Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Hi folks!
Most motor control panels i have seen locally , have a lamp/indicator labelled 'fault'. It is illuminated when there is a fault of any sort in tthe circuit.Unfortunately , how the wiring is done is above my head.
Can anyone help me out?
It's done fairly regualrly in a vehicle to help distinguish a drivers door from a passenger door being opened.
The door switces are say connected to the dome light via a diode to ground. This effectively isolates the switches.
This does implement When either door is open, the dome light comes on.
I wanted a buzzer that operated when the driver's door was opened AND the headlights were on.
But let;s make it simpler for the time being, I want a light that says, "Passenger door open" and one thet says "Driver's door open".
I can again take +12, a light bulb and diode (2 sets) and connect them to each door swich and get an indicator for each door open and one for either door open (The dome light).
How did I do the heatlight on with the driver's door open?
Nearly every time I've come across that in industry the fault lamp is connected to the overload relay, if the motor pulls too much current the overload relay 'trips' disconnecting the supply to the coil of the motor contactor, the fault lamp is connected to the normally open contacts of the thermal relay so its on when a trip has occured.
Later control panels use a plc, a programmed controller, the fault indicator in this case is controlled by software.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.