{"product_id":"omron-cqm1h-cpu51-cqm1h-series-cpu-unit","title":"Omron CQM1H-CPU51 CQM1H Series CPU Unit","description":"\u003cp\u003eThe \u003cstrong\u003eOmron CQM1H-CPU51\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eCQM1H-CPU51\u003c\/strong\u003e CPU Unit, operates as a dedicated hardware component for centralized program execution and I\/O processing within Omron CQM1H PLC systems.\u003c\/p\u003e\n\u003ch3\u003eTechnical Identifier Matrix\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eComponent Variable\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDesignation \/ Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003eCQM1H-CPU51\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\u003eSystem Platform\u003c\/td\u003e\n\u003ctd\u003eCQM1H Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Classification\u003c\/td\u003e\n\u003ctd\u003eProgrammable Logic Controller CPU Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated Features\u003c\/td\u003e\n\u003ctd\u003eBuilt-in RS-232C Port, Inner Board Slot Support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003eCQM1H-CPU51\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\u003e0.40 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e11.0 cm x 10.7 cm x 9.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e15.0 cm x 14.0 cm x 12.0 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\u003e10 W max at 5 VDC (internal backplane draw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgram Capacity\u003c\/td\u003e\n\u003ctd\u003e7.2k words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Memory Capacity\u003c\/td\u003e\n\u003ctd\u003e6k words (DM area)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Local I\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e512 points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessing Speed\u003c\/td\u003e\n\u003ctd\u003e0.375 to 1.15 us (basic instructions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interface\u003c\/td\u003e\n\u003ctd\u003e1x RS-232C port (9-pin D-sub)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOption Slots\u003c\/td\u003e\n\u003ctd\u003e2x Inner Board slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Throughput and Firmware Determinism\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eOmron CQM1H-CPU51\u003c\/strong\u003e utilizes a parallel backplane bus architecture designed to maximize I\/O refresh speed across local expansion modules. Backplane bus velocity allows high-speed instruction cycles down to 0.375 microseconds for basic logical operations, mitigating execution jitter during complex industrial sequences. Firmware flash memory execution ensures steady control throughput, maintaining deterministic scan times even when housing up to two optional Inner Boards (such as High-Speed Counter or Serial Communications boards).\u003c\/p\u003e\n\u003ch3\u003ePackage Contents \u0026amp; Ordering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Omron CQM1H-CPU51 Central Processing Unit\u003c\/li\u003e\n\u003cli\u003e1x Protective Terminal Block Cover\u003c\/li\u003e\n\u003cli\u003e1x Hardware 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\u003eMounting:\u003c\/strong\u003e Secure the CPU unit onto a standard 35 mm DIN rail (IEC 60715). Ensure the locking sliders fully engage to resist vibration. Maintain a minimum clearance of 20 mm above and below the unit for convection cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring \u0026amp; Grounding:\u003c\/strong\u003e Connect the functional ground terminal directly to a dedicated earth ground point using a cable with a cross-section of at least 2.0 mm sq. Ensure the ground impedance remains below 100 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding:\u003c\/strong\u003e Route all serial communication lines (RS-232C) separately from high-voltage AC lines. Ground the cable shield at a single end near the controller using a 360-deg grounding clamp to prevent ground loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Board Assembly:\u003c\/strong\u003e Always remove power from the CPU backplane before inserting or removing Inner Boards into Option Slots 1 or 2 to avoid latch-up conditions or semiconductor damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum local I\/O capacity supported by the CQM1H-CPU51?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CPU unit directly addresses up to 512 local I\/O points across connected expansion units.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan the CQM1H-CPU51 be inserted or removed while power is applied to the backplane?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, live insertion or removal is prohibited. Main power must be completely disconnected prior to servicing or installing modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat serial communication interfaces are integrated on the front panel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOne RS-232C port (9-pin D-sub connector) is standard for direct PC programming, HMI connectivity, or peripheral node attachment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat option slots are available for functional expansion on this CPU?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit contains 2 Inner Board slots that accept specialized modules, including high-speed counters, analog I\/O, or serial communication boards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow is program memory handled in the event of an extended power outage?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProgram memory and DM data are maintained in non-volatile RAM backed up by an internal lithium battery.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the execution instruction speed for basic PLC logic?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBasic instructions execute within a deterministic window of 0.375 to 1.15 microseconds per instruction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat grounding standard must be followed during cabinet field wiring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConnect a dedicated ground wire (minimum 2.0 mm sq) to the ground terminal, maintaining a ground resistance of less than 100 ohms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the CPU support external memory cards for program storage?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, optional Memory Cassettes (Flash Memory or EEPROM) can be installed to store user programs and parameter sets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":47306630430893,"sku":"CQM1H-CPU51","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/cqm1h-cpu51_6.jpg?v=1789364236","url":"https:\/\/www.maxwellplc.com\/ru\/products\/omron-cqm1h-cpu51-cqm1h-series-cpu-unit","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}