The Siemens PLC S7-1200 is designed to be compact, modular, and easy to install in any control panel. Its size varies slightly depending on the CPU model and I/O configuration, but in general, the dimensions range between 90 mm to 100 mm in height, 110 mm to 125 mm in width, and 75 mm in depth. This small size makes it ideal for machines or systems where space is limited. Despite its compact structure, the Siemens S7-1200 offers high processing power, integrated communication ports, and flexible expansion options. The entire design focuses on saving panel space without compromising performance, which is why many automation engineers prefer this PLC for small to medium-scale applications.
Every Siemens S7-1200 CPU includes built-in digital and analog I/Os, and users can expand them with additional signal modules, communication modules, and signal boards. This modular design helps you scale your system easily without changing the main controller. For example, the Siemens 6ES7223-1BH32-0XB0 digital input/output module fits perfectly with the S7-1200 PLC and maintains a compact footprint. The small size combined with high efficiency allows engineers to install multiple PLCs inside a single cabinet while maintaining proper ventilation and wiring space. Whether used for packaging machines, conveyor systems, or process automation, the Siemens S7-1200 PLC ensures powerful control in a small, practical housing—making it one of the most space-efficient and flexible PLCs in its class.