{"product_id":"mitsubishi-electric-q12prhcpu-melsec-q-series-redundant-plc-cpu-module","title":"Mitsubishi Electric Q12PRHCPU MELSEC Q Series Redundant PLC CPU Module","description":"\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDesigned to ensure high-availability control in critical automation environments, the \u003cstrong\u003eMitsubishi Electric Q12PRHCPU\u003c\/strong\u003e operates as a high-performance redundant CPU module within the MELSEC Q Series platform. This module is engineered to prevent system downtime by utilizing a dual-redundant architecture where a backup CPU instantly assumes control in the event of a primary CPU failure. It features a program capacity of \u003cstrong\u003e120k steps\u003c\/strong\u003e and supports up to \u003cstrong\u003e4096 physical I\/O points\u003c\/strong\u003e, making it suitable for large-scale, fault-tolerant industrial operations.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eRedundant System Architecture:\u003c\/strong\u003e Supports hot-standby redundancy with automatic, bumpless switchover to prevent process interruption.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eHigh-Speed Processing:\u003c\/strong\u003e Delivers an LD instruction execution speed of 34 nanoseconds (0.034 microseconds) for rapid task execution.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eHot-Swappable Capability:\u003c\/strong\u003e Allows online module replacement of the standby CPU, power supply, and network modules without stopping the active control process.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eDual Programming Interfaces:\u003c\/strong\u003e Equipped with both USB (Mini-B) and RS-232 (Mini-DIN) ports for flexible programming, diagnostics, and monitoring.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eExtensive Memory Capacity:\u003c\/strong\u003e Provides 120k steps of program memory alongside dedicated tracking memory for seamless data synchronization between active and standby units.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eWater treatment and municipal wastewater processing plants.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eContinuous chemical, petrochemical, and pharmaceutical processing lines.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003ePower generation, substation automation, and utility distribution networks.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eTunnel ventilation, public transit power systems, and critical infrastructure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eQ12PRHCPU\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eSeries\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eMELSEC Q Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModule Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eRedundant PLC CPU Module\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eProgram Capacity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e120k steps (480 KB)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eI\/O Points (Physical)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e4096 points\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eI\/O Points (Device)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e8192 points\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eLD Instruction Speed\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0.034 microseconds (34 ns)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eCurrent Consumption (5 VDC)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0.89 A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0 to 55 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eStorage Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e-25 to 75 degC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eRelative Humidity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e5 to 95% RH (non-condensing)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0.30 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e2.00 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eDimensions (W x H x D)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e27.4 mm x 98 mm x 115 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eJapan\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem;\"\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold;\"\u003eInterface Port\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold;\"\u003eConnector Type\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold;\"\u003eFunctional Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eRS-232 Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eMini-DIN 6-Pin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eSerial programming, peripheral connection, and system diagnostics.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eUSB Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eMini-B\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eHigh-speed programming, monitoring, and parameter configuration via GX Works2.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eTracking Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eDedicated Redundant Connector\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eHigh-speed tracking cable connection to synchronize memory with the standby CPU.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem;\"\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe Q12PRHCPU must be used in conjunction with redundant base units (such as the Q38RB or Q68RB) and redundant power supply modules (Q61P-D). It cannot be mixed with standard Q-series CPUs on a standard base unit for redundant operations. When replacing older Q12HCPU modules, note that standard non-redundant base units are incompatible with the physical tracking interface and dual-bus routing of the redundant series.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTracking cable length is a critical constraint. Standard tracking cables (QC10TR or QC30TR) are limited to 3 meters. Exceeding this distance or using non-shielded custom cables can introduce electromagnetic interference, leading to tracking synchronization failures (such as \"SP.UNIT LAY. ERR\" or \"CONTROL CPU ERROR\"). Additionally, optimize the tracking data size settings in GX Works2 to prevent excessive scan time extensions during synchronization cycles.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eBefore powering up the redundant system, verify that both the primary (System A) and standby (System B) CPU modules have identical firmware versions. Discrepancies in firmware can prevent the standby CPU from entering the \"BACKUP\" state, leaving the system in a non-redundant, single-CPU run mode. Always download identical parameter files and program blocks to both units before executing the initial system synchronization.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #9b2c2c;\"\u003eCRITICAL WARNING:\u003c\/p\u003e\n  \u003cp style=\"margin: 0.5rem 0 0 0; color: #2d3748;\"\u003eEnsure all external power sources feeding the base unit and associated I\/O racks are completely de-energized before mounting or removing the CPU modules. Failure to isolate power can result in electrical arcing, damage to the internal backplane bus, or unexpected control system state changes.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: center; margin-bottom: 0.75rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e1\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eMount the CPU module securely onto the redundant base unit (Q38RB or Q68RB), ensuring the bottom locking tab clicks firmly into place.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: center; margin-bottom: 0.75rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e2\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eConnect the dedicated tracking cable between the tracking ports of the two Q12PRHCPU modules to establish the synchronization link.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: center; margin-bottom: 0.75rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e3\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eSecure the tracking cable connectors using the integrated retention screws to prevent accidental disconnection due to panel vibration.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: center; margin-bottom: 1.5rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e4\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eEstablish a solid functional ground connection from the base unit's LG and FG terminals to the main control cabinet ground bus.\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102137016683,"sku":"Q12PRHCPU","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/Q12PRHCPU-oqjzagkuoxu.png?v=1776137925","url":"https:\/\/www.plcprotech.com\/ms\/products\/mitsubishi-electric-q12prhcpu-melsec-q-series-redundant-plc-cpu-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}