Siemens 6ES7216-2BD22-0XB0 CPU 226

High-Density Integrated Controller for S7-200 Systems

The Siemens 6ES7216-2BD22-0XB0 serves as a powerful compact CPU within the SIMATIC S7-200 programmable controller family. This unit integrates 24 digital inputs and 16 digital outputs, eliminating the need for additional modules. Its compact housing measures 120 mm in height, 80 mm in width, and 62 mm in depth, fitting standard DIN-rail installations. The total weight reaches approximately 0.5 kg, making it a lightweight yet robust control solution.

This controller features 16 KB of program memory and 10 KB of data memory for moderate-sized applications. The following table details the complete technical specifications for this compact CPU:

Parameter	Specification
Product Brand	Siemens
Product Model	6ES7216-2BD22-0XB0
Product Category	CPU 226 Compact Unit
Platform Compatibility	SIMATIC S7-200
Digital Inputs	24 (24 V DC)
Digital Outputs	16 (24 V DC, 0.75 A)
Program Memory	16 KB
Data Memory	10 KB
Communication Ports	2 x RS-485 (PPI/MPI/Freeport)
Dimensions (H x W x D)	120 mm x 80 mm x 62 mm
Weight	0.5 kg
Supply Voltage	24 V DC
Power Consumption	12 W typical
Interrupt Inputs	4
High-Speed Counters	6 (30 kHz max)
Operating Temperature	0°C to +55°C
Storage Temperature	-40°C to +85°C

I/O Integration and Channel Architecture

The 6ES7216-2BD22-0XB0 includes 24 digital inputs and 16 digital outputs, providing comprehensive connectivity. Each output channel delivers 0.75 A for driving relays, solenoids, and indicator lamps. This integrated I/O design reduces system cost and saves cabinet space. Engineers can therefore deploy this CPU in applications where rack-based I/O is impractical.

Memory Architecture and Program Execution

16 KB of program memory stores logic, motion control, and communication routines efficiently. 10 KB of data memory holds variables, alarms, and system configurations securely. The processor supports high-speed counters up to 30 kHz for precise position and speed measurement. Users benefit from rapid execution even in applications requiring pulse measurement.

Communication and Network Integration

Two RS-485 ports support PPI, MPI, and Freeport protocols for flexible device connectivity. This dual-port design enables simultaneous connection to programming devices and HMIs. The ports also support networking with up to 126 stations on a single bus. Engineers can therefore build distributed systems using multiple S7-200 CPUs and operator panels.