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Watchmon 4 onboard output
#21
(07-17-2019, 07:59 AM)Sean Wrote: A timely reply from Jaron and a plausible explanation.

Headrc - Batrium mistakenly sent a 12v expansion board to us many moon ago, if you want it you can have it - PM me if it'll be of any use.

(07-15-2019, 07:48 PM)kevinjaye Wrote: Can anyone help me with the onboard mosfet output on the watch mon 4?
I connected a fan to output A on the watchmon based on the info provided  on the batrium site however when I set the output to manually on nothing happens same thing with output B. The software shows the on indicator but nothing at the terminals.



Just Kevin's issue to solve now - which wont be in rush related.
Well my scenario is quite different as initially I tried to use the output to trigger a relay to turn off the charge controller. When that didnt work I tried it with a small 12V 80mA fan. That current is way below 3A.
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#22
Your scenario is exactly the same, an apparently inoperative FET - your image shows the wiring is correct .

I assume neither A or B function and there's no voltage level change across A or B and positive supply to the WM ?
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#23
(07-17-2019, 07:32 PM)Sean Wrote: Your scenario is exactly the same, an apparently inoperative FET - your image shows the wiring is correct .

I assume neither A or B function and there's no voltage level change across A or B and positive supply  to the WM ?
 
Output A shows about 1.5 volts and B 0 volts while the supply voltage is 15 volts
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#24
(07-17-2019, 07:10 PM)Sean Wrote: I've now watched closely the Batrium how to video illustrating the method of using the supervisors onboard FETs to feed the DC to DC to the fan - I've attached a screenshot, and the Batrium schematic.

I now know why folks are killing their FETs (this is not how mine died)

Anyone else see the difference ?





Again in Batriums defence, they have quoted the FET switching specs

but ...... etc etc

Yes its clear. The 12 volt side is connected to the watchmon, not the 48...
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#25
... so the DC to DC is already powered up, any surge (on initial connection to the battery) is easily handled by the battery.

.... whereas the schematic shows the FET switching the DC to DC on its input.
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#26
Exactly. Now what did I win?  Cool
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#27
(07-17-2019, 08:53 PM)RikH Wrote: Exactly. Now what did I win?  Cool

a pair of destroyed FETs, congratulations :-)
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#28
Yes I saw the difference bit thought possibly two different approaches and even inquired about that. I have not heard from Jaron yet on a resolution to my now damaged Watchmon
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#29
Still no reply from anyone at Batrium ....this is disappointing .....whatdoes it take?
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#30
(07-19-2019, 03:34 AM)Headrc Wrote: Still no reply from anyone at Batrium ....this is disappointing .....whatdoes it take?

How many days has it been since you first contacted Batrium for support ?
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