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27 October 2026

Siemens LOGO!: What is it and what is it used for?

Siemens LOGO!: What is it and what is it used for?

Siemens LOGO! – Compact programmable logic module for automation


The Siemens LOGO! is a compact PLC / programmable logic module designed for simple automation tasks such as lighting control, pumps, ventilation systems, motors, doors, timers and small industrial processes.


It can replace several control relays, timers and switching devices with a single programmable unit.


Compact control for small automation tasks


Discover compact and space-saving control solutions for small automation systems, from machine applications to building control and automation.


The Siemens LOGO! range includes:


Basic modules: Central controllers for simple automation tasks.


Expansion modules: Flexible LOGO! expansion with additional digital or analogue inputs and outputs.


Communication modules: Ethernet-compatible communication for connecting LOGO! to networks and automation systems while maintaining flexible I/O capacity.


Operator devices: Display and control interfaces for messages, alarms, status monitoring and parameter adjustment.


Power and inrush current limitation: Efficient and safe energy management to protect equipment against high inrush currents.


Software: Software for configuring, simulating and implementing automation logic.


Easy programming


LOGO! can be programmed directly using the buttons and integrated display, or more visually on a computer with LOGO! Soft Comfort software.


Advantages of Siemens LOGO!


More performance and capacity for applications — increased performance and I/O flexibility to support growing automation requirements.


Modern operation and visualisation — clear status information, fast diagnostics and intuitive operation directly on the device.


Efficient and flexible engineering — unified configuration for faster project implementation and easier collaboration between teams.


Integrated security and sustainability — built-in protection for safe and reliable operation, with easy-to-deploy updates.

Author

Miguel Cabrita

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