19
IC695CPE400 Rackless CPU Quick Start Guide
GFK-3002G
The user-supplied SELV
2
power supply must
supply voltage in the range of 18Vdc to
30Vdc.
Once the power supply cable (or compatible
Energy Pack ACC403) has been attached to
the CPE400 and the power supply has been
turned on, the unit will start booting. There
is no need to push any button.
The unit is equipped with built-in reverse
polarity protection. If + and - are swapped
the unit will not power-up. If + is connected
to FGND, this will cause a short. The power
supply needs to protect itself against this
condition.
Figure 9: 24 VDC Power
Input Module Connector
Inrush Current
The CPE400 may experience an inrush current of up to 49 A for 15 µs.
Overvoltage protection
In the CPE400, the voltage to the inner loads is clamped to 33 VDC. At 33
VDC, the internal clamping diode starts conducting at 1 mA. Any further
increase in the voltage will cause the internal current fuse to blow and/or
the clamping diode to break.
2
SELV = Safety Extra Low Voltage
