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Time：2022-03-28Views：0
1. IR function, inrush current protection with soft start, when the power is turned on to supply the current to the cooling fan, the current gradually increases from zero until the cooling fan reaches the maximum speed and rated current. The maximum inrush current when the fan is started is approximately equal to the running current when the fan is running freely, and it will reach the rated speed within 10 seconds.
2. AS function, rotor lock protection and restart with limited current, automatic restart function can realize that when the fan blade is locked and then released, the fan will automatically restart, and when the rotor is locked, the fan current will be reduced to zero , and will automatically attempt to restart the fan every five seconds.
3. MS function, different specifications can be modified according to customer needs. When the fan is locked, the current is reduced to zero, restart the fan, and turn the power off and on again. This function is only used for some high-power devices. kind.
4. FG function, frequency generator or speed signal output, FG signal is an open-collector output signal, it outputs a series of continuous square wave signals, for example, connect the collector output to a "pull-up" resistor, And connect this "pull-up" resistor to the power supply voltage that is compatible with the input level of the speed signal reading signal reading device. The maximum collector voltage can reach 72VDC, and the maximum collector current is 5mA. It should be noted that The power supply for the reading unit must have the same ground potential as the power supply for the fan.
5. RD function, rotation detection function, the RD signal is an open-collector output signal, the hardware of the RD signal is the same as the FG hardware mentioned above, when the fan is running, the RD outputs a "low level" signal, when the heat dissipation RD outputs a "high" signal when the fan is stopped.
6. RDb function, life detection function, the LD signal is an open-collector output signal, the hardware of the LD signal is the same as the FG hardware improved above, when the cooling fan is running normally, the LD outputs a "high level" signal, when the fan When the operation of the LD is lower than 70% of the rated speed, the LD output is "low level". The reason for the slow speed may be the aging of the product or insufficient power supply. The multi-fan alarm wiring method of the LD signal is the same as that of the RDb signal.
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