Mitsubishi Q172CPU User Manual page 57

2 SYSTEM CONFIGURATION
POINTS
(Note-1) : Overcurrent protection
The overcurrent protection device shuts off the 5VDC or 24VDC circuit
and stops the system if the current flowing in the circuit exceeds the
specified value. When this device is activated, the power supply module
LED is switched OFF or dimly lit. If this happens, eliminate the cause of
the overcurrent and start up the system again.
(Note-2) : Overvoltage protection
The overvoltage protection device shuts off the 5VDC circuit and stops
the system if a voltage of 5.5 to 6.5V is applied to the circuit. When this
device is activated, the power supply module LED is switched OFF. If
this happens, switch the input power OFF, then ON to restart the system.
The power supply module must be changed if the system is not booted
and the LED remains OFF.
(Note-3) : Permissible instantaneous power off time
Permissible instantaneous power off is selected to use the power supply
module.
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