The switches themselves can be operated in zone 2, while their fast 100 Mbit/s optical ports connect field devices such as the Ethernet-enabled R. STAHL IS1+ remote I/O system in zone 1.
Depending on requirements, switch types are available for the connection of multi-mode lines that are up to 5 km long, or single-mode fibres up to 30 km long. There is also a mixed solution: one switch type provides one single-mode port to bridge a great distance, while three other devices can be locally connected more cost-efficiently via multi-mode cables. In addition, two electric TX ports with RJ45 jacks are available for connections in non-hazardous areas.
The unmanaged switch type 9721/13-42-x4 can withstand ambient temperatures in a wide range from -30 °C to +70 °C and tolerate the otherwise harsh conditions associated with such extremes. Redundant connection of 24 VDC auxiliary power supply is possible to increase the availability. In addition to IS1+ using Industrial Ethernet protocols such as PROFINET, EtherNet/IP or Modbus TCP, the switches are suitable for HMI devices from R. STAHL HMI Systems and IP cameras from R. STAHL Camera Systems, and obviously also for a diverse range of other field devices requiring type "op is" explosion-protected Ethernet connectivity via optical fibres.
• Stahl products are marketed in Ireland through Douglas Controls & Automation.
#Stahl #Hazardous #Safety #PAuto