Hello,
I am trying to understand circuit used to verify 3-phase 208v input on an error detector PCB.
The circuit in question appears to consist of two S1VB60 rectifiers and what looks like a TLP521-1 optocoupler. 2 legs of the 3-phase supply run to the AC inputs of the first rectifier, and the 3rd leg of the supply runs to the second rectifier (leaving one of the AC input pins unconnected).
The DC output pins of both rectifiers are connected in parallel, and connect (through resistors) to the anode and cathode pins of the optocoupler.
My questions are:
1) What input/output signals would be expected at the optocoupler under normal operating conditions? (Will the emitter-collector side of the optocoupler produce a steady or pulsed signal?)
2) Could this circuit be modified to satisfy the error condition if only 2 legs of a single phase supply were supplied?
I greatly appreciate any feedback!
I am trying to understand circuit used to verify 3-phase 208v input on an error detector PCB.
The circuit in question appears to consist of two S1VB60 rectifiers and what looks like a TLP521-1 optocoupler. 2 legs of the 3-phase supply run to the AC inputs of the first rectifier, and the 3rd leg of the supply runs to the second rectifier (leaving one of the AC input pins unconnected).
The DC output pins of both rectifiers are connected in parallel, and connect (through resistors) to the anode and cathode pins of the optocoupler.
My questions are:
1) What input/output signals would be expected at the optocoupler under normal operating conditions? (Will the emitter-collector side of the optocoupler produce a steady or pulsed signal?)
2) Could this circuit be modified to satisfy the error condition if only 2 legs of a single phase supply were supplied?
I greatly appreciate any feedback!
