{"product_id":"1775-mea-allen-bradley-memory-module-plc-3","title":"1775-MEA Allen-Bradley Memory Module PLC-3","description":"\u003cp\u003eConfigured for memory storage within PLC-3 control hardware, the \u003cstrong\u003eAllen-Bradley 1775-MEA\u003c\/strong\u003e (\u003cstrong\u003e1775MEA\u003c\/strong\u003e Memory Module) provides RAM-based data storage through the PLC backplane interface. The supplied data identifies it as an error-correcting RAM module with 5 VDC backplane power.\u003c\/p\u003e\n\u003ch3\u003eModel Identification\u003c\/h3\u003e\n\u003cp\u003eThe supplied information identifies 1775-MEA as a PLC-3 memory module. No validated suffix breakdown is provided, so the catalog designation is retained without assigning functional meaning to individual characters.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003e1775-MEA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpare Model\u003c\/td\u003e\n\u003ctd\u003e1775MEA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003ePLC-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eMemory Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Technology\u003c\/td\u003e\n\u003ctd\u003eError Correcting RAM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003eSupplied data lists both 64K and 4K Words (8 KB); verify against the module label or original documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWord Length\u003c\/td\u003e\n\u003ctd\u003e16-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e5 VDC +\/-5% via backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Current\u003c\/td\u003e\n\u003ctd\u003e35 uA in backup mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e5-95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e5.1 x 27.9 x 30.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8537101190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipment Origin\u003c\/td\u003e\n\u003ctd\u003eXiamen, China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-3 Memory Interface Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1775-MEA receives 5 VDC power through the PLC backplane and operates as a memory component within the PLC-3 hardware architecture. The supplied specification identifies 1.5 W typical power consumption and 35 uA battery current in backup mode.\u003c\/p\u003e\n\u003cp\u003eThe supplied product description states 64K error-correcting RAM, while the detailed specification states 4K Words (8 KB). These values are inconsistent because 64K capacity and 4K Words represent different memory sizes. The exact installed capacity should therefore be confirmed from the physical module marking or applicable Allen-Bradley documentation before procurement or replacement.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1775-MEA memory module\u003c\/li\u003e\n\u003cli\u003e1 x Memory module hardware\u003c\/li\u003e\n\u003cli\u003eNo additional mounting kit, programming device, or external accessory is identified in the supplied data\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation and Handling\u003c\/h3\u003e\n\u003ch4\u003eBackplane Installation\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module only in a compatible PLC-3 hardware configuration.\u003c\/li\u003e\n\u003cli\u003eConfirm the backplane connector is clean and free of conductive contamination before insertion.\u003c\/li\u003e\n\u003cli\u003eRemove power before installing or removing the module unless the applicable PLC-3 documentation explicitly permits energized replacement.\u003c\/li\u003e\n\u003cli\u003eDo not force the module into the backplane connector.\u003c\/li\u003e\n\u003cli\u003eVerify that the module is mechanically seated before restoring system power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eElectrical Practices\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the backplane supply provides the specified 5 VDC +\/-5%.\u003c\/li\u003e\n\u003cli\u003eKeep memory module wiring and adjacent conductors free from unnecessary electromagnetic interference sources.\u003c\/li\u003e\n\u003cli\u003eMaintain proper cabinet grounding and bonding according to the control system installation requirements.\u003c\/li\u003e\n\u003cli\u003eAvoid handling connector contacts directly to reduce contamination and electrostatic discharge risk.\u003c\/li\u003e\n\u003cli\u003eObserve ESD precautions when handling the memory module outside its installed position.\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 controller family is the 1775-MEA associated with?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe supplied data identifies the 1775-MEA as a memory module for the Allen-Bradley PLC-3 platform.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat backplane voltage does the module require?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe specified requirement is 5 VDC +\/-5%, supplied through the PLC backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the typical power consumption?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe supplied specification lists 1.5 W typical power consumption during normal operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the battery current specification?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBattery current is specified as 35 uA in backup mode. No additional battery characteristics are provided in the supplied data.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature range is specified for operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe stated operating temperature range is 0 deg C to +60 deg C. Storage is specified separately from -40 deg C to +85 deg C.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the supplied data confirm the exact memory capacity?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. It lists both 64K error-correcting RAM and 4K Words (8 KB). The physical module marking or original documentation should resolve this conflict.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs hot-swapping supported?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHot-swapping is not confirmed by the supplied information. Treat the module as a power-off installation unless the applicable PLC-3 documentation explicitly permits energized replacement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat environmental humidity is specified?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe specified humidity range is 5-95% RH, non-condensing. Installation should prevent condensation inside the control enclosure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066446008493,"sku":"1775-MEA","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1775-MEA.jpg?v=1786542229","url":"https:\/\/www.maxwellplc.com\/products\/1775-mea-allen-bradley-memory-module-plc-3","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}