The following SIPLUS S7-400 high-availability CPUs with a graded performance spectrum are available for a wide range of different applications in extreme ambient conditions:

• SIPLUS S7-400 CPU 412H
• SIPLUS S7-400 CPU 414H
• SIPLUS S7-400 CPU 416H
• SIPLUS S7-400 CPU 417H

SIPLUS S7-400 high-availability CPUs are designed for use in the following extended ambient conditions:

• Extended ambient temperature range from -25 °C to +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%