User manual

Interfaces
Central processing unit
COM1 is the interface for connecting standard peripherals with their own
power supply or for data transfer.
COM2*, COM3* and COM4* are for connecting POS peripherals that do
not have their own power supply, such as scanners and displays. COM2*,
COM3* and COM4* make +5V and +12V voltage available.
The BEETLE /20 also has a parallel interface and a DC24 (24V)/2A(max)
power supply interface for connecting a POS printer and two mini-DIN sok-
kets for connecting a keyboard and a cash drawer.
The SVGA/VGA/LAN/ASYNC interface is connected optionally to a
SVGA;VGA, LAN, SVGA or VGA/LAN adapter. Non-identified sockets are
reserved for a subsequent purpose.
Only equipment that has been approved by WN can be con-
nected to the BEETLE /20. If in doubt, contact your WN
branch or authorized dealer.
Loudspeaker
An internal loudspeaker is connected to the central processing unit. You
can adjust the volume using the control knob on the back of the
BEETLE /20 (see page 15).
Non-volatile RAM (NV RAM)
With the appropriate software, this memory chip can be used to store im-
portant data, such as sales totals or diagnostics entries, without the need
for a power supply. The data retention time is five years.
Central processing unit
GB - 69