X20 Compact-S controllers are 37.5 mm wide and available in five variants. As standard, they are equipped with USB, Powerlink and Gigabit Ethernet interfaces and are fully compatible with all other X20 controllers. The most powerful version achieves cycle times down to 400 µs. If this performance is not needed, a variant with a maximum cycle time of 800 µs or 1 ms also is available. For machines that do not require a real-time network, the two smallest variants can be used. They have Fast Ethernet and can achieve cycle times as low as 2 or 4 ms.