ADLINK PCI-7396 - Manual (Page 38)

30
• Operation Theorem
4.4 12V and 5V Power Supply
The SCSI-100 connector CN1 provides +12V and +5V power supply (only
for PCI-7348) for external devices. To avoid the short circuit or the overload
of the power supply, the resettable fuses are added on all the power
supply signals.
The maximum current for 5V power supply is 0.5 A. If the load current is
larger than this limitation, the resistance of the resettable fuse will increase
for the reason of the rising temperature. The rising resistance will further
cause the power supply to reduce the load current. After the condition of
overload or short circuit is removed, the fuse will return to its normal
condition. It is unnecessary to replace the fuse.
The maximum current of 12V power supply is 0.5A, too. The action of the
fuse is the same as that of +5V power supply.