{"product_id":"siemens-simatic-s5-6es5-700-8ma21-bus-unit-module","title":"Siemens 6ES5700-8MA21 SIMATIC S5 Bus Unit Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5700-8MA21 is a specialized bus unit module designed for the SIMATIC S5 automation series. This hardware component functions as a foundational backplane interface, enabling the secure mounting and electrical interconnection of up to two plug-in modules within a distributed I\/O rack. It is engineered to maintain stable communication pathways in demanding industrial environments, ensuring consistent signal integrity for legacy PLC control systems.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupports configuration of up to 2 plug-in modules.\u003c\/li\u003e\n\u003cli\u003eUtilizes a robust crimp snap-in connection design for reliable mechanical and electrical contact.\u003c\/li\u003e\n\u003cli\u003eHigh isolation voltage rating of 500 VAC to protect against electrical transients.\u003c\/li\u003e\n\u003cli\u003eLow power consumption architecture, drawing approximately 1 mA.\u003c\/li\u003e\n\u003cli\u003eDesigned for integration into standard industrial control cabinets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis bus unit is primarily utilized in legacy Siemens SIMATIC S5 control architectures. It is commonly found in heavy industrial sectors, including power generation, oil and gas processing, and mining, where it serves as a critical link in remote I\/O rack configurations to prevent data loss and system downtime.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5 700-8MA21\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\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eBus Unit Module\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 Type\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 control cabinet power is fully disconnected before installing or removing the bus unit or any associated plug-in modules.\u003c\/li\u003e\n\u003cli\u003eVerify that the mounting surface is clean and level to prevent mechanical stress on the backplane.\u003c\/li\u003e\n\u003cli\u003eUse caution when engaging the crimp snap-in connectors to ensure a gas-tight, vibration-resistant fit.\u003c\/li\u003e\n\u003cli\u003eMaintain adequate ventilation within the cabinet to stay within the 0 to 60 deg C operating range.\u003c\/li\u003e\n\u003cli\u003eFollow standard ESD (Electrostatic Discharge) protocols when handling the module to protect internal circuitry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the 6ES5 700-8MA21?\u003c\/h3\u003e\u003cp\u003eThis module acts as a bus unit for the SIMATIC S5 system, providing the necessary mechanical and electrical backplane interface to host and communicate with up to two plug-in modules.\u003c\/p\u003e\u003ch3\u003eIs this module compatible with modern S7 systems?\u003c\/h3\u003e\u003cp\u003eNo, this unit is specifically engineered for the legacy SIMATIC S5 series architecture.\u003c\/p\u003e\u003ch3\u003eWhat is the weight of this unit?\u003c\/h3\u003e\u003cp\u003eThe unit weighs approximately 0.2 kg.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51213724516604,"sku":"6ES5700-8MA21","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_eaa9815e-dcef-4973-9b6d-f035e4136412.jpg?v=1788244135","url":"https:\/\/www.electronicplc.com\/products\/siemens-simatic-s5-6es5-700-8ma21-bus-unit-module","provider":"Electronic PLC","version":"1.0","type":"link"}