{"product_id":"yokogawa-ncu4-a-communication-modules","title":"Yokogawa NCU4*A Communication Modules","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa NCU4*A\u003c\/strong\u003e serves as the primary \u003cstrong\u003eNCU4*A\u003c\/strong\u003e Network Communication Interface utilized to execute deterministic data transmission and device integration across Yokogawa DCS platforms. The unit interfaces field instrumentation—including sensors and actuators—directly to system controllers and higher-level network management nodes.\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\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eStandard DCS Interface Module Weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Yokogawa Slot Dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-25 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSystem Backplane Powered \/ External 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Input\/Output Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input\/Output Signal Ranges\u003c\/td\u003e\n\u003ctd\u003e+\/-10 V, +\/-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 Vrms (I\/O circuits to power supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-to-Channel Isolation \u0026amp; Cold Junction Compensation\u003c\/h3\u003e\n\u003cp\u003eThe NCU4*A incorporates hardware galvanic isolation rated at 1500 Vrms between the input\/output processing circuits and the internal power supply rail. This electrical barrier prevents high-voltage common-mode transients from corrupting multi-channel analog (+\/-10 V, +\/-20 mA) and digital (24 VDC) communication loops. The module maintains high signal integrity and deterministic update intervals across broad thermal variations ranging from -25 to +70 deg C in industrial rack installations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What isolation protection rating does the NCU4*A provide against field power transients?\u003c\/p\u003e\n\u003cp\u003eA: The module includes galvanic isolation rated at 1500 Vrms between the I\/O signal circuits and the main power supply bus to protect internal DCS electronics.\u003c\/p\u003e\n\u003cp\u003eQ: What analog and pulse signal ranges are natively supported by the NCU4*A interface?\u003c\/p\u003e\n\u003cp\u003eA: The hardware accommodates analog input and output ranges of +\/-10 V and +\/-20 mA, along with 24 VDC pulse and digital signal levels.\u003c\/p\u003e\n\u003cp\u003eQ: What is the maximum operating ambient temperature for field cabinet mounting?\u003c\/p\u003e\n\u003cp\u003eA: The NCU4*A is specified for operational ambient temperatures ranging from -25 to +70 deg C.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the NCU4*A securely into the designated communication slot of the Yokogawa DCS chassis, verifying that locking mechanisms are fully latched.\u003c\/li\u003e\n\u003cli\u003eEnsure external 24 VDC power lines and signal wiring are de-energized before connecting field wiring terminals.\u003c\/li\u003e\n\u003cli\u003eTerminate signal cable shielding to a dedicated, low-impedance field ground bus bar to optimize 1500 Vrms galvanic isolation performance.\u003c\/li\u003e\n\u003cli\u003eKeep analog signal cables (+\/-10 V, +\/-20 mA) physically segregated from high-voltage AC switching wires to limit electromagnetic noise coupling.\u003c\/li\u003e\n\u003cli\u003eProvide adequate cabinet ventilation clearance to stay within the module operating temperature envelope of -25 to +70 deg C.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52786770870552,"sku":"NCU4*A","price":170.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/PNL42_Cocoai_08d534af-f10a-4da0-ac56-d1f168c3cc6a.jpg?v=1790649538","url":"https:\/\/www.innoplcsync.com\/products\/yokogawa-ncu4-a-communication-modules","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}