Camera interfaces
191
Prosilica GT Technical Manual V3.2.0
Out 3
and
Out 4
signals are optically isolated and require the user to provide a
voltage level, Isolated Out Power. The
Out3
and
Out4
signal should be grounded by
adding an external load resistor as shown in the following figure and table. Isolated
Out Power can be configured between 5 to 24 volts.
The influence of various Isolated Out Power values and load values on the timing
response of the trigger is indicated in the following table. Trigger current, Out ICC,
is a function of Isolated Out Power voltage and Load resistor R.
Figure 120: Out 3 and Out 4 trigger circuit
Figure 121: Out3 and Out4 timing diagram
Isolated Out
Power
OUT ICC
R Load
V Load
R Power
Dissipation
T
1
T
2
T
3
T
4
5 V
8 mA
500
Ω
4.2 V
35 mW
1.2
μ
s
5.4
μ
s
5.6
μ
s
64
μ
s
5 V
1.7 mA
2.4 K
Ω
4.0 V
6.7 mW
1.2
μ
s
5.4
μ
s
4.4
μ
s
34
μ
s
12 V
2.1 mA
5 K
Ω
10.4 V
21.6 mW
1.2
μ
s
10
μ
s
4.0
μ
s
47
μ
s
24 V
1.8 mA
10 K
Ω
18.4 V
33.9 mW
1.2
μ
s
15
μ
s
3.4
μ
s
70
μ
s
Table 90: Trigger circuit values
Out 3 / Out 4
422R
Isolated Out Power
E
x
ternal
Camera Internal
TCMT110
7
1
2
4
3
3.3
V
Camera
Logic Signal
R Load
D
S
G
Constant Current
Source
V
Load
Isolated IO Ground
T
4
T
2
T
3
Camera Logic Signal
Out 3 / Out 4
T
1
