Gopel Electronic basicCON 4121 Video Dragon, User Manual, Page: 22 / 86

Hardware
2-10 basicCON 4121 – User Manual
The
Digital IO/ CAN
connector (9) includes all signals independent of
the
Media Interface Module
for communication and interaction with the
test object. With this, universal digital inputs and outputs are available
for the user, as well as optionally one CAN port.
Find the
Electrical Characteristics of the interfaces in the
corresponding chapter.
The following table shows the pin assignment of the connector (9):
Pin Signal Pin Signal
1 CAN High 9 CAN Low
2 V
Bat
(isolated) 10 Ground (isolated)
3 Digital Output 0 11 Digital Input 0
4 Digital Output 1 12 Digital Input 1
5 Digital Output 2 13 Digital Input 2
6 Digital Output 3 14 Digital Input 3
7 Digital Output 4 15 +5V DC Output (isolated)
8 Digital Output 5
These interfaces are galvanically isolated from the mainboard (see the
Galvanic Isolation chapter). They can be supplied internally by the
Video Dragon
as well as externally via
V
Bat
(5 ... 28V DC).
An overview regarding power supply of the interfaces is given with the
following figure:
VBat
CAN
Transceiver
Digital IO
Driver
Isolator
Power
Regulator
5V
5V
Iso
VBat
5V
Iso
5V
Iso
12V
Iso
VBat
DIO
VBat
TRX
12V Iso
Enable
The drivers of the digital outputs are always supplied with the internal
isolated 5V, but they can also be supplied in parallel to that via the
external battery voltage
V
Bat
. In this case, the “VBat DIO” voltage of
the digital outputs follows the higher one of both voltages.
The bus level for CAN follows the “VBat TRX” voltage. This can be
supplied internally via a switchable 12V supply or also in parallel to
that via the external battery voltage
V
Bat
. If the external voltage is
used, the internal supply should be switched off.
The six digital outputs can be used to output states or to control the
test installation.
The four inputs can realize the
Video Dragon’s
control via external
devices.
2.3.12 Digital IO/
CAN
Figure 2-7:
Power supply
Digital IO/ CAN