{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7212-1HE40-0XB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7212-1HE40-0XB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7212-1HE40-0XB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7212-1HE40-0XB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1200 CPU 1212C, 6ES7212-1HE40-0XB0, 24 V DC, 2 Mbyte integrated memory, OPC UA server, MODBUS TCP, -40 to 70 °C, cULus CE.","salesMarkdown":"## What this CPU is and where it runs The Siemens 6ES7212-1HE40-0XB0 is a compact S7-1200 CPU 1212C that sits in a control cabinet running machine or process logic. Power comes from a 24 V DC supply with an isolated bus; the datasheet says the supply rail can droop to L+ minus 4 V DC before the CPU drops out, which gives you a little headroom on a long cable run or a weak power supply. Integrated memory is 2 Mbyte — enough for medium-sized logic and data logging. The onboard Ethernet supports TCP/IP, MODBUS TCP, and an OPC UA server right out of the box, so you can pull variables into a SCADA or MES system without an extra gateway. The temperature range matters most if you're installing in a cabinet that sees seasonal swings or near hot rotating equipment. The -40 °C floor means it handles cold starts; the 70 °C ceiling is typical for a sealed panel in summer. No derating guesswork — those numbers are the operating limits, not storage. Supply voltage is straight 24 V DC, not AC, so you'll need a proper DC bus or power supply. The 'L+ minus 4 V DC minimum' tells you the CPU still holds its logic down to about 20 V — useful if you have a long 24 V run with voltage drop. The I²t rating of 0.8 A²·s is a short-circuit withstand number for the internal electronics; it's more of a coordination value for the panel designer sizing the branch circuit protection. For the rest of us, it means the CPU is robust enough for typical industrial supply shorts. ## Connections and protocols The built-in PROFINET interface supports LLDP and SNMP for network management — useful if the plant network team wants to discover devices. It does not support IRT, MRP, or MRPD, so this CPU is not for isochronous motion or redundant ring topologies. For standard machine networking, it's fine. OPC UA comes as a server; you can configure up to 10 OPC UA connections and expose inputs, outputs, memory bits, DBs, distributed I/Os, timers, and counters to a client. That's a lot of tag visibility without buying a separate module. PROFIBUS requires an external CM 1243-5 (master) or CM 1242-5 (slave) module. MODBUS TCP and UDP are native, no extra hardware. Forcing variables is supported, which helps commissioning. The CPU also hosts a web server with up to 30 connections — handy for remote diagnostics without a SCADA client. This CPU carries both cULus and CE markings, so it meets North American and European safety and EMC requirements. For an independent trader or a BOM freeze, that means the declaration of conformity and UL listing documents are available — no special approvals needed for standard industrial use.","metaTitle":"Siemens 6ES7212-1HE40-0XB0 CPU 1212C, 24 V DC, OPC UA","metaDescription":"Siemens S7-1200 compact CPU 1212C, 24 V DC supply, isolated, -40 to 70 °C, 2 Mbyte memory, OPC UA server, MODBUS TCP, cULus/CE. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"DCP":"Yes","FBD":"Yes","I2t":"0.8 A²·s","IRT":"No","LAD":"Yes","MRP":"No","SCL":"Yes","UDP":"Yes","24 V":"L+ minus 4 V DC min.","DHCP":"No","LLDP":"Yes","MRPD":"No","Max.":"70 °C","Min.":"-40 °C","SNMP":"Yes","Depth":"75 mm","Width":"90 mm","cULus":"Yes","title":"6ES7212-1HE40-0XB0","Height":"100 mm","MODBUS":"Yes","OPC UA":"Yes; OPC UA Server","TCP/IP":"Yes","24 V DC":"Yes","CE mark":"Yes","Forcing":"Yes","Overall":"PG Connections: 4 reserved / 4 max; HMI Connections: 12 reserved / 18 max; S7 Connections: 8 reserved / 14 max; Open User Connections: 8 reserved / 14 max; Web Connections: 2 reserved / 30 max; OPC UA Connections: 0 reserved / 10 max; Total Connections: 34 reserved / 64 max","Present":"Yes","Voltage":"Yes","Isolated":"Yes","PROFIBUS":"Yes; CM 1243-5 (master) or CM 1242-5 (slave) required","As Client":"Yes","As Server":"Yes","ERROR LED":"Yes","MAINT LED":"Yes","PROFIsafe":"No","Supported":"Yes","Variables":"Inputs/outputs, memory bits, DBs, distributed I/Os, timers, counters","0 to +10 V":"Yes","Adjustable":"Yes","Integrated":"2 Mbyte","S7 routing":"Yes","Size, max.":"4 kbyte; Size of bit memory address area","Web server":"Yes","Backup time":"480 h; Typical","FM approval":"Yes","KC approval":"Yes","PROFIenergy":"Yes","UL approval":"Yes","description":"SIMATIC S7-1200, CPU 1212C, compact CPU, DC/DC/relay, onboard I/O: 8 DI 24 V DC; 6 DO relay 2 A; 2 AI 0-10 V DC, Power supply: DC 20.4-28.8V DC, Program/data memory 75 KB","AS-Interface":"Yes; CM 1243-2 required","Autocrossing":"Yes","Number, max.":"Limited only by RAM for code","RUN/STOP LED":"Yes","2-Wire Sensor":"Yes","OPC UA Server":"Yes; data access (read, write, subscribe), method call, runtime license required","Shared device":"Yes","Updating time":"The minimum value of the update time also depends on the communication component set for PROFINET IO, on the number of IO devices and the quantity of configured user data.","For Signal \"0\"":"5 V DC at 1 mA","For Signal \"1\"":"15 V DC at 2.5 mA","Interface type":"PROFINET","PID controller":"Yes","Shielded, Max.":"100 m; twisted and shielded","Autonegotiation":"Yes","Copy protection":"Yes","Marine approval":"Yes","Number of ports":"1","Operation, max.":"95 %; no condensation","Operation, min.":"795 hPa","Parameterizable":"Single phase: 3 @ 100 kHz & 3 @ 30 kHz, differential: 3 @ 80 kHz & 3 @ 30 kHz","Weight, approx.":"385 g","Without Battery":"Yes","lifecycle_stage":"current","\"0\" To \"1\", Max.":"10 ms; max.","\"1\" To \"0\", Max.":"10 ms; max.","Block protection":"Yes","Firmware version":"V4.5","Isochronous mode":"No","Maintenance-Free":"Yes","Media redundancy":"No","Power loss, typ.":"9 W","RJ 45 (Ethernet)":"Yes","Rated value (DC)":"24 V","Unshielded, Max.":"150 m","Data length, max.":"1 472 byte","Fall height, max.":"0.3 m; five times, in product package","Integrated Switch":"No","Source/sink input":"Yes","Inputs, adjustable":"1 kbyte","Number of counters":"6","On Lamp Load, Max.":"30 W with DC, 200 W with AC","PROFINET IO Device":"Yes","up to 40 °C, max.":"8","At \"0\" To \"1\", Max.":"12.8 ms","At \"0\" To \"1\", Min.":"0.2 ms","Outputs, adjustable":"1 kbyte","PG/OP communication":"Yes; encryption with TLS V1.3 pre-selected","Prioritized startup":"Yes","Programming package":"STEP 7 V17 or higher","User authentication":"\"anonymous\" or by user name & password","Between The Channels":"No","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"12 A; at 28.8 V","Frequency measurement":"Yes","Open IE communication":"Yes; Optionally also encrypted","RCM (formerly C-TICK)":"Yes","SIMATIC communication":"Yes","User-defined websites":"Yes","Controlled Positioning":"Yes","Number of alarm inputs":"4","Of Which In Line, Max.":"16","PROFINET IO Controller":"Yes","Deviation per day, max.":"±60 s/month at 25 °C","IP degree of protection":"IP20","Number of analog inputs":"2","Number of relay outputs":"6","Sampling interval, min.":"100 ms","Status/control variable":"Yes","Storage/transport, max.":"1 080 hPa","Storage/transport, min.":"660 hPa","Transmission rate, max.":"100 Mbit/s","User data per job, max.":"See online help (S7 communication, user data size)","Counting frequency, max.":"100 kHz","For Bit Operations, Typ.":"0.08 µs; / instruction","Number of analog outputs":"0","Number of blocks (total)":"DBs, FCs, FBs, counters and timers. The maximum number of addressable blocks ranges from 1 to 65535. There is no restriction, the entire working memory can be used","Number of digital inputs":"8; Integrated","Number of sessions, max.":"10","Per Priority Class, Max.":"16 kbyte; Priority class 1 (program cycle): 16 KB, priority class 2 to 26: 6 KB","Runtime license required":"Yes; \"Basic\" license required","Current consumption, max.":"1 200 mA; CPU with all expansion modules","For Word Operations, Typ.":"1.7 µs; / instruction","Number of digital outputs":"6; Relays","Publishing interval, min.":"200 ms","With Resistive Load, Max.":"2 A","Application authentication":"Available security policies: None, Basic128Rsa15, Basic256Rsa15, Basic256Sha256","Hardware clock (real-time)":"Yes","Installation altitude, max.":"5 000 m; Restrictions for installation altitudes > 2 000 m, see manual","Installation altitude, min.":"-1 000 m","Memory size per trace, max.":"512 kbyte","Reverse polarity protection":"Yes","Vertical Installation, Max.":"50 °C","Vertical Installation, Min.":"-20 °C","Input resistance (0 to 10 V)":"≥100k ohms","Conversion time (per channel)":"625 µs","Horizontal Installation, Max.":"60 °C","Horizontal Installation, Min.":"-20 °C","Number of configurable Traces":"2","Test voltage at air discharge":"8 kV","Number of server methods, max.":"20","Number of operating cycles, max.":"mechanically 10 million, at rated load voltage 100 000","for backplane bus (5 V DC), max.":"1 000 mA; Max. 5 V DC for SM and CM","Current consumption (rated value)":"400 mA; CPU only","Integration time, parameterizable":"Yes","Number of server interfaces, max.":"2","Supports protocol for PROFINET IO":"Yes","Test voltage at contact discharge":"6 kV","Between The Channels, In Groups Of":"2","Number of modules per system, max.":"3 comm. modules, 1 signal board, 2 signal modules","Protection level: Write protection":"Yes","tested according to IEC 60068-2-27":"Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms","For Floating Point Arithmetic, Typ.":"2.3 µs; / instruction","Plug-in (SIMATIC Memory Card), max.":"with SIMATIC memory card","Potential separation digital inputs":"500V AC for 1 minute","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","Potential separation digital outputs":"Relays","SO2 at RH < 60% without condensation":"S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free","Activation/deactivation of IO Devices":"Yes","Protection level: Complete protection":"Yes","Number of connectable IO Devices, max.":"16","Protection level: Read/write protection":"Yes","Automatic Detection Of Transmission Rate":"Yes","Number of subscriptions per session, max.":"5","Limit class A, for use in industrial areas":"Yes; Group 1","Limit class B, for use in residential areas":"Yes; When appropriate measures are used to ensure compliance with the limits for Class B according to EN 55011","Number of monitored items, recommended max.":"1 000","User program protection/password protection":"Yes","Operation, tested according to IEC 60068-2-6":"Yes","Number of connectable IO Devices for RT, max.":"16","Protection Of Confidential Configuration Data":"Yes","Number of IO Controllers with shared device, max.":"2","Of Which Inputs Usable For Technological Functions":"6; HSC (High Speed Counting)","Number of IO devices with prioritized startup, max.":"16","Number of position-controlled positioning axes, max.":"8","Resolution with overrange (bit including sign), max.":"10 bit","Number of nodes for user-defined server interfaces, max.":"2 000","Number of positioning axes via pulse-direction interface":"Up to 4 with SB 1222","Retentive data area (incl. timers, counters, flags), max.":"14 kbyte","Number of IO Devices that can be simultaneously activated/deactivated, max.":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$186.69 – $414.73","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/555ad9840ea6a8142da5b09497f2f49a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=229817&mlfb=6ES7212-1HE40-0XB0"},"ai":{"faq":[{"question":"What is DCP on this CPU?","answer":"DCP (Dynamic Configuration Protocol) is supported on the PROFINET interface, allowing automatic IP address assignment during first startup — no DIP switches or manual configuration needed."},{"question":"What compliance documentation does it have?","answer":"The CPU is cULus listed and CE marked, covering safety and EMC directives for North America and Europe."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7212-1HE40-0XB0","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/6ES7212-1HE40-0XB0 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}}