Belden-Hirschmann MACH 104 Family Managed Switch certified for use with ABB 800xA DCS - Industrial IT certified Managed Switches for use with ABB 800xA DCS (Certified Hardware for System 800xA (backup))
Source Hirschmann MACH104-20TX-FR Managed 24-port Full Gigabit 19" Switch, redundant PSU on m.alibaba.com
MACH104-20TX-FR Hirschmann Switch MACH104-20TX-FR Brand New By DHL Fast Shipping | eBay