I just installed a new Multiplus 2000va in my motor home. The second charge output is connected to The CBE control unit and is basically a 12v signal indicating if 230V is connected or not. On my previous Mastervolt installation this output was only on if I had shore power connected. On my Victron it is currently always on, leading my main panel to believe that I always have 230v. This leads to a warning signal every time I turn on the ignition.
Can I control this output through the USB interface and the configuration software?
No you can not, as described it is permanently on and follows the main DC voltage. As noted above, feed it through a programmable relay via relay assistant to make it switchable.
Output from trickle charger goes to COM, I would connect the signal wire to your system to NO and program the relay assistant to close the relay when ac in is present. I believe you need a second assistant to open the relay when ac in is not present.
Time to fix this after winter storage. Looking at the assistants, is it the programmable relay assistant I should use to detect AC input and control the relay?
Ok, now I have tried setting this up and connected the cable to NO. A bit confused about the relay off/on, does relay on means it is closed? So, the setting is like this:
Anyway I have tried this now I do not get a 230V indication on the panel. Is there some way to view the state of the relay in VE.Configure to verify or would you need to measure the output yourself?
I do not know if you can see it in VE configure. You will need to measure it, have nothing connected and check resistance between NO and COM as shore power is turned on and off.
Because the trickle charge is on the NO connection, when the relay is off it is open, i.e. trickle charge 12V signal is off. So no shore power relay = off = 12V signal off. Shore power on = relay on = 12V signal on.
Do not forget trickle charger output goes to relay COM and relay NO goes to your CBE unit.
Trickel has a separate output on my unit. So in the relay I will only use NO as the signal to the CBE. This should be correct now I think but I still have no 230V signal on my panel.
You can not use the NO terminal on its own, the relay outputs are potential free contacts, i.e. they are just switches, they do not have any voltage on them so you MUST connect a 12V supply to COM otherwise it has nothing to signal the CBE unit with.
. You learn something new every day. Connected and working!!