Hello everyone,
I am working on a project that will enable remote control to my rolling shutter.
I have the PCB's printed and soldered with the components, and They are ready to be inserted into the wall.
The control of the rolling shutter is achieved by switching two live wires, as in this schematic:
(More information in this thread)
The SSR is the AQG22105J.
The issue is that the expected behavior from the switches it that only up to one of them should be closed at a time, which means they may be both off (the rolling shutter will stay still), or one of them is open and the other closed (the rolling shutter will go up or down according to which wire is closed).
The state of both switches closed is unknown. The original wiring in the wall (which is drawn in the thread I linked), is based on an SP3T switch and therefore will not allow such state. The SSR's However, are 2 SPST switches, which means this state is possible.
Preventing both SSR's from fully closing can be done in software of course(and it is done), but what about leakage current?
The datasheet says theres a maximum 1.5mA leakage current at 200V@60Hz. My mains voltage is 230V@50Hz, so I guess the leakage will be a little higher. It means that we have around 1.5~2.5mA flowing to both of the "up" and "down" wires which is exactly that unknown state, just with lower current.
My question is, should I worry that this leakage will cause a problem in the motor? The thing is I can't know whether or not the motor will blow up or just don't move until it happens.
Thanks in advance!
I am working on a project that will enable remote control to my rolling shutter.
I have the PCB's printed and soldered with the components, and They are ready to be inserted into the wall.
The control of the rolling shutter is achieved by switching two live wires, as in this schematic:
(More information in this thread)
The SSR is the AQG22105J.
The issue is that the expected behavior from the switches it that only up to one of them should be closed at a time, which means they may be both off (the rolling shutter will stay still), or one of them is open and the other closed (the rolling shutter will go up or down according to which wire is closed).
The state of both switches closed is unknown. The original wiring in the wall (which is drawn in the thread I linked), is based on an SP3T switch and therefore will not allow such state. The SSR's However, are 2 SPST switches, which means this state is possible.
Preventing both SSR's from fully closing can be done in software of course(and it is done), but what about leakage current?
The datasheet says theres a maximum 1.5mA leakage current at 200V@60Hz. My mains voltage is 230V@50Hz, so I guess the leakage will be a little higher. It means that we have around 1.5~2.5mA flowing to both of the "up" and "down" wires which is exactly that unknown state, just with lower current.
My question is, should I worry that this leakage will cause a problem in the motor? The thing is I can't know whether or not the motor will blow up or just don't move until it happens.
Thanks in advance!