Page 72 of 85
viasis 3003 user manual
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8.3 Changing the battery
To withdraw the battery unfasten the cover brackets and open the cover of the battery box,
placed on the backside of the viasis display system.
Remove the plug of the battery cable from the control panel socket, see illustration 8. Untight-
en the knurled nut above the turn bolt, turn the bolt aside and take out the battery. To install
the battery proceed in reverse order.
Attention: In case of two or more batteries – disconnect all empty batteries
first before reconnecting the charged batteries. Otherwise the fuse(s) might
be blown, due to the high current flow between empty and full batteries.
When you close the battery box cover take care not to press or cut the battery cable
wires.
8.4 Changing the fuse
In order to change the main fuse open the cover of the battery housing on the backside of the
display system. The main fuse holder is placed in the upper right corner of the control panel.
Replace the fuse with a mini 5 Ampere inert vehicle plug in type fuse.
Attention: Replace the fuse by the same type. Using fuses with higher cur-
rent values means in worst case a burned down system, if an electric
internal short circuit occurs!
8.5 Serial RS232 interface connector
The serial RS232 D-SUB socket is placed on the control panel in the battery box.
Only data receive and send line, signal ground line and shielding are connected by the interface
cable. This means no hardware control (RTS, CTS, ....) for the data flow is supported.
The pin connections (scheme see table below) at the 9 pole D-SUB connector of the interface
cable comply to the RS232C interface standard, used in almost every personal computer, lap-
top or palmtop. Should the communication be impossible even after correct setting of the
interface parameter and the right serial port chosen, check the interface description of your
computer manual. It might be necessary to exchange the RxD and TxD line at the D-SUB con-
nector.
If you have a computer with 25 pole DSUB serial interface connector, a ready-made adapter to
the 9 pole DSUB connector of the interface cable can be purchased in computer trade shops or
from us.
pin
signal
description
2
TxD
viasis transmit data
3
RxD
viasis receive data
5
GND
Ground
