21
BVS Cockpit
3.4.5
I/O
The IO interface furnishes six galvanically isolated I/O 24 V switching signals for the connection with sensors, actuator or
PLC.
All inputs and all outputs have a
Common In
or
Common Out
reference potential. This allows using the I/Os either for
PNP logic or NPN logic. A mixed mode (PNP and NPN at the same time) is not possible.
These I/O signals can be used to control the camera or transfer individual information to the host system. As a result, the
image acquisition can be triggered via these I/O signals. Outputting a binary analysis result is also possible. The assign-
ment of the I/O signals is done via the BVS
Cockpit interface (see “Digital I/O interface”).
I/O 0 - I/O 5 (I/O plug connectors)
Operation as input
Voltage
Signal 0
0 to 5 V (I/O zu V
Common In
)
< 2 mA
Signal 1
11 to 30 V (I/O zu V
Common In
)
2 to 8 mA
Delay
0
→ 1
< 70 μs
1
→ 0
< 150 μs
Operation as output
PNP
NPN
Voltage
Signal 0
High-resistance
High-resistance
100 mA max.
Signal 1
24 V (V
Common Out
– V
D
)
0 V (V
Common Out
+V
D
)
100 mA max.
Voltage drop V
D
< 2 V
Delay
0
→ 1
< 20 μs
1
→ 0
< 60 μs
Supply voltage for I/O
1)
Voltage
V
Common Out
2)
24 V
DC
(±20% LPS Class 2)
0V
V
Common In
2)
0V
24 V
DC
(±20% LPS Class 2)
1)
The supply voltage for the I/O of the I/O interface is galvanically isolated from the operational voltage of the
SMARTCAMERA
.
2)
The maximum current for
Common In
and
Common Out
is 630 mA.
Below are examples how inputs and outputs must be connected to obtain input and output function.
NOTE
I/Os of the same name are logically connected with each other.
When operating the I/Os as output, then e.g. I/O 0 is connected at the I/O connection and
I/O 0 at the power connection.
If the I/Os are configured as input, their signals are logically combined with OR. A 1 signal is
recognized if a 1 signal is present either at I/O 0 of the power connection or I/O 0 of the I/O
connection.
