{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7211-0AA22-0XB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7211-0AA22-0XB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7211-0AA22-0XB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7211-0AA22-0XB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-200 CPU 221, order code 6ES7211-0AA22-0XB0, compact PLC with 24 V DC supply, 3 A max at 40 °C, FBD/LAD/STL programming, integrated RS-485 interface.","salesMarkdown":"## CPU 221 — what it handles in a panel The 6ES7211-0AA22-0XB0: It draws 3 A max at 40 °C, so the panel supply needs headroom above the CPU alone — the 24 V bus must carry the CPU plus any expansion modules or field devices on the same circuit. Programming options cover FBD, LAD, and STL. The CPU executes a free cycle (OB 1), interrupt control, and time-controlled processing from 1 to 255 ms. ## Integrated I/O and communications The CPU 221 carries 6 digital inputs and 4 digital outputs. Inputs are source/sink configurable per group, with two high-speed counters (30 kHz each) on E 0.0 to E 0.5. Outputs include two pulse-train outputs (Q0.0 to Q0.1) with a 2 µs rise time, useful for stepper or servo pulse-direction control without an external motion module. The integrated RS-485 port supports PPI and MPI protocols. PPI handles program upload/download and HMI links (TD 200, OP) at 9.6/19.2/187.5 kbit/s. MPI allows data exchange with other S7-200 CPUs, OPs, and TDs at the same rates. ## Retentive data and backup Program and DB 1 are stored on integral EEPROM — no battery needed for the program. Current DB 1 values, retentive memory bits, timers, and counters are buffered by a high-performance capacitor, giving a minimum 8 h backup at 40 °C and up to 50 h. An optional battery module extends retention to 200 days typical. For a furnace thermal profile that must survive a power dip without reloading the recipe, the capacitor backup covers a shift change; the battery covers a weekend.","metaTitle":"Siemens 6ES7211-0AA22-0XB0 S7-200 CPU 221, 24 V DC, 3 A","metaDescription":"Siemens 6ES7211-0AA22-0XB0 S7-200 CPU 221 PLC, 24 V DC supply, 3 A max at 40 °C. Current production. Quoted to order. FBD/LAD/STL programming.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"FBD":"Yes","LAD":"Yes","MPI":"Yes; As MPI slave for data exchange with MPI masters (S7-300/S7-400 CPUs, OPs, TDs, Push Button Panels); S7-200-internal CPU/CPU communication is possible in the MPI network with restrictions; transmission rates: 19.2/187.5 kbit/s","PPI":"Yes; with PPI protocol for program functions, HMI functions (TD 200, OP), S7-200-internal CPU/CPU communication ; transmission rates 9.6/19.2/187.5 kbit/s","STL":"Yes","24 V":"Yes; permissible range: 15.4 to 28.8 V","Depth":"62 mm","Width":"90 mm","Height":"80 mm","Number":"256","24 V DC":"Yes","Physics":"RS 485","Present":"Yes; Program: Entire program maintenance-free on integral EEPROM, programmable via CPU; data: Entire DB 1 loaded from PG/PC maintenance-free on integral EEPROM, current values of DB 1 in RAM, retentive memory bits, timers, counters, etc. maintenance-free via high-performance capacitor; optional battery for long-term buffering","Adjustable":"Yes; via high-performance capacitor or battery","Command set":"Bit logic instructions, compare instructions, timer instructions, counter instructions, clock instructions, transmissions instructions, table instructions, logic instructions, shift and rotate instructions, conversion instructions, program control instructions, interrupt and communications instructions, logic stack instructions, integer maths, floating-point math instructions, numerical functions","Lower Limit":"1 ms","Upper Limit":"54 min; 4 timers: 1 ms to 30 s; 16 timers: 10 ms to 5 min; 236 timers: 100 ms to 54 min","For Uprating":"Yes","Number, max.":"32 byte","2-Wire Sensor":"Yes","For Signal \"0\"":"0 to 5 V","For Signal \"1\"":"min. 15 V","Interface type":"Integrated RS 485 interface","Shielded, Max.":"500 m","Operation, max.":"95 %; RH class 2 in accordance with IEC 1131-2","Operation, min.":"5 %","Parameterizable":"Yes; (E 0.0 to E 0.5) 30 kHz","Weight, approx.":"270 g","lifecycle_stage":"current","\"0\" To \"1\", Max.":"15 µs; of the standard outputs, max. (Q0.2 to Q0.3) 15 µs; of the pulse outputs, max. (Q0.0 to Q0.1) 2 µs","\"1\" To \"0\", Max.":"100 µs; of the standard outputs, max. (Q0.2 to Q0.3) 100 µs; of the pulse outputs, max. (Q0.0 to Q0.1) 10 µs","Power loss, typ.":"3 W","Rated value (DC)":"24 V","Unshielded, Max.":"150 m","Backup time, max.":"50 h; (min. 8 h at 40 °C); 200 days (typ.) with optional battery module","Source/sink input":"Yes; optionally, per group","Number of counters":"4; High-speed counters (30 kHz each), 32 bit (incl. sign), can be used as up/down counters or for connecting 2 incremental encoders with 2 pulse trains offset by 90° (max. 20 kHz (A/B counters)); parameterizable enable and reset input; interrupt facilities (incl. call of subroutine with any content) when the setpoint is reached; reversal in counting direction, etc.","On Lamp Load, Max.":"5 W","Program processing":"free cycle (OB 1), interrupt-controller, time-controlled (1 to 255 ms)","up to 40 °C, max.":"3 A","up to 55 °C, max.":"3 A","At \"0\" To \"1\", Max.":"12.8 ms","At \"0\" To \"1\", Min.":"0.2 ms","Between The Channels":"Yes; Optocoupler","For Signal \"1\", Min.":"20 V DC","For Signal \"1\", Typ.":"4 mA","Inrush current, max.":"10 A; at 28.8 V","Output current, max.":"180 mA","Program organization":"1 OB, 1 DB, 1 SDB subroutines with/without parameter transfer","Serial Data Exchange":"Yes; As freely programmable interface with interrupt facility for serial data exchange with third-party devices with ASCII protocol transfer rates: 1.2 / 2.4 / 4.8 / 9.6 / 19.2 / 38.4 / 57.6 / 115.2 kbps; the PC/PPI cable can also be used as RS 232/RS 485 converter","Integrated (For Data)":"2 kbyte","Plug-in I/O terminals":"No","Retentivity available":"Yes; M 0.0 to M 31.7","Number of alarm inputs":"4; 4 rising edges and/or 4 falling edges","Limit frequency (pulse)":"20 kHz","Number of pulse outputs":"2; High-speed outputs, 20 kHz, with interrupt option; pulse-width and frequency modulation option","Transmission rate, max.":"187.5 kbit/s","Transmission rate, min.":"19.2 kbit/s","For Bit Operations, Max.":"0.37 µs","Integrated (For Program)":"4 kbyte","Number of digital inputs":"6; Integrated","Short-circuit protection":"No; to be provided externally","Number of digital outputs":"4; Transistor","With Resistive Load, Max.":"0.75 A","Between Different Circuits":"500 V DC between 24 V DC and 5 V DC","For Signal \"1\" Rated Value":"750 mA","Number of subroutines, max.":"64","Vertical Installation, Max.":"45 °C","Vertical Installation, Min.":"0 °C","from supply voltage L+, max.":"900 mA; 80 to 900 mA","Horizontal Installation, Max.":"55 °C","Horizontal Installation, Min.":"0 °C","Permissible Range, Lower Limit":"860 hPa","Permissible Range, Upper Limit":"1 080 hPa","Number of analog potentiometers":"1; Analog potentiometer; resolution 8 bit","Of Which Retentive With Battery":"0 to 255, via high-performance capacitor or battery, adjustable","Counting frequency (counter) max.":"30 kHz","Between The Channels, In Groups Of":"4","Of Which Retentive Without Battery":"0 to 112 in EEPROM, adjustable","Number of memory modules (optional)":"1; pluggable memory module, content identical with integral EEPROM","connectable programming devices/PCs":"SIMATIC PG/PC, standard PC","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","For Signal \"0\" Residual Current, Max.":"0.1 mA","Limitation of inductive shutdown voltage to":"1 W","User program protection/password protection":"Yes; 3-stage password protection","Of The Pulse Outputs, With Resistive Load, Max.":"20 kHz; Q0.0 to Q0.1","Permissible Quiescent Current (2-Wire Sensor), Max.":"1 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$90.30","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=404557&mlfb=6ES7211-0AA22-0XB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7211-0AA22-0XB0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7211-0AA22-0XB0","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/6ES7211-0AA22-0XB0 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}}