MITSUBISHI WDC-BI-V04 Computer Communication Board Card

Product Details

Overcurrent protection

The overcurrent proctector 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.

When this device is activated, eliminate probable causes such as insufficient current capacity or short circuit, and then start the system. When the current has reached the normal value, the system will start from the first.

Overvoltage protection

The overvoltage protector shuts off the 5VDC circuit and stops the system if overvoltage of 5.5 to 6.5V is applied to the circuit.

The power supply module LED turns OFF. When restarting the system, switch the input power OFF, then back ON. The system is started up with an initial start.If the system is not booted and the LED remains off, this means that the power supply module has to be replaced.

Allowable period of momentary power failure

The allowable momentary power failure period of PLC CPUs varies depending on the power supply module used. In the system using the A63P, it is the time from when the primary side of

the stabilized power supply supplying 24VDC to the A63P turns OFF until the voltage (secondary side) has dropped from 24VDC to the specified value (15.6VDC) or less

Inrush current

If power is reapplied immediately after power OFF (within 5 seconds), an inrush current exceeding the specified value may flow (for 2ms or less). Therefore, before reapplying power, make sure that 5 seconds have elapsed after power off. When selecting a fuse or breaker for an external circuit, consider the above as well as meltdown and detection characteristics.

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