{"product_id":"siemens-6es5377-0aa21-programmable-logic-controller-module","title":"Siemens 6ES5377-0AA21 Programmable Logic Controller Module","description":"\u003cdiv\u003e\u003cp\u003eSiemens 6ES5377-0AA21 is a memory submodule for the SIMATIC S5 PLC family, part of the 377 RAM module line. This RAM submodule provides 32 KB of volatile storage in a short-design form factor, intended to augment the RAM available to compatible S5 CPUs. It is designed to plug into supported SIMATIC S5 configurations that accept 377 memory modules, offering a straightforward upgrade path for programs and data storage within compatible systems. The component is sold in its packaging, aligning with standard Siemens accessory listings. Typical applications include legacy production lines where additional RAM is needed to accommodate larger or more complex control logic, debugging, or system restoration tasks in older Siemens S5 installations. As a member of the 377 memory-submodule family, the 32 KB RAM capacity in a compact short-type design helps maintain compatibility with existing hardware while extending memory capacity in a reliable, field-replaceable form factor.\u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268502278378,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-018.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/siemens-6es5377-0aa21-programmable-logic-controller-module","provider":"GTG Hardware","version":"1.0","type":"link"}