PCAN-ISA – User Manual
14
2.5
5-Volt Supply at the CAN Connector
You can route a 5-Volt supply to pin 1 and/or pin 9 of the CAN
connector (independently for each CAN connector on the Dual
Channel version) by setting solder bridges on the PCAN-ISA card.
Thus devices with low power consumption (external transceivers or
optocouplers, for example) can be directly supplied via the CAN
connector.
When using this option the 5-Volt supply is connected to the power
supply of the computer and is not fused separately. The opto-
decoupled versions of the card contain an interconnected DC/DC
converter. Therefore the current output is limited to about 50 mA.
Attention!
At this procedure special care is indispensable, since
there is a short circuit danger. The PCAN-ISA card could be des-
troyed and/or the power supply or electronics of the computer
or other components connected could be damaged.
Attention!
Risk of short circuit! If the option described in this
section is activated, you may only connect or disconnect CAN
cables or peripheral systems (e.g. external transceivers or opto-
couplers) to or from the PCAN-ISA card while the computer is
de-energized.
Important note:
PEAK-System Technik GmbH does not give
guarantee on damages which have resulted from application of
the option described in this section.
Set the solder bridge(s) on the card according to the desired set-
tings. Figure 6 shows the positions on the card; the table below
contains the possible settings.