User manual

Microgate MicroGraph LED User Manual Page 9 of 88
1.4 POWER SUPPLY
Power can be supplied in three ways:
• Connecting the MicroGraph display board to the Microgate network adapter (code
$ACC161, 221W). In this way it is possible to supply a mains graphic display board and
to keep the batteries (if used) charged at the same time. This guarantees perfect
functioning also when the mains power supply is interrupted. The $ACC161 network
adapter operates with an input of 50 or 60 Hz alternate current, within a range of 100
and 240 Volts.
• Using the internal batteries of the display board (optional module $ACC165); in this
case autonomy is usually over 8 hours of continuous functioning (depending on the
type of display used).
• Connecting the display board via the DC/DC 12/48V converter (optional module
$ACC175, 150W) to any direct current supply (stabilized or not) between 11 and 16
Volts, which is able to supply at least 100W peak power and approximately 50W
average power. A (60Ah) car battery usually ensures more than 6 hours continuous
operation (depending on the used display type).
If 2 or more MicroGraph display boards must be powered, the $ACC172 (300W, 48V, sealed)
multiple display board network adapter must be used.
IMPORTANT NOTICE: The $ACC161 network adapters is not suitable for outdoor use.
Consequently Microgate is not liable for any damages to persons or things caused by incorrect use
of the network adapter.
1.4.1.1 BATTERY CHARGING
To enter charging mode, press the green 'START MODIFY' button on the control panel for at least 2
seconds with the display board turned off and after having connected an external power source to
the SUPPLY connector. Charging can take up to 10 hours, depending on the initial battery level.
The charging process can be interrupted by pressing again the green 'START MODIFY' button on
the control panel for at least 2 seconds.
The more frequently lithium-ion polymer (Li-poly) batteries are charged, the longer the battery life
will be.