Table of Contents
Advertisement
Connecting to a TTL device
To connect your Matrox Iris GT to a device that only accepts TTL signals, you
must use an external voltage source because TTL devices expect to be connected
to a sourcing signal and the auxiliary output signals of your Matrox Iris GT are
sinking signals. If using a 24 V voltage source, you must first connect an external
voltage divider between them. Select a voltage divider whose resistors reduce the
voltage such that the connected third-party device receives 5 V.
❖ Note that resistors rated for ¼ W are recommended, since they can handle the
expected power.
Then, connect the voltage input wire from your external voltage divider to the
24 V voltage source, and connect the ground of your voltage divider to the ground
of your smart camera.
Matrox Iris GT digital I/O
and power connector
AUX(USER)_OPENC_OUT6
1. Note that the output can sink up to 100 mA.
If using a different voltage than 24 V, replace 24 V in the above formula
accordingly. If the external voltage source is 5 V, use a pull-up resistor instead of
a voltage divider. For more information, refer to Connecting to a lighting controller
subsection, later in this section.
Connecting external devices to auxiliary output signals
R
2
×
------------------ -
V
=
24V
0
R
+
R
1
2
+24 V
R
1
1
R
800 Ω
2
GND
External
voltage
divider
3 KΩ
V
0
Third-party
TTL device
5 V
89
Advertisement
Table of Contents
