{"product_id":"cj1w-ad04u-omron-isolated-type-universal-input-unit-cj-series","title":"CJ1W-AD04U Omron Isolated-type Universal Input Unit CJ Series","description":"\u003cp\u003eConfigured for multi-channel analog signal acquisition and digitized temperature scaling in CJ Series backplanes, the \u003cstrong\u003eOmron CJ1W-AD04U\u003c\/strong\u003e (\u003cstrong\u003eCJ1W-AD04U\u003c\/strong\u003e Isolated-type Universal Input Unit) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eArchitectural Designation and Input Configuration\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eOmron CJ1W-AD04U\u003c\/strong\u003e functions as a Special I\/O Unit mapped directly into the internal address table of Omron CJ-series CPU systems:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCJ1W\u003c\/strong\u003e: Dedicated module platform housing for CJ1G, CJ1M, CJ2M, and CJ2H programmable controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAD\u003c\/strong\u003e: Analog-to-digital processing module architecture converting field input signals to 16-bit process registers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e04U\u003c\/strong\u003e: Designator specifying 4 channel inputs with universal signal processing (RTD, Thermocouple, Voltage, Current).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Number Allocation\u003c\/strong\u003e: Consumes exactly 1 Special I\/O Unit address assigned via front rotary selector switches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePhysical and Electrical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003eCJ1W-AD04U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOmron\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\u003eInput Points\u003c\/td\u003e\n\u003ctd\u003e4 points (individually configured per channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Types\u003c\/td\u003e\n\u003ctd\u003eUniversal: Pt100, JPt100, Pt1000, K, J, T, L, R, S, B, 4 to 20 mA, 0 to 20 mA, 1 to 5 V, 0 to 5 V, 0 to 10 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Speed\u003c\/td\u003e\n\u003ctd\u003e250 ms for 4 input channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy (RTD Input)\u003c\/td\u003e\n\u003ctd\u003e(+-0.3% of PV or +-0.8 deg C, whichever is larger) +-1 digit max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy (Thermocouple Input)\u003c\/td\u003e\n\u003ctd\u003e(+-0.3% of PV or +-1.5 deg C, whichever is larger) +-1 digit max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy (Voltage\/Current Input)\u003c\/td\u003e\n\u003ctd\u003e+-0.3% of F.S. +-1 digit max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.32 A at 5 VDC (1.6 W max. via internal backplane bus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Connection\u003c\/td\u003e\n\u003ctd\u003eRemovable screw terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit Weight\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e2.0 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e160 mm x 120 mm x 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Synchronization \u0026amp; Firmware Flash Execution\u003c\/h3\u003e\n\u003cp\u003eThe module transfers digitized process variables across the local CJ backplane bus into dedicated CPU memory words every scan cycle. Internal backplane bus communication velocity handles fast register transfers without introducing firmware execution jitter. Dynamic scaling registers and onboard firmware flash compatibility maintain signal calibration parameters across power cycles without requiring external setup software reload routines.\u003c\/p\u003e\n\u003ch3\u003eShipping Package Content\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Omron CJ1W-AD04U Isolated-type Universal Input Unit\u003c\/li\u003e\n\u003cli\u003e1 x Removable front terminal block connector\u003c\/li\u003e\n\u003cli\u003e1 x Hardware wiring and mounting instruction document\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation \u0026amp; Wiring Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Power Cutoff\u003c\/strong\u003e: Switch off the main rack power supply prior to sliding the module into or out of the CJ-series CPU or expansion rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielded Cabling\u003c\/strong\u003e: Route thermocouple, RTD, and 4-20 mA current signals using twisted-pair shielded cabling. Connect the shield drain wire to earth ground at the panel side only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Screws Verification\u003c\/strong\u003e: Tighten terminal block connection screws to a torque rating of 0.5 N m to ensure stable electrical continuity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Loop Resistors\u003c\/strong\u003e: Ensure correct wiring configurations when selecting current inputs to engage internal precision shunt loops without overloading inputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCan each of the 4 input channels be set to a different signal range on the CJ1W-AD04U?\u003c\/p\u003e\n\u003cp\u003eYes. Range selections for Pt100, thermocouples, voltage, or current are configured independently per channel in system memory.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the total conversion speed for updating all 4 analog channels?\u003c\/p\u003e\n\u003cp\u003eThe unit completes a conversion cycle for all 4 inputs within a maximum sampling period of 250 ms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the CJ1W-AD04U require an external 24 VDC power supply to operate logic circuits?\u003c\/p\u003e\n\u003cp\u003eNo. The module draws its operational power of 0.32 A directly from the internal 5 VDC PLC backplane bus rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs hot-swapping supported for the CJ1W-AD04U on a live CJ1 PLC rack?\u003c\/p\u003e\n\u003cp\u003eNo. Removing or inserting the input unit while the PLC backplane power is active causes backplane bus errors and stops CPU execution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow many unit numbers does the module occupy in the PLC CPU memory map?\u003c\/p\u003e\n\u003cp\u003eThe CJ1W-AD04U consumes exactly 1 Special I\/O Unit address number set via the rotary switch on the module front panel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if a thermocouple input wire breaks during system operation?\u003c\/p\u003e\n\u003cp\u003eThe module detects a wire disconnection fault, sets a burnout flag bit in CPU memory, and drives the channel value off-scale.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat type of external connection interface is provided on the front panel?\u003c\/p\u003e\n\u003cp\u003eField wiring attaches via a removable screw terminal block, allowing module swap-outs without disconnecting individual signal wires.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow does channel isolation benefit field measurements on process loops?\u003c\/p\u003e\n\u003cp\u003eGalvanic isolation between channels prevents ground loops and electrical interference from skewing signal conversion accuracies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":47306644881581,"sku":"CJ1W-AD04U","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/CJ1W-AD04U_2.jpg?v=1788154976","url":"https:\/\/www.maxwellplc.com\/ru\/products\/cj1w-ad04u-omron-isolated-type-universal-input-unit-cj-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}