Siemens 6ES7214-1AC01-0XB0 CPU 214 PLC

Reliable Compact Controller for Small Automation Tasks

This compact CPU unit delivers robust control capabilities for small-scale automation applications. It combines processing power, I/O, and communication in a single housing. Many machine builders choose this controller for simple to medium complexity tasks. The unit offers excellent value for cost-sensitive projects without sacrificing performance.

Technical Specifications

Parameter	Specification
Model	6ES7214-1AC01-0XB0
Dimensions	120 mm × 80 mm × 62 mm (W × H × D)
Weight	0.35 kg
Power Supply	24 V DC
Power Consumption	8 W typical
Program Memory	4 KB (1,200 instructions)
Data Memory	2 KB
Digital Inputs	8 × 24 V DC (sink/source)
Digital Outputs	6 × 24 V DC, 0.75 A (transistor)
Onboard I/O Count	14 (8 inputs, 6 outputs)
Max I/O Expansion	38 (using expansion modules)
Built-in Communication	1 × RS-485 (PPI, MPI, freeport)
Bit Instruction Speed	0.37 µs
Word Instruction Speed	8 µs
Real-Time Clock	Yes (battery-backed)
Timer/Counter	128 timers, 128 counters
Interrupts	14 hardware, 2 software
Operating Temperature	0°C to +55°C
Storage Temperature	-40°C to +70°C
Humidity Range	5% to 95% RH (non-condensing)
Protection Class	IP20
Certifications	CE, UL, cULus

Integrated I/O and Onboard Features

This unit includes 8 digital inputs and 6 transistor outputs on board. The inputs accept 24 V DC signals from sensors and pushbuttons. Transistor outputs drive small solenoids, relays, and indicator lamps directly. This built-in I/O reduces the need for additional expansion modules.

Processing Performance and Execution Speed

The CPU executes bit instructions in just 0.37 microseconds. Word instructions complete in 8 microseconds for efficient data processing. This speed suits applications requiring fast scan times and deterministic response. The controller handles up to 1,200 instructions in its program memory.

Memory Architecture and Storage Capacity

Program memory accommodates 4 KB or approximately 1,200 instructions. Data memory provides 2 KB for variables and system data. The battery-backed real-time clock maintains time and date during power loss. This retention prevents time stamp loss during temporary outages.

Communication Capabilities and Networking

A built-in RS-485 port supports PPI, MPI, and freeport protocols. This port connects to programming devices, HMIs, and other S7-200 controllers. Users can implement custom communication with ASCII-based devices. The port operates up to 187.5 kbps for fast data exchange.

Expansion Capabilities and System Scalability

The CPU supports expansion with additional I/O modules up to 38 points. Users can add digital and analog modules as applications grow. This scalability protects initial investments while allowing future expansion. The modular design adapts to changing automation requirements.

Interrupt Functions and Real-Time Response

Fourteen hardware interrupts handle high-priority events immediately. Two software interrupts support periodic tasks and time-of-day scheduling. Interrupt routines execute independently of the main scan cycle. This architecture ensures fast response to critical field signals.

Mechanical Construction and Physical Specifications

This controller measures 120 mm wide and weighs only 0.35 kg. The compact footprint saves space in small control panels. IP20 protection suits installation inside enclosures and cabinets. Standard DIN rail mounting simplifies installation and replacement.

Safety Certifications and Approvals

The 6ES7214-1AC01-0XB0 holds CE, UL, and cULus certifications for global use. These approvals confirm compliance with international safety standards. Each unit undergoes quality testing before shipment. This commitment ensures reliable operation in industrial environments.