DC Switch Operation

[DisasterMaster]

Can someone clarify how a DC switch gets its power in relation to the rectifier and lead acid battery bank?
Basically, I'm asking, does the rectifier take commercial power and convert it to DC to power the CS1000 and also keep a trickle charge on the lead acid battery bank which the batteries provide power in the event the rectifier loses commercial power or... does the rectifier take commercial power and convert it to DC to keep a full charge on the batteries and the the PBX operates strictly from battery power or...am I completely way off on the operation all together?
Any response would be appreciated. Also trying to find an NTP that explains in detail how this works.
All replies welcome.

 

[kstaff22]

The rectifiers convert the AC to DC------------the pbx gets it's power from the rectifiers and does not need the batteries to be connected, at least on the old QBL15 and MFA150's----I have run them without batteries.