{"product_id":"siemens-simatic-s5-6es5-700-8ma21-bus-unit-module","title":"Siemens 6ES5700-8MA21 SIMATIC S5 Bus Unit Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5700-8MA21 is a specialized bus unit module designed for the SIMATIC S5 legacy control ecosystem. This component acts as a foundational backplane interface, providing the necessary physical and electrical connectivity to support distributed I\/O configurations. By facilitating stable communication between the controller and connected sub-modules, it ensures reliable signal integrity in demanding industrial environments such as power generation facilities, chemical processing plants, and heavy manufacturing sectors.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for integration within SIMATIC S5 remote rack architectures.\u003c\/li\u003e\n\u003cli\u003eSupports the installation of up to 2 plug-in modules.\u003c\/li\u003e\n\u003cli\u003eUtilizes a robust crimp snap-in connection mechanism for secure mechanical and electrical seating.\u003c\/li\u003e\n\u003cli\u003eHigh isolation voltage of 500 VAC to protect against transient electrical interference.\u003c\/li\u003e\n\u003cli\u003eOptimized for low-heat operation with a minimal 1 mA current draw.\u003c\/li\u003e\n\u003cli\u003eEngineered for consistent performance across a wide operating temperature range.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis bus unit is primarily deployed in legacy PLC environments where reliable backplane communication is required for remote I\/O subsystems. It is suitable for process automation loops that demand high availability and protection against signal degradation, commonly found in energy, mining, and large-scale industrial infrastructure.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5700-8MA21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e2 Plug-in Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e9 to 12 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e500 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.012 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Method\u003c\/td\u003e\n\u003ctd\u003eCrimp snap-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the main power supply is disconnected before installing or removing the bus unit or any associated modules.\u003c\/li\u003e\n\u003cli\u003eMount the unit on a standard, vibration-resistant rail to ensure the integrity of the crimp snap-in connections.\u003c\/li\u003e\n\u003cli\u003eMaintain adequate spacing within the control cabinet to allow for proper airflow, despite the low thermal footprint of this module.\u003c\/li\u003e\n\u003cli\u003eHandle with care to avoid damage to the backplane pins; ensure modules are fully seated to prevent intermittent connection failures.\u003c\/li\u003e\n\u003cli\u003eVerify that the cabinet environment remains within the specified 0 to 60 deg C operating range to ensure long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":48890999144638,"sku":"6ES5700-8MA21","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/wm_1_8647af15-9ccb-44b0-a956-f194a4850a16.jpg?v=1789087972","url":"https:\/\/www.autooiltech.com\/ar\/products\/siemens-simatic-s5-6es5-700-8ma21-bus-unit-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}