Siemens's Industry Automation Division has added a new compact 40 ampere basic unit to its Sitop modular power supply series. It is only 150 millimeters wide, which is 90 millimeters narrower than the previous unit. The 20 ampere power supply has also been renewed and is only 70 millimeters wide. The two Sitop PSU300M standard mounting rail power supplies for connection to 3-phase 400-500 volt AC networks now have a wider range input (from 320 to 575 volt AC) than previous versions.