Frame
5-7
Document no. 2044677-001
2.3 Power supply
The menu shows the voltages and temperature
measured by the DC/DC board and CPU board. The
values in the column under
Mean
are the mean
values of last one second, the
Min
column shows
the minimum mean value, and the
Max
column the
maximum mean value of the voltages and
temperature measured during the current power
ON.
The voltages and currents are measured by the
DC/DC Board, except the four lowest under
heading CPU Board A/D, which are measured by
the CPU Board. +5V and +3.3V values come thus
both from the DC/DC Board and CPU Board.
System power and Module power are calculated
by the DC/DC Board.
Voltages
ACDC
AC/DC converter’s output voltage, used as monitor
input voltage when the mains cord is connected. Range
when present: 15.25…16.55V (Note: this includes the
measurement inaccuracy).
EXTDC
External DC input voltage, can be used as monitor input voltage when present, if the mains cord is not
connected. Range when present: 10…16.5V
Bat1
Battery A voltage measured at DC/DC Board. Range 9…12.6V for Li-ION battery
Bat2
Battery B voltage measured at DC/DC Board. Range 9…12.6V for Li-ION battery
VSYS
System voltage at DC/DC Board. This is the monitor input voltage measured at the DC/DC Board after input
voltage selection. Range 9…16.5V.
VBOOST
Boost converter’s output voltage at DC/DC Board. Boost converter’s input is VSYS, which is raised to a
higher level for module bus voltage and battery charging, if needed. Range 14…16V.
VMOD
Supply voltage for modules. VBOOST is fed through a circuit breaker to VMOD. Range 13.8…16V.
I/O_VMOD
Module bus supply voltage that can be connected to Multi I/O Connector at the rear of the monitor.
Connecting depends on the DC/DC Board software. Range when connected: 13.8…16V
+5V
At DC/DC Board. Range 4.8...5.3V.
+3.3V
At DC/DC Board. Range 3.15…3.45V.
Currents
Mod Current
Current from module bus voltage VMOD. Depends on the module configuration.
SYS Current
Current from system voltage VSYS. Depends on the system configuration and battery charging.
Bat current
Current from or to the battery selected (discharge or charge). Measured at DC/DC Board. Depends on
the system configuration and battery charging.
Powers
System power
Power from VSYS, calculated by DC/DC Board software. System power = VSYS * SYS Current
Module power
Power from VMOD, calculated by DC/DC Board software. Module power = VMOD * Mod Current
Temp
Power Temp
Power supply unit temperature, measured at DC/DC Board.
Therm Not CHG
This is subject to change.
Dummy CHG
This is subject to change.
CPU Board A/D
CPU Temp
Temperature measured at CPU Board.
VSYS_OUT
VSYS that is connected to CPU Board and Backlight Inverter by a FET.
Measured at CPU Board. Range 9…16.5V.
+3.3V
Measured at CPU Board. Range 3.15…3.45V.
+5V
Measured at CPU Board. Range 4.75…5.25V.
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