Examples of applications
3.12 Process automation in hazardous areas
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
125
3.12 Process automation in hazardous areas
Task
The aim was to allow mobile access to the process data of the entire plant in a hazardous
area (production of polyoxymethylene thermoplastic). Extremely complicated constraints had
to be taken into account when interfacing to the existing PCS 7 plant. The wireless network
had to work in an industrial building made of reinforced concrete with unspecified fittings
over seven floors. Added to this, were the chemical load and the high temperature
differences resulting from the production process.
Solution
All SIMATIC S7-1500 and SIMATIC S7-1200 controllers â‘¡ involved in the production
process are connected to the SIMATIC PCS 7 server
â‘ via Industrial Ethernet.
A SCALANCE XP208
â‘¢ controls data traffic with the access points.
In the hazardous area, several SCALANCE W786 access points with integrated antennas
â‘£
ensure stable coverage of the RF field. This device type was selected because it meets all
the requirements reliably: The degree of protection IP65 in conjunction with an extended
temperature range of -40 to +60 °C and the high mechanical stability providing resistance to
vibration and shock ensure high availability of the entire system.
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