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

• SIPLUS S7-300 CPU 312C
  The compact CPU with integrated digital inputs/outputs and integrated counting function
• SIPLUS S7-300 CPU 313C
  The compact CPU with integral digital and analog inputs/outputs
• SIPLUS S7-300 CPU 313-2 DP
  The compact CPU with integrated digital inputs/outputs PROFIBUS DP interface and integrated counting function
• SIPLUS S7-300 CPU 314C-2 PtP
  The compact CPU with integrated digital and analog inputs/outputs, second serial port and integrated counting and positioning functions
• SIPLUS S7-300 CPU 314C-2 DP
  The compact CPU with integrated digital and analog inputs/outputs, PROFIBUS DP port and integrated counting and positioning functions
• SIPLUS S7-300 CPU 314C-2 PN/DP
  the compact CPU with integrated digital and analog inputs/outputs and integrated counting and positioning functions; with the option of a distributed topology via PROFIBUS DP and PROFINET IO; can be implemented as distributed intelligence in Component Based Automation (CBA) on PROFINET

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

• Wide range of ambient temperatures from -25 °C to +60/+70 °C
• Where increased resistance to chemical, mechanical and biological loading as well as salt spray is required
• Higher installation altitudes
• In relative humidity up to 100%
• Conformity to EN 50155