Camera interfaces
AVT Prosilica GT Technical Manual
V2.0.8
58
Out 1 and 2 – non-isolated
Out 1
and
Out 2
signals are not electrically isolated and can be used when envi-
ronmental electrical noise is inconsequential and faster trigger response is
required. Tie signal ground to
Camera GND
to complete the external circuit. The
output signal is a
low voltage TTL, maximum 3.3 V. Not suitable for driving
loads in excess of 50 μA.
Out 3 and 4 – opto-isolated
Out 3
and
Out 4
signals are optically isolated and require the user to provide a
voltage level,
Isolated Out Power
. Tie signal ground to
Isolated IO GND
to
complete the external circuit.
Isolated Out Power
can be configured between
5–24 V
. An example of the functional circuit is indicated in the following dia-
gram.
Trigger current, and
OUT ICC
are a function of
Isolated Out Power
voltage.
Figure 42: Prosilica GT
Out 3
/
Out 4
trigger circuit
Note
If
Isolated Out Power
= 24 V, an additional load resistance,
R
is required to limit
OUT ICC.
Isolated Out Power
OUT ICC
R LOAD
5 V
1.0 mA
0 Ω
12 V
2.5 mA
0 Ω
24 V
1.2 mA
15 KΩ
Table 22: Prosilica GT trigger circuit values
OUT 3 / OUT 4
422R
ISOLATED OUT POWER
4.75 K
ISOLATED IO GND
EXTERNAL
CAMERA INTERNAL
TCMT1107
1
2
4
3
3.3 V CAMERA
LOGIC SIGNAL
R
