabling to the appropriate ports, ensuring that cable shields are properly bonded to the cabinet ground bus at the entry point to mitigate electromagnetic interference. Verify that the 24 VDC input voltage is stable and within nominal limits before powering the module. After installation, utilize the engineering software to confirm the node link status and verify synchronization of redundant paths before commissioning the unit into the active process control loop.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43655244578906,"sku":"NCU4*A","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/527._9687d98f-2420-4e4b-910a-946d6740e386.jpg?v=1783992376","url":"https:\/\/www.spareoil.com\/ar\/products\/yokogawa-ncu4-a-node-control-unit-original","provider":"SpareOil Automation","version":"1.0","type":"link"}