Siemens 6ES7211-0AA23-0XB0 CPU 221 Compact Unit

Series#: Siemens

Product Details

6ES7211-0AA23-0XB0 – SIEMENS SIMATIC S7-200 CPU 221 Compact Unit, designed for space-saving automation.
Integrated 6 digital inputs and 4 digital outputs (24V DC) for small-scale control tasks.
Compact design with built-in power supply and RS-485 communication port (PPI/MPI).
Expandable via optional memory cartridge and battery backup for reliable operation.
Fast execution with 0.22 μs per Boolean instruction – ideal for high-speed logic.
Wide operating temperature range (-25°C to +70°C) for harsh industrial environments.

Specification

The SIEMENS SIMATIC S7-200 CPU 221, model 6ES7211-0AA23-0XB0, is a compact, high-performance programmable logic controller tailored for small-scale automation applications. This unit integrates a powerful CPU with 6 digital inputs and 4 digital outputs, all operating at 24V DC, making it a perfect fit for standalone control tasks in packaging, material handling, or machine tool industries. It features a built-in RS-485 interface supporting PPI and MPI protocols, enabling seamless integration with HMI panels or other S7-200 modules. With a program memory of 4 KB and data memory of 2 KB, it handles up to 128 digital I/O expansion points. The CPU 221 operates on a 24V DC power supply and includes a real-time clock and EEPROM for data retention. Its robust design ensures reliable performance in temperatures from -25°C to +70°C, with vibration and shock resistance per IEC 61131-2 standards.

Parameter	Specification
Product Type	SIMATIC S7-200 CPU 221 Compact Unit
Model Number	6ES7211-0AA23-0XB0
Power Supply Voltage	24V DC (20.4 to 28.8V DC)
Number of Digital Inputs	6 (24V DC, sink/source)
Number of Digital Outputs	4 (24V DC, transistor, 0.75A each)
Total I/O Points	10 (6 inputs + 4 outputs)
Program Memory	4 KB (user program)
Data Memory	2 KB (retentive)
Execution Speed (Boolean)	0.22 μs per instruction
Communication Interface	1x RS-485 (PPI/MPI, up to 187.5 kbit/s)
Expansion Capability	None (fixed I/O, no expansion modules)
Memory Options	Optional memory cartridge (256 KB) and battery backup
Real-Time Clock	Integrated, with backup via capacitor (7 days typical)
Operating Temperature	-25°C to +70°C
Storage Temperature	-40°C to +85°C
Relative Humidity	5% to 95% (non-condensing)
Vibration Resistance	10 to 57 Hz, 0.075 mm amplitude; 57 to 150 Hz, 1 g
Shock Resistance	15 g peak, 11 ms duration (half-sine)
Protection Class	IP20 (enclosure)
Dimensions (W x H x D)	80 mm x 80 mm x 62 mm
Weight	Approx. 0.3 kg
Certifications	CE, UL, CSA, FM, cULus