The following standard CPUs of the SIPLUS S7-300 are available for use in extreme environmental conditions:

• SIPLUS S7-300 CPU 314
  for plants with additional requirements for the program scope and the instruction processing speed
• SIPLUS S7-300 CPU 315-2 DP
  for plants with medium to high requirements for the program scope and distributed configuration using PROFIBUS DP
• SIPLUS S7-300 CPU 315-2 PN/DP
  for plants with medium to high requirements for the program scope and distributed configuration using PROFIBUS DP and PROFINET IO; these can be implemented as distributed intelligence in Component Based Automation (CBA) on PROFINET
• SIPLUS S7-300 CPU 317-2 PN/DP
  for plants with high requirements for the program scope and distributed configuration using PROFIBUS DP and PROFINET IO; these can be implemented as distributed intelligence in Component Based Automation (CBA) on PROFINET

Standard CPUs of the SIPLUS S7-300 can be used in the following extreme environmental conditions:

• Extended ambient temperature range from -25 °C to +60/+70 °C
• Where increased resistance to chemical, mechanical and biological loading as well as salt spray is required
• Extended installation altitude
• Use up to 100% relative humidity
• Conformity with EN 50155