COHU 2900 Series User manual

2900 MACHINE VISION
Cohu Electronics • 12367 Crosthwaite Circle • Poway, CA 92064
[email protected]
www.cohu-cameras.com
858-277-0221
MANUAL NO. 6X-1016A
2900 SERIES MACHINE VISION
MONOCHROME CAMERAS
NO-ADJUST C-MOUNT
17.5 MM BACK SPACE
This camera is intended primarily for operation in the asynchronous reset mode
while using a strobe light to illuminate the scene. A 614 μs strobe window is
available — with an output pulse of this window appearing on the rear panel
connector. This video must be captured with a frame grabber. Either field or
frame mode can be selected with a rear panel switch. The camera will also
produce an image from ambient light while in the asynch reset mode.
A rear panel INHIBIT input provides for integration periods longer than the
standard RS-170 rate when operating in the conventional RS-170 sync mode.
Three other rear panel switches offer selection of 3, 6, or 9 dB gain increase.
CE: CISPR-22, class B; EN55022, class B; EN50082-1
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class A Digital
Device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonble protection against harmful interference when the equipment is operated in
a commercial environment. This equipment generates, uses, and can radiate radio fre-
quency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
WARRANTY
Please refer to the COHU website for product warranty information:
www.cohu-cameras.com
Revision History
Revision Date Comments
Rev A 05/06/2011
• this manual has been revised to comply with
the latest engineering requirements. See ECO
030972 for the list of changes.
Figure 1.
Dimensions

32
2900 2900
6X-1016A 6X-1016A
MACHINE VISION MACHINE VISION
PIN FUNCTION
1PowerReturn
2+12Vdc
3 Video Ground
4 Video Output
5 Sync Ground
6ExternalH.Drive
Input
7 Asynchronous/
Clear/ VDrive
8 Sync Ground
9WINOutput
10 Sync Ground
11 INHIBIT
12 Sync Ground
1
910 12
11
REAR PANEL VIEW
(ALSO WIRING VIEW
OF MATING PLUG)
When the INHIBIT input is pulled low
the camera sensor continues to inte-
grate the current interval. It stops inte-
grating at the first vertical drive pulse
occuring after INHIBIT is taken high
again. Video output then begins after
the end of vertical blanking.
When switch 6 is set to ON, an asyn-
chronous reset input immediately clears
all signals in the sensor so that any im-
age captured after that is a result only
of the new input.
Cohu part no. 1310398-212
Hirose part no. HR10A-10P-12S
(solder-type connections)
When switch 5 is OFF (Asynch mode
Off) the camera output can be viewed
on any standard RS-170 monitor.
When switch 5 is set to ON (asynch
mode On) an output appears only in re-
sponse to an asynch input pulse at pin
7 on the rear panel. A frame grabber is
required to capture this output.
Table 1
Rear Panel
Connector
Figure 3. Asynchronous Reset Timing Diagram
OFF ON OFF ON OFF ON 3 dB gain
6 dB gain
9 dB gain
Field mode
Asynchronous mode
Clear when triggered
Horiz drive 75 ohm term.
Vert drive 75 ohm term.
1
2
3
4
5
6
7
8
(Frame off)
Default / as-shipped positions
Turn on one at
a time - or all off
Figure 2. Rear Panel DIP Switches
H DRIVE
ASYNC
RESET
STROBE
WINDOW
VIDEO
READOUT
SENSOR
TRANSFER
TO READOUT
COLUMN
9 µs 614 µs 2 FIELD PERIODS MIN
BEFORE RESET
V BLANKING INTERVAL TO START OF VIDEO
(20 H / 1270 µs) VIDEO
NOTES:
ASYNC RESET must be coincident with the H DRIVE input signal.
At least two field periods must occur between ASYNC RESET pulses.
See table 2 for odd and even field levels for ambient and strobe light sources.
MODE ILLUMI-
NATION ODD FIELD EVEN FIELD
FIELD AMBIENT REDUCED FULL
STROBE FULL BLACK LEVEL
FRAME AMBIENT REDUCED FULL
STROBE FULL FULL
Notes: Reduced video level will be about 29 dB belowthe full level.
Primary operating modes shown in gray.
Table 2. Async Mode Video Output Levels
INTEGRATION
CLEAR WHEN
TRIGGERED INPUT
MATING PLUG FOR CABLE
Table 2 shows the relative output levels that are to be
expected when asynchronously resetting the camera.