SVS-Vistek SHR 10GigE, Руководство пользователя

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5.3.6 Optical input
In many trigger signals you find noise, transients and voltage spikes. These are
able to damage components in the camera and trigger signal interpretation might
be difficult.
An optical input separates the electrical trigger and camera circuits. The benefit of
such an optical input is to avoid all these kinds of interaction from power sources
or switches. The disadvantage of an optical input is that it is slower in terms of sig-
nal transmission and slew rate than a direct electrical connection.
If you need super fast response from the camera, direct electrical access is your
choice. If your camera trigger is in the ms range or slower, we recommend to use
the optical input.
An optical input needs some current for operation. The SVS-Vistek optical input is
specified to 5-24 V, 8 mA.
Fig.: 5-37: Optical input
The optocoupler galvanically separates electrical circuits by emitting light on one
side and interpreting light in the other. There is no direct electric interaction
between both electrical circuits.
5.3.7 PLC / Logical operation on inputs
The logic input combines trigger signals with Boolean algorithms. The camera
provides AND, NAND, OR, NOR, XOR, XNOR as below. You might combine
combine true/false states of the inputs to determine camera actions. The result
can be connected to a camera trigger signal or it may be source for the next
logical operation with another input. It is possible to connect it to an OUT line as
well.
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