They provide power output power if the IBBS master switch is off. They also provide power when the voltage sensed by the IBBS is above 11 volts. From the IBBS manual:Can someone explain why this is recommended? Pros and cons?
Thanks in advance!
I wish there was some way of isolating the individual pass through output lines from the input side. As it is now if you pull the breaker or fuse on the pass through input, you lose power on all 4 of the pass through output lines.Personally I wish the outputs would just stay on when the charge line is turned on.
I have done that. I created a buss for all my passthrus and put the main power to that bus thru a switch.
I find this very useful as it gives me the ability, both in the air or on the ground, to isolate and shut down any of the devices/avionics that has dual input power.
If you don't use the pass thru then the master will turn off the outputs when voltage is sensed on the charge line, which means if you have the charge line on the main bus the output will turn off when you flip on the master (not what you want for avionics back up)
Walt-
So since I don’t have an avionics buss and everything is on the main. Is what you mention above not an issue for my setup.
If ibbs is on first, then you bring on main battery, shouldn’t the change in power source (ibbs off, main on) be so quick it’s irrelevant?
Thanks
If you don't use the pass thru then the master will turn off the outputs when voltage is sensed on the charge line, which means if you have the charge line on the main bus the output will turn off when you flip on the master (not what you want for avionics back up)
Walt-
So since I don’t have an avionics buss and everything is on the main. Is what you mention above not an issue for my setup.
If ibbs is on first, then you bring on main battery, shouldn’t the change in power source (ibbs off, main on) be so quick it’s irrelevant?
Thanks
Part of the reason to have a backup is so you don't get a reboot on start.
I'm not sure how your setup will handle that as the voltage will sag when you hit the start button.
I have thought that the best solution would be use a DPDT switch, that way you could switch the pass thru and the on/off function with the single back up switch. I may do this on my next install which is in the shop now.