{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6GK7343-1GX21-0XE0","brand":"Siemens","brandSlug":"siemens","productSlug":"6GK7343-1GX21-0XE0","canonicalUrl":"https://aoctrl.com/siemens/6GK7343-1GX21-0XE0","factsUrl":"https://aoctrl.com/api/mcp/products/6GK7343-1GX21-0XE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens CP 343-1 Advanced, 6GK7343-1GX21-0XE0, Industrial Ethernet communications processor for S7-300, 10/100 Mbit/s, RJ45, DCP, NTP, LLDP, C-PLUG, 24 V DC, 14.7 W, IP20, double-width compact module.","salesMarkdown":"The Siemens 6GK7343-1GX21-0XE0 is a CP 343-1 Advanced communications processor that connects an S7-300 PLC to Industrial Ethernet at 10/100 Mbit/s via a single RJ45 port. It mounts on the S7-300 rail and occupies a double-width slot, measuring 80 mm wide by 125 mm high by 120 mm deep. Powered by 24 V DC through a 2-pole pluggable terminal block, the module dissipates 14.7 W and is rated IP20 for use inside a control cabinet. ## Key protocol and service support The processor supports DCP (Discovery and Configuration Protocol) for device identification and parameter assignment on PROFINET networks, NTP for time synchronization across the plant, and LLDP for automatic topology discovery. TCP/IP and SNMP v1 are available for standard network integration, and the module includes ACL (IP-based access control list) for restricting communication to trusted stations. A C-PLUG slot lets you store the configuration on a removable medium, so a replacement module can be swapped in without re-commissioning. ## Memory and data handling The module provides 30 Mibyte of RAM for data buffering and 28 Mibyte of flash file system for storing FTP files, email attachments, or web pages. It can act as an FTP client (up to 10 simultaneous connections) and as an FTP server (up to 2 connections), and supports email client functionality with one maximum connection.","metaTitle":"Siemens 6GK7343-1GX21-0XE0 CP 343-1 Advanced, Industrial Eth","metaDescription":"Siemens 6GK7343-1GX21-0XE0 CP 343-1 Advanced communications processor for S7-300. 10/100 Mbit/s Industrial Ethernet, DCP, NTP, LLDP, C-PLUG, 24 V, IP20. Current lifecycle. Availabl","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC Communication Modules"],"specifications":{"DCP":"Yes","NTP":"Yes","LLDP":"Yes","Depth":"120 mm","Width":"80 mm","C-PLUG":"Yes","Height":"125 mm","TCP/IP":"Yes","as RAM":"30 Mibyte","Maximum":"16","SNMP v1":"Yes","Required":"STEP 7 V5.3 SP2 or higher","Module Format":"Compact module S7-300 double width","ACL - IP-based":"Yes","During Storage":"-40 ... +70 °C","Supply Voltage":"24 V","power loss [W]":"14.7 W","Ring Redundancy":"No","lifecycle_stage":"current","During Transport":"-40 ... +70 °C","For Power Supply":"2-pole plugable terminal block","protection class IP":"IP20","At The 1st Interface":"10 ... 100 Mbit/s","S7-300 rail mounting":"Yes","Security Information":"Siemens provides products and solutions with industrial security functions that support the secure operation of plants, solutions, machines, equipment and/or networks. They are important components in a holistic industrial security concept. With this in mind, Siemens’ products and solutions undergo continuous development. Siemens recommends strongly that you regularly check for product updates. For the secure operation of Siemens products and solutions, it is necessary to take suitable preventive action(e.g. cell protection concept) and integrate each component into a holistic, state-of-the-art industrial security concept. Third-party products that may be in use should also be considered. For more information about industrial security, visit http://www.siemens.com/industrialsecurity. To stay informed about product updates as they occur, sign up for a product-specific newsletter. For more information, visit http://support.automation.siemens.com. (V3.4)","Product Feature / Switch":"No","As Email Client / Maximum":"1","Supply Voltage / External":"24 V","As Flash Memory File System":"28 Mibyte","for PROFINET CBA / required":"SIMATIC iMap V2.0 SP1 and higher","number of Multicast stations":"16","ACL - IP-based for PLC/routing":"No","product function / MIB support":"Yes","Log File For Unauthorized Access":"No","of Industrial Ethernet interface":"RJ45 port","I&M0 - device-specific information":"Yes","product function / SICLOCK support":"Yes","Switch-Off Of Non-Required Services":"No","as client / by means of FTP / maximum":"10","as server / by means of FTP / maximum":"2","as server / by means of HTTP / maximum":"4","Supply Voltage / 1 / From Backplane Bus":"5 V","Type Of Voltage / Of The Supply Voltage":"DC","Product Function / Web-Based Diagnostics":"Yes","Blocking Of Communication Via Physical Ports":"No","For Vertical Installation / During Operation":"0 ... 40 °C","from backplane bus / at DC / at 5 V / typical":"0.14 A","relative negative tolerance / at DC / at 24 V":"15 %","relative positive tolerance / at DC / at 24 V":"20 %","Data Volume / As User Data For Email / Maximum":"8 Kibyte","Product Function / Pass On Time Synchronization":"Yes","supply voltage / external / at DC / rated value":"24 V","number of connections / with PROFINET CBA / total":"1000","For Horizontally Arranged Busbars / During Operation":"0 ... 60 °C","I&M1 - higher level designation/location designation":"Yes","Number Of Active Connections / With Multi-Protocol Mode":"48","at the 1st interface / according to Industrial Ethernet":"RJ45 port","number of interfaces / according to Industrial Ethernet":"1","number of remote connection partners / with PROFINET CBA":"64","Number Of Possible Write Cycles / Of The Flash Memory Cells":"100000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$444.44","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=82142&mlfb=6GK7343-1GX21-0XE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6GK7343-1GX21-0XE0/alternatives.json"},"ai":{"faq":[{"question":"What does DCP support mean on this CP 343-1?","answer":"DCP (Discovery and Configuration Protocol) lets you assign IP addresses and device names to the module over PROFINET without a programming device — useful for initial commissioning and replacement."},{"question":"What is the NTP function used for?","answer":"NTP (Network Time Protocol) synchronizes the module's clock with a plant-wide time server, which is critical for time-stamped alarms and coordinated data logging across distributed controllers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6GK7343-1GX21-0XE0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6GK7343-1GX21-0XE0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}