Chapter 2
LEDs, DIP Switches, and Connectors
NI CVS-1450 Series User Manual
2-12
ni.com
TRIG 0
The TRIG 0 isolated input on the NI CVS-1450 device provides connection
to external devices, such as proximity sensors and start/stop buttons. For
easy connection to the TRIG 0 input, use the National Instruments SMB
111 coaxial cable (part number 763422-01).
Note
Additional isolated inputs are available on the 44-pin DSUB connector.
Caution
These isolated inputs are compatible with 5 V logic if the external circuit meets
the voltage and current requirements listed in the
Specifications
section of
Getting Started
with the NI CVS-1450 Series Compact Vision System
.
TRIG 1 and TRIG 2
You can use the two TTL outputs available on the SMB connectors for
triggering cameras and external interfaces, such as lighting control units.
For easy connection to the TTL outputs, use the National Instruments
SMB 111 coaxial cable (part number 763422-01).
Note
Additional TTL outputs are available on the 44-pin DSUB connector.
Caution
Do
not
connect voltage or current sources to TTL outputs. Doing so could
damage the NI CVS-1450 device.
General-Purpose Digital I/O
The 44-pin DSUB connector, shown in Figure 2-8, provides access to the
general-purpose digital inputs and outputs. The general-purpose digital
I/O available on this connector includes 2 TTL inputs, 8 TTL outputs,
12 isolated inputs, and 4 isolated outputs. For easy connection to the digital
I/O connector, use the NI Vision I/O Terminal Block and Prototyping
Accessory (part number 779166-01).
For detailed information about digital I/O functionality and recommended
use cases, refer to Chapter 3,
Note
Isolated inputs are compatible with 5 V logic if the external circuit meets the voltage
and current requirements listed in the
Specifications
section of
Getting Started with the
NI CVS-1450 Series Compact Vision System
.
