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Surge Protection for your Amplex Modules
The CPU-Guard module is an overvoltage protection module for the AmsCPU/AmsCPU-IO module.
It is used where the AmsCPU/AmsCPU-IO standard protection level (EN61000-6-2, industrial immunity) is not sufficient.
The CPU-Guard is designed specifically for the AmsCPU/AmsCPU-IO, making this module able to withstand surge pulses up to ± 6 kV and burst pulses up to ± 3 kV.
The module has a built-in thermal protection that protects the internal circuits from over-heating due to severe conditions.
The CPU-Guard is designed to be installed on a DIN-rail next to the AmsCPU or AmsCPU-IO.
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- ± 6 kV according to EN61000-4-5
- ± 3 kV according to EN61000-4-4
- The module is protected against internal faults by thermal fuses that disconnect input from output permanently. Subsequent module
replacement is required.
- The CPU-Guard is placed close to the AmsCPU that is to be protected. The AmsCPU is powered by one, two or three phases + neutral through the CPU-Guard.
Nominal voltage: 230 V AC
Nominal frequency: 50/60 Hz
Pin 4 (230 V AC analog input) is an extra phase which the AmsCPU uses for, e.g. cabinet door monitoring. - Connect the CPU-Guard outputs to the equivalent AmsCPU main power connection inputs. See the AmsCPU data sheet.
