Users Manual Chapter 1

4 Thor VM3A Vehicle-Mounted Computer
Power Management Modes
The Thor VM3A has three power modes: On, Sleep, and Off.
On Mode
When the computer is attached to vehicle power, external power supply, or is
operating from the UPS battery and the power button is pressed, the computer is in
the On mode. In this mode, the keypad, touch screen, and any attached
peripherals, such as a scanner, function normally. The display remains On unless
the unit transitions to Sleep Mode or screen blanking is activated.
When in On mode, the status LED is solid green.
Sleep Mode
When the computer enters Sleep mode, all LEDs are off. Sleep mode occurs when
the power button is pressed momentarily or the inactivity timer expires.
When in Sleep Mode, the status LED:
• is green, if external power is attached
• is off, if external power is not attached
To wake the computer from Sleep Mode, momentarily press the power button.
Off Mode
When the power button is held, an option menu appears, and Power Off is selected.
The computer is also Off when it is not connected to a power source and the UPS
battery is depleted. However, an internal Real Time Clock (RTC) powered by an
internal battery, maintains the date and time while the computer is Off.
Note: To achieve optimal battery life, Honeywell recommends that end-users power-down/
turn the units off at the end of the shift/use.
About the Power Supply
Vehicle DC Power Supply
Vehicle power input for the dock is 10V to 60V DC and is accepted without the need
to perform any manual operation within the dock, see 12-48 VDC Vehicles (10-60
VDC Direct Connection). The dock provides a regulated power output for the VM3A.
By using a specified DC/DC power supply, input voltage of 50-150V DC can be
accepted, see 60-144 VDC Vehicles (50-150 VDC Power Supply, Screws on Side of
Lid) or 60-144 VDC Vehicles (50-150 VDC Power Supply, Screws on Top of Lid).
Input power to VM3A is fused for protection and the fuse is externally accessible,
see Fuse.