{"product_id":"omron-cj1w-ct021-high-speed-counter-unit-sysmac-cj-nj-series","title":"Omron CJ1W-CT021 High-speed Counter Unit SYSMAC CJ\/NJ Series","description":"\u003cp\u003eThe \u003cstrong\u003eOmron CJ1W-CT021\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eCJ1W-CT021\u003c\/strong\u003e High-speed Counter Unit, operates as a dedicated hardware component for high-frequency pulse counting and encoder feedback processing within SYSMAC CJ\/NJ Series systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical Identifier Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Hardware Model:\u003c\/strong\u003e CJ1W-CT021\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Part Number:\u003c\/strong\u003e CJ1W-CT021\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e High-speed Counter Unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries Family:\u003c\/strong\u003e Omron SYSMAC CJ\/NJ Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Classification:\u003c\/strong\u003e Special I\/O Unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounter Channels:\u003c\/strong\u003e 2 independent channels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Input Frequency:\u003c\/strong\u003e 500 kHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware 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-CT021\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.10 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e6.5 cm x 3.1 cm x 9.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e10.5 cm x 7.1 cm x 13.0 cm\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\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e280 mA typical (at 5 VDC), 370 mA max (at 5 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Counters\u003c\/td\u003e\n\u003ctd\u003e2 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Input Frequency\u003c\/td\u003e\n\u003ctd\u003e500 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Response Time\u003c\/td\u003e\n\u003ctd\u003e0.5 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eOmron Backplane Bus Velocity \u0026amp; Real-Time Logic Execution\u003c\/h3\u003e\n\u003cp\u003eThe CJ1W-CT021 transfers pulse count data directly to CPU memory via the high-speed CJ\/NJ internal backplane bus. High-speed hardware counting operates independently of CPU cyclic scan timing, maintaining precision tracking at pulse input frequencies up to 500 kHz. Maximum output response time is bounded at 0.5 ms for direct execution of onboard comparative control routines. Flash firmware compatibility ensures deterministic signal processing without introducing processing delays onto the backplane.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents \u0026amp; Ordering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Omron CJ1W-CT021 High-speed Counter Unit\u003c\/li\u003e\n\u003cli\u003e1x External input\/output connector shell kit\u003c\/li\u003e\n\u003cli\u003e1x Hardware specification instruction sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Assembly:\u003c\/strong\u003e Slide the CJ1W-CT021 onto the CJ\/NJ CPU or expansion rack guide rails until the backplane bus connector fully seats into place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Setup:\u003c\/strong\u003e Route encoder and pulse signal conductors through dedicated shielded cabling away from 230 VAC power lines to prevent signal interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding Standard:\u003c\/strong\u003e Connect high-frequency pulse input cable shields to the system grounding bar using a 360-deg braid grounding clamp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Grounding:\u003c\/strong\u003e Ensure the CPU base rack functional earth terminal connects directly to a panel ground bar with total ground loop resistance under 100 Ohms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIs hot-swapping permitted for the CJ1W-CT021 module on CJ\/NJ series backplanes?\u003c\/p\u003e\n\u003cp\u003eNo. System power to the CPU rack must be isolated prior to insertion or removal of the module to prevent backplane bus damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat maximum current draw does the CJ1W-CT021 place on the 5 VDC internal rack bus?\u003c\/p\u003e\n\u003cp\u003eThe unit draws a typical internal current of 280 mA at 5 VDC, with a maximum rated current consumption of 370 mA at 5 VDC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the highest pulse input frequency supported by the counter channels?\u003c\/p\u003e\n\u003cp\u003eEach of the 2 independent counting channels supports input pulse frequencies up to a maximum limit of 500 kHz.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat total response time is achieved for onboard comparative output switching?\u003c\/p\u003e\n\u003cp\u003eThe internal circuit processing delivers a maximum response execution time of 0.5 ms for output switching functions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat backplane bus mechanism transfers high-speed counter values to the CPU?\u003c\/p\u003e\n\u003cp\u003eThe unit utilizes direct memory mapped I\/O access across the CJ\/NJ backplane bus during each cycle refresh phase.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat cable shielding method must be applied to high-frequency pulse inputs?\u003c\/p\u003e\n\u003cp\u003ePulse signal lines require twisted-pair conductors enclosed in continuous 360-deg braid shielding bonded to panel chassis ground.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat grounding resistance parameter must be maintained at the panel terminal?\u003c\/p\u003e\n\u003cp\u003eThe system ground terminal must be wired to the panel protective copper earth bus with a resistance strictly under 100 Ohms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat temperature storage boundaries apply to uninstalled spare units?\u003c\/p\u003e\n\u003cp\u003eSpare units must remain sealed within anti-static packaging inside storage environments between -20 and +75 deg C non-condensing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":47306606280877,"sku":"CJ1W-CT021","price":205.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/CJ1W-CT021_1.jpg?v=1788102821","url":"https:\/\/www.maxwellplc.com\/ga\/products\/omron-cj1w-ct021-high-speed-counter-unit-sysmac-cj-nj-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}