Chapter 3
Camera Functions
page 22
User Manual pco.camera status 12/2004
Figure 3.17:
Diagram of the back plate of the power supply, pco.power:
input signal BNC sockets: control in - [exp trig] and [acq enbl]
output signal BNC sockets: status out - [exp] and [busy]
DIP-switch: voltage level selection, polarity selection and edge
selection for input signals, connection socket to camera,
connection socket to diagnostic interface: RS232, power plug:
90-260 VAC
At [exp. trig.] (exposure trigger) the [start exposure] or
control signal has to be supplied. This is a dynamic (edge
triggered) signal. The input is internally wired with a resis-
tor of R
i
= 10k
Ω
versus signal ground. The voltage level of
the [exp. trig.] signal is selected by putting the DIP switch
in position 1: TTL level or 10-15V. If a positive or negative
signal controls the exposure, after initialization of the [exp.
trig. start] operation mode, the DIP switch is in position
2.The image acquire control signal is fed in at [acq. enbl.]
(acquire enable). This is a static signal (level triggered).
The input is wired internally with a resistor of R
i
= 10k
Ω
versus signal ground. Position 4 of the DIP switch selects
the voltage level of the [acq. enbl.] signal: TTL level or 10-
15V. After initialization of the [acq. enbl.], with the DIP
switch in position 3, the user can choose whether the sig-
nal is HIGH or LOW active, which is different depending
on the voltage level settings (see Figure 3.17). If [acq.
enbl.] is initialized, i.e. it is not on [auto], before every ex-
posure, the status of the [acq. enbl.] signal is checked,
since this signal "enables" or "disables" the exposure
start signals. The following figure illustrates how the input
signals are processed internally:
Summary of Contents for pco.1200 hs
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