Baumer BA Scatec10 15 - Manual (Page 9)

User manual Scatec-10 / -15 9 / 44 Baumer Electric AG
Version 2011-03 www.baumer.com Frauenfeld, Switzerland
7 Signal sequence
The yellow edge indicator LED lights as long as the laser beam strikes an edge. The end of an edge (amber
edge LED turns off) triggers the output pulse and the dead time. The dead time starts immediately with the
trigger, while the delivery of the output pulse can be delayed (pulse delay adjustable by the customer).
During the dead time, SCATEC-10 /-15 is inactive, i.e. an edge ending during the dead time will not initiate
an output pulse and is therefore suppressed. As a consequence output pulses are separated in time by at
least the length of the dead time. Please note, the Scatec-10 / -15 cannot deliver the next pulse before the
preceding output pulse has elapsed. Therefore, an edge following after a time shorter than the output pulse
length will be suppressed, even when the dead time is set to zero. Suppressed edges do not trigger a dead
time.
The schematic below shows a pulse sequence where output pulses are delivered with no pulse delay and
where some edges are suppressed because they occur during a dead time.
For in-depth explanations of pulse length and dead time, please refer to section 9.2 Comments on the
operational parameters.
amber edge-LED
output pulse (pulse period: p)
dead time (period: t )
Running direction
on
off
high
low
on
off
time
t
p