Hirschmann 943434014 RS20-0400S2S2SDAP Managed Switch with 2 RJ45 Fast Copper ports and 2 Fiberoptic Single mode SC port (2 fiber ports are uplink ports). Operating Voltage of 9.6-60 VDC & 18-30 VAC. Software Layer 2 Professional and fanless design with Professional management. DIN rail mount. Operating Temperature of 32F-140F. Approvals CE, cUL508, ISA12.12.01, Class 1 Div 2.

The price for a single switch, although I have two available. Both units are open, without boxes, but never utilised for the final usage.