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POINT
*1: Overcurrent protection
The overcurrent proctection device shuts off the 5VDC and/or
24VDC circuit(s) and stops the system if the current exceeding the
specified value flows in the circuit(s).
As this results in voltage drop, the power supply module LED turns
OFF or is dimly lit.
After that, eliminate the causes of overcurrent, e.g., insufficient
current capacity and short circuit, and then start the system.
When the current has reached the normal value, the initial start up
of the system will be performed.
*2: Overvoltage protection
The overvoltage protection shuts off the 5VDC circuit and stops the
system if the overvoltage of 5.5 to 6.5V is applied to the circuit.
This results in the power supply module LED turning OFF.
When restarting the system, power OFF and ON the input power
supply, and the initial start up of the system will be performed.
If the system is not booted and the LED remains off, this means
that the power supply module has to be replaced.
*3: Allowable momentary power failure period
The programmable controller CPU allowable momentary power
failure period varies with the power supply module used.
In case of the A1S63P power supply module, the allowable
momentary power failure period is defined as the time from when
the primary side of the stabilized power supply for supplying 24VDC
to the A1S63P is turned OFF until when the voltage (secondary
side) has dropped from 24VDC to the specified value (15.6VDC) or
less.
*4: Inrush current
If the power supply module is re-powered ON right after powered
OFF (within 5seconds), the inrush current exceeding the specified
value (2ms or less) may be generated. Therefore, make sure to
re-power ON the module 5seconds after power off.
When selecting a fuse or breaker for external circuit, consider the
above point as well as meltdown and detection characteristics.