Fuse box 2

From uCtrl.net

This project/unit has been terminated or discontinued, article no longer maintained.

FB2.

Contents 1 Information 2 D-Sub 25-pin 3 Images 3.1 Schematic drawing

Information

FB1 has three 12V and 5V circuits, every circuit has fuses on both polarities and is monitored. Every pair of fuses supplies a optoisolator with positive and negative voltage. When both polarities are present the optoisolator will trigger the inverter. When the input of the inverter is triggered, the output will be inactive. If a fuse should break the optoisolator will cut the signal to the inverter, causing the output to be activated and a LED indicates which circuit is broken. All inverter outputs is connected to a OR gate that sends an alarm signal to MMU. FB2 also monitors and external fuse.

D-Sub 25-pin

1. 5V fuse 1 +
2. 5V fuse 1 -
3. 5V fuse 2 +
4. 5V fuse 2 -
5. 5V fuse 3 +
6. 5V fuse 3 -
7. 5V fuse 4 +
8. 5V fuse 4 -
9. From LED power supply
10. Alarm signal to MMU
11. Signal from external fuse

Images

PCB	PCB	PCB	Work
Inside	LEDs	LEDs	Alarm triggered
3D Sketch	Fuse holders	Fuse holders	Connector in the Rack box
Boks ferdig	FB2 installed in the Rack box

Schematic drawing