OK, I have noticed a lot of talented and experienced members here, so here is a question I need advice on.
I have commercial DC Power Supply that supplies 600VDC @ 50 Amps.
It has a control signal input to set the voltage. The input is a 0-10 Vdc signal to program the output voltage. (Input impedance is 10K ohms)
I need to implement a safety circuit to disconnect the control voltage and ground the control input in cases where I have a failure of the control computer.
It has been suggested that I use a relay. Personally, I hate relays, I call them RMD's...(repulsive mechanical devices!)
I was told by the "powers that be" to use a relay.
I was informed by another Engineer that "I need a special type of 'Dry Contact' relay since I am switching such a low current."
Unfortunately, this other Engineer has a habit of blowing smoke up peoples ass's.....so I would really like to learn if what he is saying is something I need be concerned about.
I have been googling all morning, and really can't find anything to support this statement.
Anybody here got any experience here on this?