9
4.2. Control board
The Control Board (CNTL) consists of DSP,MR32
、
sense circuit, control circuit and
communication port.
4.3. PARL board
The Parallel Board (PARL) is used for parallel communication when the UPS system
is running in parallel mode.
4.4. Charger board
（
only for long backup time model
）
The input of the charger is connected to REC+/-. When bypass breaker on and
IP/SCR on, the charger will work. The charge voltage is 273VDC and constant charge
current is 4.2A. Adjust the VR1 on charger board can obtain more accuracy of
charger voltage.
4.5. Charger board (only for standard model)
The input of the charger is connected to +/- BUS. The charge voltage is 273VDC and
maximum DC charge current is 2A. Adjust the VR901 on DC charger board can
obtain more accuracy of charger voltage.
