{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7216-2AD21-0XB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7216-2AD21-0XB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7216-2AD21-0XB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7216-2AD21-0XB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-200 CPU 226 compact unit, 6ES7216-2AD21-0XB0, 24 VDC supply, 24 digital inputs DC / 16 digital outputs DC, 8 KB code / 5 KB data memory, 2 PPI/FREEPORT ports.","salesMarkdown":"## CPU 226 I/O and memory budget The Siemens 6ES7216-2AD21-0XB0 is an S7-200 CPU 226 compact unit running on 24 VDC supply, packing 24 digital inputs and 16 digital outputs — 40 local I/O points that cover most standalone machine control without an expansion rack. The 8 KB code / 5 KB data memory ceiling means the application firmware and symbol table fit within a tight budget; ladder logic with extensive indirect addressing or recipe arrays will hit the data limit before the code limit. Two PPI/FREEPORT ports let the CPU talk to operator panels, drives, or a second programmer without a switch — useful when the HMI sits on one port and the commissioning laptop on the other. The FREEPORT mode supports user-defined serial protocols up to 38.4 kbaud.","metaTitle":"Siemens 6ES7216-2AD21-0XB0 S7-200 CPU 226, 24 DI/16 DO DC","metaDescription":"Siemens 6ES7216-2AD21-0XB0 S7-200 CPU 226 compact unit. 24 DC inputs, 16 DC outputs, 8 KB code/5 KB data, 2 PPI/FREEPORT ports.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"title":"6ES7216-2AD21-0XB0","Part #":"6ES7216-2AD21-0XB0","Weight":"0.25 kgs","Category":"Control Devices","description":"SIMATIC S7-200, CPU 226 COMPACT UNIT, DC POWER SUPPLY 24 DI DC/16 DO DC, 8 KB CODE/5 KB DATA, 2 PPI/FREEPORT PORTS","Sub Category":"CPU & Control Circuit Boards","Top Category":"Automation and Control Systems","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$369.19","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f197dc5500844272ef47c2d7b0a90673.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=139029&mlfb=6ES7216-2AD21-0XB0"},"ai":{"faq":[{"question":"Is 6ES7216-2AD21-0XB0 compatible with S7-200 expansion modules?","answer":"Yes — the CPU 226 connects to the full range of S7-200 expansion modules (digital, analog, thermocouple, RTD) via the ribbon-cable bus on the right side of the unit. The 24 VDC supply to the CPU also powers the expansion bus; total 5 VDC bus current available for expansion modules is 660 mA."},{"question":"How do I program the Siemens 6ES7216-2AD21-0XB0?","answer":"Use Siemens STEP 7-Micro/WIN software (V4.0 SP9 or later) over the PPI port with a PC/PPI cable or USB-PPI adapter. The two integrated PPI/FREEPORT ports allow online access on one port while the other runs the HMI or a serial device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7216-2AD21-0XB0","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/6ES7216-2AD21-0XB0 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}}