6ES7214-1AG40-0XB0 is the compact processore 1214C belonging to Siemens SIMATIC S7-1200 series with DC/DC/DC specification (24Alimentazione Vcc / 24Ingresso digitale Vcc / uscita CC a transistor). Si tratta di una CPU di fascia media con un eccezionale rapporto costo-prestazioni nella linea di prodotti S7-1200. Integrato con I/O digitali nativi e ingressi analogici, it supports PROFINET communication and modular expansion. Featuring logic control, PID regulation, motion control and data processing functions, it is widely deployed in medium & small automated equipment and standalone machine control systems.
Bit-by-bit Model Code Decoding (Siemens MLFB Naming Specification)
Definitions of each segment of order number `6ES7 214-1AG40-0XB0` are listed below:
| Segmento di codice | Definizione | Spiegazione dettagliata |
| 6ES7 | Product Series Prefix | Official identifier for Siemens SIMATIC S7 automation products |
| 214 | Linea di prodotti & Tipo di modulo | 1prima cifra 2 = S7-1200 product line; 2seconda cifra 1 = CPU module; 3rd digit 4 = Performance class of 1214C |
| 1AG40 | Hardware Specification & Versione | 1 = Standard CPU; A = DC/DC/DC power & I/O type; G4 = 4th-generation hardware, compatible with V4.x firmware; 0 = Standard base configuration |
| 0XB0 | Delivery Version | Standard mass-production version without customized functions or special packaging |
Specifiche tecniche principali
- Alimentazione elettrica & Specifiche elettriche
| Articolo | Valore delle specifiche |
| Rated Supply Voltage | DC 20.4V ~ 28.8V (Nominal 24V DC) |
| Corrente di ingresso nominale | 350mA (Under nominal 24V DC) |
| Corrente di spunto | Massimo. 10UN |
| Power-off Hold Time | Typical 10ms |
| Internal Sensor Power Output | 24V DC output, massimo. 300mA, directly supplies field sensors |
- Core CPU Performance
| Articolo | Valore delle specifiche |
| Boolean Instruction Execution Time | Typical 0.08s per instruction |
| Word Arithmetic Instruction Execution Time | Typical 1.7s per instruction |
| Working Memory (Program + Data) | 150 KB |
| Built-in Load Memory | 4 MB non-volatile memory |
| Expandable Load Memory | Supports SIMATIC SD card, fino a 32 GB |
| Bit Memory (M Memory Area) | 8192 Byte |
| Temporizzatori / Contatori | 256 each |
| Maximum Quantity of OB Blocks | 128 |
- Onboard Integrated I/O Specifications
Ingressi digitali (DI)
Quantità: 14 canali, 24A DC, sink/source bidirectional compatible
Input Delay: Parameter configurable, minimum 0.2ms
High-speed Counter: 6 channels supported, massimo. frequency 100kHz (monofase) / 80kHz (AB quadrature)
Uscite digitali (FARE)
Quantità: 10 canali, 24V DC transistor output (PNP sourcing type)
Rated Output Current per Channel: 0.5UN
High-speed Pulse: 4 channels of PTO/PWM output supported, massimo. frequency 100kHz for stepper/servo positioning control
- Capacità di comunicazione
Onboard Standard Interface: 1 RJ45 PROFINET Ethernet port, 10/100Mbps auto-adaptive, auto-crossover supported
Protocolli supportati: S7 Communication, PROFINET IO Controller/Device, ModBus TCP, TCP/IP, UDP, ISO-on-TCP
Expandable Communication: Extend RS232/RS485 serial ports via CM 1241 / CB 1241 moduli di comunicazione, supporto Modbus RTU, USS and free port protocols
Maximum Connection Count: 8 S7 connections + 8 open user communication connections
- Meccanico & Specifiche ambientali
| Articolo | Valore delle specifiche |
| Metodo di montaggio | Standard DIN 35mm rail mounting |
| Dimensione complessiva (L × A × P) | 110mm × 100mm × 75mm |
| Total Weight | ca. 320G |
| Operating Ambient Temperature | 0℃ ~ 55 ℃ (Horizontal mounting); 0℃ ~ 45℃ (Montaggio verticale) |
| Magazzinaggio / Transportation Temperature | -40℃ ~ +70 ℃ |
| Classe di protezione | IP20 |
| Permissible Relative Humidity | 5% ~ 95%, senza condensa |
Model Comparison of CPU 1214C Series
Full models with different power supply & output types under identical hardware grade:
| Full Order Number | Tipo di alimentazione | Tipo di ingresso | Tipo di uscita | Caratteristiche principali |
| 6ES7214-1AG40-0XB0 | 24A DC | 24A DC | Transistor (PNP) | DC/DC/DC, high-speed pulse output supported |
| 6ES7214-1BG40-0XB0 | 120/230V e | 24A DC | Relè | AC/DC/Relay, compatible with AC & Carichi CC |
| 6ES7214-1HG40-0XB0 | 24A DC | 24A DC | Relè | DC/DC/Relay, relay output with DC power supply |
Expansion Capability Description
- Signal Modules (SM): Fino a 8 digital/analog signal modules expandable; maximum expansion to 284 digital I/O points and 64 canali di ingresso analogici
- Signal Board (SB): 1 signal board supported for expanding minor I/O, serial port or battery board without occupying cabinet space
- Moduli di comunicazione (CM): Fino a 3 communication modules expandable, supporting RS232/RS485, PROFIBUS DP, ecc.
- Native Technical Functions: Supports up to 3-axis basic motion control (jog, homing, relative/absolute positioning) and 8-channel PID closed-loop control
Scenari applicativi tipici
- Standalone Machine Control: Logic and motion control for packaging machinery, attrezzature per la stampa, piccole macchine utensili, auxiliary units of injection molding machines, ecc.
- Material Conveying Systems: Logic control for roller conveyors, belt conveyors and sorting equipment
- Controllo del processo: Analog closed-loop regulation for small water treatment equipment, Sistemi HVAC, constant-pressure water supply units, ecc.
- Edificio & Municipal Engineering: Automation control for lighting systems, controllo degli accessi, small pump stations and environmental monitoring equipment
- Production Line Workstations: Independent workstation control for auto parts and electronic assembly lines, accessible to factory network via PROFINET
Common Fault Troubleshooting Matrix
| Fenomeno di guasto | Possibili cause | Ispezione & Soluzioni |
| Red SF indicator steady on, system fails to operate | 1. Hardware failure; 2. Fatal program error; 3. Mismatched module configuration | 1. Check PLC diagnostic buffer to locate specific fault code; 2. Clear program and download empty project for test; 3. Verify consistency between hardware configuration and actual module model |
| RUN indicator off, PLC stays in STOP mode all the time | 1. Mode switch set to STOP; 2. Missing startup OB block; 3. Unmet startup conditions | 1. Toggle mode switch to RUN position; 2. Add OB100 startup organization block; 3. Inspect power supply and tightness of terminal wiring |
| Ethernet communication connection failure | 1. IP address conflict or mismatched network segment; 2. Damaged Ethernet cable; 3. Intercettazione del firewall | 1. Verify IP addresses of PLC and HMI/host PC to ensure same network segment without conflict; 2. Replace Ethernet cable to test link integrity; 3. Disable PC firewall and irrelevant network adapters |
| No response of digital inputs | 1. Insufficient input voltage; 2. Incorrect common terminal wiring; 3. Mismatched input type | 1. Measure voltage at input terminals with multimeter to confirm ≥18V DC; 2. Check reliable wiring of M common terminal; 3. Align sink/source wiring with parameter configuration |
| No output from digital channels | 1. Program logic not activated; 2. No power supplied to output common terminal; 3. Channel burned out due to load short-circuit | 1. Monitor program online to confirm output status is ON; 2. Check normal 24V DC power supply on output side; 3. Power off and measure damaged output channel, switch to spare channel |
Core Application Fields of 6ES7214-1AG40-0XB0 (CPU 1214C DC/DC/DC)
As the most versatile mid-range compact CPU in S7-1200 series, this model features four core advantages: high-speed transistor outputs, onboard analog inputs, PROFINET networking and 3-axis basic motion control. It is mainly designed for standalone equipment and small-scale system control, widely adopted in discrete manufacturing as well as minor process control scenarios. Detailed classifications are as follows:
- General Standalone Machinery Manufacturing (Core Application Field)
This is the dominant application area of CPU 1214C. It satisfies most electrical control demands of single machines, with native I/O sufficient for whole-machine control without massive expansion.
- Macchine per l'imballaggio
Applicable to horizontal flow wrappers, vertical bag-making machines, macchine etichettatrici, capping machines, sealing machines and other equipment. Its onboard high-speed pulse outputs control film feeding and material feeding servo/stepper motors; PID function achieves precise sealing knife temperature control. PROFINET enables communication with upper production line systems, making it a standard electrical control solution for medium & small packaging equipment.
- Small Metal Processing Equipment
Suitable for CNC drill & tap machines, simple tube benders, stamping feeders, small cutting machines, tapping machines, ecc. It supports up to 3-axis point-to-point motion control and forms position closed-loop with high-speed counters, meeting positioning and logic control requirements of simple metal forming & processing machines.
- Plastica & Rubber Auxiliary Equipment
Matching mold temperature controllers, auto material loaders, refrigeratori, small extruders, vulcanizers for injection molding machines. Onboard analog inputs directly collect temperature and pressure signals; PID adjusts heating/cooling outputs, and data exchange with main injection molding machine via PROFINET is available.
- Cibo & Light Industrial Equipment
Applied to filling machines, baking production lines, dough mixers, sterilization equipment, ecc. It meets industrial-grade reliability standards for food industry, realizing closed-loop regulation of temperature & liquid level as well as logic control for conveying & ordinamento.
- Movimentazione dei materiali & Intelligent Logistics
- Trasmettere & Sorting Systems
For factory internal roller conveyors, trasportatori a nastro, small diverting sorters, lifting transfer machines, ecc. It controls start/stop and direction change of multiple motors, cooperates with photoelectric and proximity sensors to realize workpiece identification & diversion, supports multi-speed adjustment, and can connect to plant-wide logistics control system via PROFINET.
- Small Warehousing & Attrezzature di sollevamento
Applicable to reciprocating elevators, simple stackers, cargo lifts, vertical storage carousels, ecc. It fulfills point positioning, safety door interlock and fault alarm functions, fully covering motion control requirements within 3 assi, ideal for medium & small automated warehouses and cross-floor material transfer stations.
- AGV/AMR Docking Station
Used for local control of AGV docking platforms and material staging tables in logistics scenarios, completing material arrival detection, transfer mechanism control and signal interaction with AGVs with flexible networking capability.
III. Small Process Control & Public Utilities
Relying on onboard analog inputs and native PID functions, it realizes basic process control for small-scale analog closed-loop scenarios without extra expansion modules.
- Small Water Treatment & Environmental Protection Equipment
Suitable for reverse osmosis pure water equipment, chemical dosing units, reclaimed water reuse devices and small sewage treatment stations. It collects analog signals such as liquid level, pressure and PH value, and controls rotating speed of dosing pumps & booster pumps via PID to stabilize water quality and pipeline pressure.
- Constant-pressure Water Supply & Sistemi HVAC
For constant-pressure water supply systems of medium & small buildings, central air conditioning units and fresh air systems. Analog inputs collect pipeline pressure and air duct temperature; PID adjusts inverter output frequency to realize constant pressure & controllo costante della temperatura, serving as a mainstream control scheme for building public utilities.
- Industrial Temperature Control & Drying Equipment
Matching small industrial ovens, tempering furnaces, hot air dryers and mold temperature controllers. After expanding analog modules, it supports up to 8-channel PID closed-loop with temperature control accuracy satisfying most industrial heating applications.
- Automobile & Produzione di ricambi per auto
- Workstation Tooling & Special-purpose Machines
Applied to fixture clamps, error-proof systems, small tightening machines, marking machines and air tightness test equipment at auto part assembly stations. It implements logic control including workpiece clamping, detection judgment and process error prevention, and directly accesses workshop production line network via PROFINET to upload production data to MES system.
- Auxiliary Production Equipment
Matching peripheral equipment such as cleaning machines, oil coating machines and loading/unloading manipulators, featuring concise control logic and convenient inter-device networking.
- Elettronico & Testing Equipment
- Auxiliary Equipment for Electronic Assembly
For SMT line board loaders/unloaders, conveyor connection platforms, small wave soldering machines, conformal coating machines, ecc. It integrates conveying, positioning and temperature control into one unit with compact size for built-in installation inside equipment.
- Prova di funzionalità & Aging Equipment
Suitable for small product test benches, aging racks and component inspection equipment. It collects analog signals of voltage, attuale, ecc., automatically executes test procedures, and supports recording & uploading of test data.
- Edificio & Municipal Infrastructure
- Intelligent Building Automation Control
Deployed for group lighting control, ventilazione & smoke exhaust systems and water supply & drainage pump groups of public buildings. It supports timing logic, linkage control and fault alarm, and can connect to building BA system through communication modules.
- Small Municipal Pump Stations & Sluices
Matching community rainwater pump stations, sewage lifting pump stations and small water conservancy gates. It automatically starts/stops pumps based on liquid level, with overload and water shortage protection, and supports expansion of remote monitoring function.
Supplementary Compatibility Explanation
This model is DC/DC/DC transistor output type, especially suitable for equipment requiring high-speed pulse, stepper or servo control. For heavy-current mixed AC & DC load scenarios, relay output version (6ES7214-1HG40-0XB0) è raccomandato.
Restricted by 150KB working memory and 3-axis motion control capacity, it is positioned for standalone machines and small systems, not applicable to complex control scenarios such as large production lines and multi-axis linkage machining centers.
Translation Standard Notes
- Industrial electrical terminology complies with international IEC & Siemens official English specifications; numeri di modello, fault codes, parameter blocks and communication protocols retain original symbols without translation.
- Specialized abbreviations: PTO, PWM, PID, OB, MES, BA, AGV, AMR, SMT, MLFB fully adopted as universal industry shorthand.
- Tables and technical descriptions follow the format of Siemens official English manuals for overseas equipment documentation.
- Units (μs, kHz, KB, GB, mm, G, ℃, V, UN, OH) strictly follow international metric standards.
- Long Chinese compound sentences are split into concise technical English sentences to avoid ambiguity for foreign maintenance engineers.
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