Hardware manual

Camera Impact Reference Guide
Datalogic Automation Inc. 2-24
It is important to understand the scan direction of the Dalsa line scan camera. The camera has a two-line sen-
sor capable of TDI (Time Delay Integration). An image row is exposed with one line of the sensor, then
shifted and exposed again with the other line of the sensor, while the next row of the image is being exposed
in the first sensor line. This doubles the net exposure time without slowing the line rate. In order to operate
in this mode, the camera must know which of the two lines of the sensor is exposed first. This is determined
by the scan direction input (Input 2). If this setting is wrong, the image will be blurred in the vertical direc-
tion.
In Single Phase line trigger mode, Input 2 controls the scan direction. When input 2 is high, the sensor lines
are shifted in the “forward” direction. When input 2 is low, the sensor lines are shifted in the “reverse” direc-
tion. If the scan direction never changes, you can hard wire Input 2 high or low, depending on how the cam-
era is mounted.
In Quadrature Phase line trigger mode, Input 2 triggers Phase B and Input 0 triggers Phase A. The sensor
lines are shifted in the “forward” direction when Phase A leads Phase Band shifted in the reverse direction
when Phase A trails Phase B.
Physically, the forward direction for the 1K and 2K Dalsa line scan cameras runs from the top of the camera
towards the bottom of the camera (from the I/O connector towards the power connector). In the 4K line scan
camera, the forward direction is from the power connector towards the Ethernet connector.
If the part is moving from the bottom of the camera towards the top of the camera, Input 2 should be high (or
encoder Phase A should lead Phase B).
Line Trigger Input Termination
M5xx Camera
CAUTION: Maximum Input Voltage is +6 VDC when the termination resistor is in the circuit.
This setting only affects Inputs 2 and 3. Input 1 is not terminated. There are no debounce settings for Inputs
2 and 3. The ability to configure the termination resistor is necessary because Inputs 2 and 3 can accept TTL,
RS-422, or RS-644 signal types. If this check box is checked, a termination resistor is present on camera
Inputs 2 and 3.
The check box is cleared automatically when the Line Trigger type is set to Single Phase. It is checked auto-
matically when the Line Trigger type is set to either of the Quadrature Line Trigger Types.
You should also check or clear the check box based on the following signal input configurations.
• RS-422
• (camera is end device on the bus): check box must be checked
• (camera is not end device on the bus): check box must be cleared
• RS-644: check box must be checked
• TTL: check box must be cleared
Dalsa Camera
This setting only affects Inputs 0 and 2. Input 1 is not terminated. There are no debounce settings for Inputs
0 and 2. The ability to configure the termination resistor is necessary because Inputs 0 and 2 can accept TTL
(Transistor/Transistor Logic) or LVDS (Low Voltage Differential Signal) mode. To select TTL mode, clear
the Input Termination check box. To select LVDS mode, check the check box.
Frequency Converter