What are the types of external output control terminals of frequency converters?
The external output control terminals of the inverter can be divided into four types: analog output, pulse output, transistor output and contact output. Analog output (Fma), Its output is DC voltage (Such as 0-10 V)
Only one data can be monitored, that is, only one of the parameters such as output frequency, output current, output voltage, output torque, input power, pg feedback, pid feedback value can be selected for display. The minimum connection impedance is 5 K.
The pulse waveform output is fmp, also known as frequency monitoring. Through the transistor pulse voltage output, the monitoring signal content is the same as fma.
Its output consists of transistors with a minimum connection impedance of 10k Ω.
Transistor output is programmable, so it is also called state output.
The specific application of each output terminal can be determined by setting.
It outputs various monitoring signals through the transistor collector open circuit. Its output is running and the frequency arrives.
Frequency detection, analog frequency given signal disconnection detection, overload alarm and other dozens of signals.
The contact output outputs the contact signal through the relay inside the inverter, so the contact current is very large, and some inverters also have relays with optional signal output.
Some contact output terminals are also programmable, and most of these output terminals are only available for DC low voltage circuits.
Some inverters also have optional signal output relays and can choose to operate in abnormal or normal operation.