{"product_id":"mitsubishi-electric-q4mca-2mbs-melsec-q-series-expansion-sram-cassette","title":"Mitsubishi Electric Q4MCA-2MBS MELSEC-Q Series Expansion SRAM Cassette","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eEngineered for high-speed data processing and expansion within the MELSEC-Q control architecture, the \u003cstrong\u003eMitsubishi Electric Q4MCA-2MBS\u003c\/strong\u003e is a high-reliability Static RAM (SRAM) memory cassette. This hardware-level module expands the available volatile storage capacity of compatible high-performance Q-Series CPU modules, enabling handling of extensive file registers, recipe data, system logging, and trace functions. Because it utilizes high-speed SRAM technology, it provides near-instantaneous read and write execution cycles crucial for time-critical industrial processes.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2 Megabytes Capacity:\u003c\/strong\u003e Provides expanded storage space dedicated to device memory and file registers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Speed Access:\u003c\/strong\u003e Low-latency volatile memory technology designed to match high-performance PLC CPU cycle times.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Interface:\u003c\/strong\u003e Slide-in installation directly into the designated CPU memory cassette slot.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Durability:\u003c\/strong\u003e Solid-state architecture built to withstand severe physical vibrations and temperature swings common to factory floor environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003eExpanded recipe handling and production batch tracking on assembly lines.\u003c\/li\u003e\n  \u003cli\u003eHigh-density data logging, trending, and diagnostic buffering in process automation.\u003c\/li\u003e\n  \u003cli\u003eStorage of extensive coordinate systems, tool matrices, and motion profiles in complex packaging systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\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; font-size: 0.95rem;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; width: 40%;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eQ4MCA-2MBS\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eSeries Name\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eMELSEC-Q Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMemory Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eSRAM (Static RAM)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMemory Capacity\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e2 Mbytes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eDimensions (H x W x D)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e4.9 cm x 3.2 cm x 1.85 cm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.02 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1.00 kg (protective packaging included)\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; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.25rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eBecause this expansion card uses volatile SRAM technology, memory retention is fully dependent on the host CPU battery system (such as the Q6BAT). If the system is powered down and the CPU battery level drops below the operational threshold, all register data and files hosted on the memory cassette will be permanently lost. It is critical to implement regular automated backups from the volatile cassette to a non-volatile flash ROM card or external SCADA\/HMI server.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.25rem;\"\u003eCommissioning \u0026amp; Handling Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eBefore mounting or unmounting the cassette, verify the static potential of your work area. Always wear an ESD-grounded wrist strap when handling the card to prevent localized electrostatic discharge from damaging the exposed memory bus contacts on the rear connector interface.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 15px; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 5px;\"\u003eCRITICAL ELECTRICAL SAFETY WARNING\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0; font-size: 0.95rem;\"\u003eDo not attempt to insert or extract the memory cassette while the PLC main power supply or expansion chassis power is energized. Failing to completely de-energize the unit will cause physical short-circuits on the CPU interface bus, destroying the CPU module, the memory cassette, or corrupting active running registers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; display: inline-flex; justify-content: center; align-items: center; min-width: 24px; height: 24px; border-radius: 50%; margin-right: 12px; font-weight: bold; font-size: 0.9rem;\"\u003e1\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003ePower down the entire rack assembly containing the host CPU and verify that the power LED status indicator is completely off.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; display: inline-flex; justify-content: center; align-items: center; min-width: 24px; height: 24px; border-radius: 50%; margin-right: 12px; font-weight: bold; font-size: 0.9rem;\"\u003e2\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003eOpen the protective front cover of the Q-Series CPU module to expose the integrated cassette slots.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; display: inline-flex; justify-content: center; align-items: center; min-width: 24px; height: 24px; border-radius: 50%; margin-right: 12px; font-weight: bold; font-size: 0.9rem;\"\u003e3\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003eAlign the keying guides on the sides of the Q4MCA-2MBS with the guide tracks inside the CPU slot. Slide the cassette firmly forward until it clicks securely into place.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; display: inline-flex; justify-content: center; align-items: center; min-width: 24px; height: 24px; border-radius: 50%; margin-right: 12px; font-weight: bold; font-size: 0.9rem;\"\u003e4\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003eSecure the cassette latch (if equipped), close the CPU module cover, restore system power, and perform a memory format and configuration check using GX Developer or GX Works2 software.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102142423403,"sku":"Q4MCA-2MBS","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/q4mca-2mbs-2wqxzp3qqor.png?v=1776137941","url":"https:\/\/www.plcprotech.com\/products\/mitsubishi-electric-q4mca-2mbs-melsec-q-series-expansion-sram-cassette","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}