«CamName» User’s Manual
12
DALSA Corp.
03-32-00253-13
2.5 Power Supplies
Follow these guidelines when setting up power supplies:
•
Keep power cable connections as short as possible.
•
Use an oscilloscope or multimeter to check the voltages present on your
power/control cable
before
you connect it to the camera.
•
IMPORTANT
: If you use multiple power supplies, make sure all grounds are
connected together both at the camera and at the supplies.
•
Do not use the shield conductor on a multi-conductor cable for ground.
See section 1.3 for power supply requirements.
The companies listed below make power supplies that meet the camera’s requirements,
but they should not be considered the only choices. Many high quality supplies are
available from other vendors. DALSA assumes no responsibility for the use of these
supplies.
•
Uniforce, 408-946-3864 (CA, USA)
•
Power-One, 805-987-8741 (CA, USA)
•
Vision 1, 406-585-7225 (MT, USA)
•
Tectrol Inc., 416-630-4026 (ON, CAN)
•
Xantrex, 206-671-2966 (WA, USA)
2.6 User Bus (Inputs)
The User Bus uses a DB15 connector and includes the mandatory control signal EXSYNC
and optional signal PRIN. These signals must be supplied from your imaging system to
the camera in EIA-644 (LVDS) format, which requires the use of twisted pair cable.
DALSA recommends shielded cables. Maximum cable length depends on environmental
factors and EIA-644 limitations. See Appendix A.
EXSYNC
EXSYNC is a mandatory control signal that initiates line readout. The rising edge of the
EXSYNC control signal triggers line readout, so the frequency of EXSYNC equals line rate
and also determines integration time. Note that EXSYNC is rising-edge sensitive and
must toggle; restricting EXYNC to logic HIGH or logic LOW prevents line readout.
Minimum high or low time is 100 ns. Minimum frequency is 300Hz.
Note:
EXSYNC must not be clocked faster than the camera’s specified line rate.
PRIN
PRIN performs asynchronous reset/electronic shuttering. It is an optional signal that can
shorten the effective exposure time by resetting the pixels (clearing accumulated charge)
on the image sensor between EXSYNC-triggered line readouts. PRIN is active during
logic LOW; exposure effectively begins on the rising edge of PRIN.
PRIN is an optional signal; if not using PRIN, connect PRIN to logic HIGH and PRINB to
logic LOW.
.
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