Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 88

Detailed explanation of items
■ Input power supply voltage
Input power supply voltage is a voltage required for the power supply module to operate normally. If the voltage is out of the
specified range, an error is detected and the system may stop.
■ Inrush current
Inrush current is the maximum, instantaneous input current drawn into the circuits immediately after power-on.
If power is supplied to the system immediately after shut-off, an inrush current of more than the specified value may flow.
Wait for five seconds or more after shut-off, and supply power to the system again.
When selecting a fuse or a breaker for the external circuit, consider blowouts, sensing property, and specified value of inrush
current.
■ Overcurrent protection
The function of this protection is to shut off the circuit to stop the system if a current exceeding the specification value flows
into a circuit of 5VDC or 24VDC.
With overcurrent protection activated, the LED of the power supply module goes off or lights dim green due to a voltage drop.
To restart the system, shut off the power and eliminate the cause of the problem, such as insufficient current or short-circuit.
After the cause is eliminated, wait for a few minutes, and supply power to the system again. When the output current is back
to normal, the system starts initially.
■ Overvoltage protection
The function of this protection is to shut off the circuit to stop the system if an overvoltage exceeding the specified value is
applied to a 5VDC circuit.
With overvoltage protection activated, the POWER LED of the power supply module turns off.
To restart the system, shut off the power, wait for a few minutes, and supply power to the system again. Then, the system
starts initially.
If the system does not restart and the POWER LED remains off, replace the power supply module.
■ Allowable momentary power failure time
The system detects an input voltage down and stops its operation when a momentary power failure occurs. Allowable
momentary power failure time is a period of time that the system can continue its operation even after the power failure.
If power fails exceeding this period of time, the system can either continue its operation or start initially, depending on the load
of the power supply module. When the system continues its operation, the operation will be the same as that of the system
returned within the allowable momentary power failure time.
4 SPECIFICATIONS
86
4.2 Performance Specifications of Power Supply Module