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UPS battery charger board reconfigure

Gaber Mohamed Boraey

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Hello everyone
I have battery charger board, normally it's installed in a UPS machine, 3 PHASE, 32 batteries, 2 strings, each 16 are series together with one neutral, positive and negative
Anyway, that's not the issue now
The issue is that I need that board outside the UPS, for charging batteries outside the UPS, need to function outside
What I've understood from the UPS system, that the charger board is controlled from another board, with one socket named " CHGR on/off", also Bother socket named " CHGR detect"
Shown below
IMG_20250128_150603.jpg

These two sockets then connected to the charger board
This one
IMG_20250128_145118.jpg

What I need do, is to power this charger board with the control from this seperate board, but different control I do by myself
By the way, the charger board take dc voltage input from bus voltage which is about 360v dc, positive and negative
And then it output approximately 200v for charging 16 batteries Im series
I've tried to Analyse the circuit as much as I can for know how to turn on the charger, and I think I should apply external 12v with external ground at the pins 1 and 3 of CHGR on/off socket
And so for trigerring the UC3845B and the output relay
Can I do this?, or you see something I don't see?
For the CHGR detect I not sure what I do with it, leave it or put resistor instead, as when I measure from seperate board it give certain ohm
Here are my photos
IMG_20250128_145118.jpg
IMG_20250128_145903.jpg
IMG_20250128_150143.jpg

By the way, the CHGR socket and CHGR detect are coupled as this board have similar for charging the other 16 batteries
So, the two sockets are the same, take from one board, then give to two charging boards via sockets in the charger board
Can I power this charger without UPS control?
 


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