UNIDOS
webline
Functional units
D776.133.0/1
9
5.3 Main Board
Mains
Connector &
Filter
Rechargeable
batteries
Charge
control
Power
supply
units
Voltages
measurement
Relay
Wide
range
AC / DC
Supply voltages
Host I/O (SERIAL)
Ethernet
TRIP Output
Electrical Isolation
Rear panel
Figure 3: Main board
The main board contains the individual subunits for
generation and monitoring of the supply voltages as
well as for charging the rechargeable batteries. It
fulfills connection functions beside that. Its name
originates from its physical size and implies in no
way, that it houses the main CPU.
The calibration factors for measuring of the supply
voltage are stored in the main board.
The results of the voltage monitoring can be read
out via service e-mail. It is not necessary to execute
measurements inside the device.
