VC4XXX_HW.pdf – Hardware Documentation VC4XXX Smart Cameras
1996-2014 Vision Components GmbH Ettlingen, Germany
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Trigger Input Circuit compatible to VC20XX
and
VC40XX cameras:
The trigger input circuit shown above can be used to connect both – the VC20XX and VC40XX smart
camera families.
Technical data of trigger output:
output voltage:
max. 7V
output curent:
max. 50mA
pull-up resistor:
none,
external resistor required
Note:
An exter
nal pull up resistor is required (for instance 1 kΩ) between Trig Out and 5V+ out in
order to pull the floating trigger output back to high.
T
he 100 Ω Resistor protecting the TTL trigger output Pin 5 from the VC20XX has been
replaced with a self resetting poly fuse (see the following drawing). The trigger output is
switching to ground (active low). The behavior of the output signal however can be
programmed high or low during exposure (see the “Programming Tutorial” or the “Trigin.c”
demo program).
5V Out, Pin 2 (VC20XX and VC40XX)
Trig In+, Pin 6 (VC20XX and VC40XX)
GND, Pin 3 (VC20XX and VC40XX)
Trig In - Pin 1 (VC20XX only!)
R
R
Camera Circuit
Trigger Input Circuit
R pull-up
Trig-Out
GND
External Circuit
!
