Dear Control Engineers,
I have this pcb which has LEDs to indicate the Alarm condition. the sensors are switches installed on the Engine. i have some understanding but there are certain things which still confuse me. please help me in understanding how this card works.
It's very hard to read the text, and I can't get it to print out. But I believe the first link is not just an alarm, it's also some interlocking. My guess is it's a generator or something with an engine. I think all the diodes grouped together are collecting the various alarms for an audible device or perhaps a trip relay.
The Alarm lights are the ones in the middle with a resistor above.
Any chance of getting a more legible link?