{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7231-7PD20-0XA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7231-7PD20-0XA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7231-7PD20-0XA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7231-7PD20-0XA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-200 EM 231 thermocouple input module, 6ES7231-7PD20-0XA0, 4 analog inputs, +/-80 mV, 15-bit + sign, thermocouple types J,K,S,T,R,E,N. For S7-22X CPUs only.","salesMarkdown":"## Thermocouple Input Module for S7-200 The Siemens 6ES7231-7PD20-0XA0 is an EM 231 thermocouple input module that mates exclusively with S7-22X CPUs. It provides four analog inputs configurable for +/-80 mV or direct thermocouple connection across types J, K, S, T, R, E, and N, with 15-bit plus sign resolution. ## Mounting and Signal Integrity Thermocouple signals are low-level and noise-sensitive. Keep unshielded runs short; for longer distances, use shielded twisted-pair thermocouple extension wire with the shield grounded at the panel end only. The 15-bit plus sign resolution provides enough granularity for most process loops, but expect to filter readings in software if VFDs or contactors are nearby. Ground-loop currents on thermocouple wiring can produce offset errors — check the shield continuity before chasing phantom temperature drift.","metaTitle":"6ES7231-7PD20-0XA0 Siemens S7-200 TC Input Module, 4 AI","metaDescription":"Active Siemens EM 231 thermocouple input module for S7-22X CPUs. 4 AI, +/-80 mV, types J,K,S,T,R,E,N, 15-bit + sign. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"title":"6ES7231-7PD20-0XA0","Part #":"6ES7231-7PD20-0XA0","Weight":"0.15 kgs","Category":"PLCs and Accessories","description":"MATIC S7-200, T/C INPUT MOD. EM 231, FOR S7-22X CPU ONLY, 4 AI, +/-80 MV AND THERMOCOUPLE TYPE J,K,S,T,R,E,N; 15BIT+VORZ.","Sub Category":"Industrial Computer Board","Top Category":"PLCs & HMIs","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$354.62","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4e1b047c88d7a611c8aaabc85bee0854.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=394619&mlfb=6ES7231-7PD20-0XA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7231-7PD20-0XA0","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/6ES7231-7PD20-0XA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}