© 2016 Thorlabs Scientific Imaging474
DCx Camera Functional Description and SDK Manual
5.5.1.3 Digital Output (Flash) Circuit
Digital output specifications
Output current (short-time)
Output current (permanent)
Collector power dissipation
NOTE
*) For information on how to determine the USB board revision, please refer to the DCx Driver
Compatibility chapter.
The digital output is galvanically isolated using an opto coupler to protect the camera and the PC
against surges. Only DC voltages may be applied to the digital input.
The output of the opto coupler can be used as an open collector or open emitter output. This means
that the output signal can be connected to ground or to the supply voltage. The output signal is
active if the collector-emitter switch is closed (software setting: Flash high active, see also the
Camera Properties: Input/Output section).
Digital output wiring
The following figures show examples of how the digital output is wired.
Wiring of the digital output as an open collector output (rev. 1.2)