Chapter 3
Digital I/O Functionality
©
National Instruments Corporation
3-3
NI CVS-1450 Series User Manual
Table 3-2 summarizes the isolated inputs and outputs available on the
NI CVS-1450 device.
I/O for Normal Operation
The following sections describe I/O functions that are available on the
NI CVS-1450 device during normal operation.
Trigger Inputs
Trigger inputs are available from both TTL inputs and isolated inputs. You
can use these trigger inputs to synchronize the NI CVS-1450 device with
an external event, such as the assertion of a signal generated by a proximity
sensor or a PLC to indicate that an inspection item is passing in front of the
camera. The NI CVS-1450 device uses this input to initiate a timed pulse
Table 3-2.
Isolated Inputs and Outputs
Primary Function
Input or
Output
Number
Available
Signal
Names
44-Pin DSUB
on NI
CVS-1450
Device
Pin Number
37-Pin
Terminal Block
Pin Number
Trigger
Input
3
TRIG 0
ISO Input 5
†
ISO Input 8
—
35
40
—
15
27
Quadrature Encoder
Input
1
ISO Input 6
ISO Input 7
37
38
25
26
External Shutdown
Control
Input
1
ISO Input 11
44
31
Product Selection Port
†
Input
1
ISO Input 0
ISO Input 1
ISO Input 2
ISO Input 3
ISO Input 4
15
30
31
32
34
9
10
11
13
14
General-Purpose
Input
2
ISO Input 9
ISO Input 10
41
43
29
30
General-Purpose
Output
4
ISO Output 0
ISO Output 1
ISO Output 2
ISO Output 3
12
13
27
28
19
35
36
37
†
ISO Input 5 can also function as a latch for the product selection port.
