Kontron Microspace Series, Руководство пользователя

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MPC20/20L/21/21C MPC20WOL/21WOL / Safety Regulations
4 Safety Regulations
Safety verifications follow the guidelines adapted from the US Army Communication and Electronics Command
Supplement (1992 version) 1 to AR385-16.
4.1 Safety: Power-On Indicator
The green power indicator is located in the front of the computer system. [MIL-STD-1472D]
4.2 Safety: Coded and Marked Connectors
All connectors (plugs and receptacles) are coded and marked to prevent insertion of the wrong plug into a receptacle
or other mating unit [MIL-STD-1472D]. Depending on the mounted replicator unit, the connectors are PC-Style, DSUB
or MIL versions. The male connectors are de-energized when disconnected. [MIL-STD-454M]
4.3 Protection of the Supply Input Current
Note: The computer system has no internal fuse. To protect the supply input from overcurrent, an external fuse or a
current-limited power supply should be used.
4.4 Safety: Wrong Polarization on the Power Input
Attention: The supply input is protected against wrong polarization with a serial diode. This diode withstands
voltage up to 28Volts.
4.5 Safety: Protection of the Output Currents
There is no overcurrent protection on any peripheral port. The following table shows the maximum available current
at each peripheral connector:
Connector Nominal maximum current
USB 0.5 Amp. @ 5V
KB/MS 0.1 Amp. @ 5V
VGA 0.1 Amp. @ 5V
4.6 Safety: Load Dump Protection in 12V/24V Systems
Danger: There is no integrated protection against load dump!
If the computer system is to be installed in a vehicle (car, truck, train), an external, overvoltage protection must be
attached. Connecting a zinc oxide based metal oxide varistor (MOV) directly at the supply input connector is
recommended. Use a typical 28V clamp voltage for the 12/24V systems.
Example: Varistor: B72220S300K (Infineon) Vbreak=30V