{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7351-1AH01-0AE0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7351-1AH01-0AE0","canonicalUrl":"https://aoctrl.com/siemens/6ES7351-1AH01-0AE0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7351-1AH01-0AE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 FM 351 positioning module, 8 digital inputs, 8 digital outputs, incremental/SSI encoder interface, 24 VDC, EOL.","salesMarkdown":"## Positioning module for two-axis cam control The Siemens 6ES7351-1AH01-0AE0 is an FM 351 positioning module for the S7-300 rack, handling rapid traverse, creep, run right, and run left motion profiles on two independent axes. It accepts incremental encoders (symmetrical or asymmetrical) and absolute SSI encoders, with a maximum input frequency of 50 kHz at 25 m cable length, dropping to 25 kHz at the full 100 m cable run. ## Encoder interface and I/O constraints The encoder input is a 5 V differential signal (RS-422 physical layer) with complementary clock and data lines — CL/notCL and DATA/notDATA — plus a zero-mark signal N and trace marks A, B. Eight digital inputs sink 24 VDC with a signal \"1\" threshold of +11 to +30 V and a residual current limit of 0.5 mA for signal \"0\"; eight digital outputs each source up to 400 mA with short-circuit protection. The module draws 350 mA from the backplane (5 V present) and requires a single 20-pin front connector. ## EOL — sourcing through independent channels The module is sourced through independent distribution against an RFQ.","metaTitle":"Siemens 6ES7351-1AH01-0AE0 FM 351 Positioning Module, EOL","metaDescription":"Siemens FM 351 positioning module for S7-300, 8 DI/8 DO, 50 kHz incremental encoder input, SSI absolute encoder support. EOL — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"5 V":"Yes","24 V":"Yes","Max.":"70 °C","Min.":"-40 °C","Depth":"120 mm","Width":"80 mm","Height":"125 mm","Functions":"Rapid traverse, creep, run right, run left","Gray code":"1","Data signal":"DATA, notDATA","Clock signal":"CL, notCL","Input signal":"5 V difference signal (phys. RS 422)","2-Wire Sensor":"Yes","Input voltage":"24 V","For Signal \"0\"":"-3 to +5V","For Signal \"1\"":"+11 to +30V","Weight, approx.":"550 g","lifecycle_stage":"eol_hot","Rated value (DC)":"24 V","Zero mark signal":"N","Cable length, max.":"100 m","Trace mark signals":"A, B","For Signal \"1\", Min.":"UP - 0.8 V","For Signal \"1\", Typ.":"6 mA","Output current, max.":"400 mA; Per channel","Clock frequency, max.":"1 MHz","Input frequency, max.":"50 kHz; 50 kHz for 25 m cable length; 25 kHz for 100 m cable length","Absolute encoder (SSI)":"Yes","Number of digital inputs":"8","Required Front Connector":"1x 20-pin","Short-circuit protection":"Yes","Current consumption, max.":"350 mA","Number of digital outputs":"8","Cable length, shielded, max.":"300 m; at max. 125 kHz","Telegram length, parameterizable":"13 or 25 bit","Incremental encoder (symmetrical)":"Yes","Incremental encoder (asymmetrical)":"Yes","Potential separation digital inputs":"Yes","Potential separation digital outputs":"Yes","For Signal \"0\" Residual Current, Max.":"0.5 mA","Permissible Quiescent Current (2-Wire Sensor), Max.":"2 mA; on signal \"0\", max. 2 mA; on signal \"1\", max. 6 mA","For Signal \"0\", Max. (Permissible Quiescent Current)":"2 mA","for signal \"1\" permissible range for 0 to 60 °C, max.":"600 mA; with UPmax","for signal \"1\" permissible range for 0 to 60 °C, min.":"5 mA; with UPmax"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$520.70","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=452970&mlfb=6ES7351-1AH01-0AE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7351-1AH01-0AE0/alternatives.json"},"ai":{"faq":[{"question":"What encoder types does the FM 351 support?","answer":"It supports incremental encoders (symmetrical and asymmetrical) and absolute SSI encoders with a parameterizable telegram length of 13 or 25 bits. The input is a 5 V differential RS-422 signal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7351-1AH01-0AE0","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/6ES7351-1AH01-0AE0 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}}