Instruction manual

M-Series Processor and Camera Guide Dalsa Cameras
3-41 Datalogic Automation, Inc.
Note 1: The Trigger inputs can operate using TTL (Transistor/Transistor Logic) or LVDS (Low Voltage Differential Sig-
nal). The mode is selected in VPM in Settings - Camera - Line Scan tab. To select TTL mode, clear the Input Termination
check box. To select LVDS mode, check the check box. Frame Start Trigger always uses TTL mode.
Note 2: The Line Trigger mode is selected in VPM in Settings - Camera - Line Trigger tab.below
Dalsa Scan Direction
It is important to understand the scan direction of the Dalsa line scan camera. The camera has a two-line sensor 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 direction.
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” direction. If the scan direction
never changes, you can hard wire Input 2 high or low, depending on how the camera 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.
3
Input 1 +
Frame Start Trigger As sinking input
Off 0 to +0.66 VDC
On: +2.6 to +5 VDC
As sourcing input
Off: +2.6 to +5 VDC
On 0 to +0.66 VDC
Maximum: +5 VDC
4 No Connection DO NOT USE
5 Camera Ground Input minus for all Inputs when TTL
Mode is selected
Isolated from Power Ground
6
Input 2 +
Scan Direction
OR
Phase B Line Trigger
(Quadrature Encoder)
See Note 2 below and
“Dalsa Scan Direction” on
page 3-41
As sinking input
Off 0 to +0.66 VDC
On: +2.6 to +5 VDC
As sourcing input (see Input 3 Pullup)
Off: +2.6 to +5 VDC
On 0 to +0.66 VDC
Maximum: +5 VDC
7
Input 2 -
LVDS mode differential See Note 1 below
8 through 15 No Connection DO NOT USE
I/O Terminal
Block Number
Signal Name Notes