{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7231-0HC22-0XA8","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7231-0HC22-0XA8","canonicalUrl":"https://aoctrl.com/siemens/6ES7231-0HC22-0XA8","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7231-0HC22-0XA8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-200 CN analog input EM 231, 6ES7231-0HC22-0XA8, 4 analog inputs differential, 0-10V DC, 12-bit converter, 2 W power loss, 71.2 x 80 x 62 mm.","salesMarkdown":"## Spare-part EM 231 for S7-200 CN racks The Siemens 6ES7231-0HC22-0XA8 is the EM 231 analog input expansion module for the SIMATIC S7-200 CN series, explicitly designated as a spare part and restricted to S7-22X CPUs only. It provides 4 differential analog inputs with a 0-10 V DC range and a 12-bit converter, delivering a resolution of 12 bit including sign over the full-scale span. ## What the 12-bit, 4-channel differential input means for your BOM Four differential inputs reject common-mode noise between the sensor ground and the PLC reference — critical when the analog signals share a cable tray with motor drives or contactors in a panel. The 12-bit converter quantises the 0-10 V span into 4096 counts, giving a theoretical resolution of about 2.44 mV per LSB. For a 4-20 mA shunt resistor this is adequate for process monitoring; it will not resolve microvolt-level thermocouple signals without external amplification. Typical power loss is 2 W — the module draws this from the S7-200 backplane, so the total rack power budget must include this draw alongside the CPU and any other expansion modules. ## Panel fit and mounting dimensions The module measures 71.2 mm wide, 80 mm high, and 62 mm deep — it snaps onto the standard DIN rail alongside the S7-200 CN CPU and occupies one expansion slot. Depth of 62 mm means the module protrudes that far from the DIN rail face; allow clearance for the field-wiring connector and any cable bend radius inside the enclosure. ## Lifecycle and compliance — spare-part status The manufacturer lists this as a current spare part for the S7-200 CN platform, carrying only CE approval — no UL, CSA, or other agency markings are noted on the product record.","metaTitle":"Siemens 6ES7231-0HC22-0XA8 Analog Input Module, 4 AI, 12-bit","metaDescription":"Siemens 6ES7231-0HC22-0XA8 SIMATIC S7-200 CN analog input EM 231 spare part. 4 differential analog inputs, 12-bit resolution. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Analog Input Modules"],"specifications":{"Depth":"62 mm","Width":"71.2 mm","title":"6ES7231-0HC22-0XA8","Height":"80 mm","Current":"Yes","Voltage":"Yes","Resistance":"No","description":"*** spare part *** SIMATIC S7-200 CN analog input EM 231, only for S7-22X CPU, 4 AI, 0-10V DC, 12 bit converter this S7-200 CN product only has CE approval","Thermocouple":"No","lifecycle_stage":"current","Power loss, typ.":"2 W","Resistance thermometer":"No","Number of analog inputs":"4; Difference","Resolution with overrange (bit including sign), max.":"12 bit"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$109.00 – $242.91","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=152658&mlfb=6ES7231-0HC22-0XA8"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 6ES7231-0HC22-0XA8?","answer":"The product record states CE approval only."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7231-0HC22-0XA8","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/6ES7231-0HC22-0XA8 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}}