The Edge switch range of products are 6 port switches with 0, 1 or 2 fibre ports - all copper ports are 10/100Mbps auto-detecting and auto-negotiating RJ45 ports. They are backed back by an impressive selection of industrial approvals and retail at an extremely competitive list price.
They can form redundant rings by using them in conjunction with 6K series Industrial Ethernet switches (acting as the ring master) or can be used in Spanning Tree or Rapid Spanning Tree environments thanks to their Link-Loss-Learn capability.

See datasheet for the product types available or see the IPS42 datasheet for mains / high voltage powering options.