The S7-200 CPU combines a central processing unit (CPU), power supply, and discrete I/O points into a compact, stand-alone device.
The CPU executes the program and stores the data for controlling the automation task or process.
Additional I/O points can be added to the CPU with expansion modules up to the physical size limits listed
The power supply provides electrical power for the base unit and for any expansion module that is connected.
The inputs and outputs are the system control points: the inputs monitor the signals from the field devices (such as sensors and switches), and the outputs control pumps, motors, or other devices in your process.
The communications port allows you to connect the CPU to a programming device or to other devices.
Status lights provide visual information about the CPU mode (RUN or STOP), the current state of the local I/O, and whether a system fault has been detected.
Some CPUs provide a real-time clock as a built-in feature, while other CPUs require the real-time clock cartridge.
A plug-in serial EEPROM cartridge provides a means to store CPU programs and transfer programs from one CPU to another.
A plug-in battery cartridge provides extended retention of data memory in RAM.
The S7-200 has been proven worldwide in applications covering all sectors as a result of its wide range of exceptional features:
Compact CPU for simple automation tasks – The best compact device if you want to change to an effective solution that performs simple automation tasks very economically. Also available with an extended temperature range
Expandable compact CPU for more complex tasks – The capable, compact package for more complex machines and small system solutions
CPU for higher communication and computing requirements – The high-performance CPU for complex tasks that require speed and special communication capabilities
CPU 224 XP
CPU for simple drive tasks – The CPU 224 version for convenient implementation of simple drive tasks – with two interfaces, two analog inputs and one analog output, as well as two 100-kHz pulse outputs and two high-speed 200-kHz counters
High-performance CPU for larger technical tasks – The versatile high-performance CPU for complex automation tasks with expanded inputs and outputs as well as two RS485 interfaces