Overview
The 6ES7216-2AD00-0XB0 is a Siemens SIMATIC S7-200 CPU 216 compact unit, a discontinued PLC processor with 24 DC inputs and 16 DC outputs, two PPI/freeport serial ports, and a 28 V DC supply. It offers 4K program memory and 2.5K data memory, packaged in an 80 x 216 x 66 mm housing weighing 220 g.
Function & operation
As a compact unit, the CPU 216 integrates the processor, power supply, and I/O in one enclosure — no separate backplane or I/O rack needed. The 24 DC inputs and 16 DC outputs handle discrete machine signals directly; the 0.5 A per-output switching current suits solenoid valves, contactor coils, and indicator lamps within a control cabinet. Two PPI/freeport ports allow connection to programming devices, HMIs, or Modbus RTU slaves via the freeport protocol.
Applications
The S7-200 CPU 216 was deployed in small to medium machine control — packaging lines, conveyor systems, pump stations, and standalone OEM equipment where a compact, self-contained PLC with a moderate I/O count was sufficient. Its two serial ports made it suitable for applications requiring both a programming/HMI connection and a field-device link.