The 6GT2300-0AA00 is a part of the Simatic S7-300 series of programmable logic controllers (PLCs) manufactured by Siemens. The 6GT2300-0AA00 is a Digital Input Module that can be used to connect digital devices, such as push buttons, limit switches and sensors, to the PLC. It has 24 digital input channels that can be individually configured in software as either normally-open or normally-closed contact, allowing for a wide range of applications. The 6GT2300-0AA00 also has a built-in signal filtering that prevents short-term contact bounce, saving time and money in programming. The module is rated for use in areas with a temperature range of 0 to 55 degrees Celcius.