What do 3DI, 3DO, 1 AI, and 1 AO mean in the context of frequency converters discussed by electrical engineers?
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What do 3DI, 3DO, 1 AI, and 1 AO mean in relation to the frequency converter discussed by the electrical engineer? Could you explain it in detail? Thank you very much
D--Digital quantity； A--Analog value ； I--input ； O--Output. 3DI refers to 3 digital input channels.
Sir, could you please specify which 3 numbers are for input, which 3 numbers are for output, which one is the analog input, and which one is the analog output? ? ? Thank you!
These are terms related to control: DI stands for digital input, DO stands for digital output, AI stands for analog input, and AO stands for analog output. If this sentence is expressed from the side of the frequency converter, it means that the frequency converter requires: an AI refers to the control signals sent by control systems such as DCS or PLC, that is, the speed control setpoint signals ； An AO refers to the speed signal sent from the inverter to the control system ； The status signals sent by a conventional frequency converter to the control system are: running, fault, and stopped – a total of 3 ； The status signals sent by the control system to the inverter are: on, stop, and start allowed – a total of 3.
Sir, what are the set points for the float level switch? Could you explain it in a similar way as above? Thank you!
The number of points required for a level switch depends on the specific situation; if it serves only for high or low level alerts, it represents just one DI point for the control system. If a level switch is to provide both high and low alarms, it requires two setpoints. Your instrumentation specialty will verify these issues in detail. For reference.
3 switch signal inputs, 3 switch signal outputs, 1 analog signal input, 1 switch signal output
3 switch signal inputs, 3 switch signal outputs, 1 analog signal input, 1 analog signal output. Sorry, I wrote a word wrong
3DI – 3 digital inputs; 3DO – 3 digital outputs; 1 AI – 1 analog input; 1 AO – 1 analog output