Hey, I'm new to this forum. I came to the forum while searching for help to this question.
I have 2 fire alarm panels that should trigger same solenoid valve (24v low current like 125mA) in case of fire (one panel or another another, when in fire condition). Each fire alarm panels have a 24vdc output for that function (extinguishing release). Positive is always present, and each output sends the negative when extinguishing release condition occur.
I think I can do that with relays but I'm trying to make it easier with diodes due to space limitations.
I've polarized positive and negative from the extinguishing output in each panel with diodes 1n4007. When I try the systems, all seem to work... When one of the panels power the solenoid valve i don't measure 24v voltage in the return to the other panel that is not in alarm state.
But when I try to reboot the panel that is in alarm condition, triggering the solenoid valve, I get an earth fault in the other panel. When I reset the 2nd panel, I get earth fault in the first one... Very strange! Can anyone help me with these connections please?
Thanks in advance!
I have 2 fire alarm panels that should trigger same solenoid valve (24v low current like 125mA) in case of fire (one panel or another another, when in fire condition). Each fire alarm panels have a 24vdc output for that function (extinguishing release). Positive is always present, and each output sends the negative when extinguishing release condition occur.
I think I can do that with relays but I'm trying to make it easier with diodes due to space limitations.
I've polarized positive and negative from the extinguishing output in each panel with diodes 1n4007. When I try the systems, all seem to work... When one of the panels power the solenoid valve i don't measure 24v voltage in the return to the other panel that is not in alarm state.
But when I try to reboot the panel that is in alarm condition, triggering the solenoid valve, I get an earth fault in the other panel. When I reset the 2nd panel, I get earth fault in the first one... Very strange! Can anyone help me with these connections please?
Thanks in advance!