The 9721 unmanaged switch is used to link electrical Ethernet networks (TX) and networks based on fibre optic cables (FX). The fibre optic cables are designed for operation in hazardous areas of Zones 0, 1, 2, 20, 21 and 22 with the "Ex op is" type of protection (IEC/EN 60079-28). Therefore, conventional fibre optic cables can also be used in hazardous areas and may be connected and disconnected during operation (i.e. hot swap).The unmanaged switch has 2 TX ports and 4 FX op is ports. A redundant power supply can be provided. Compatible with: R. STAHL IS1+ Remote I/O, HMI and IP cameras
