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National Instruments Corporation
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Specifications
This appendix lists the specifications of the IMAQ PCI-1424 device.
These specifications are typical at 25 °C, unless otherwise stated.
External Connections
Number of external trigger I/O lines...... 4
Trigger input
Voltage range .................................. 0 to 5 V (TTL)
Input high voltage .................... 2.0 V
Input low voltage ..................... 0.8 V
Polarity............................................ Programmable,
active-high or active-low
Trigger output
Voltage range .................................. 0 to 5 V (TTL)
Output high voltage ................. 2.4 V at 15 mA source
Output low voltage .................. 0.55 V at 10 mA sink
Polarity............................................ Programmable,
active-high or active-low
Power-on state........................................ Input (high-impedance)
10 K
Ω
pull-up to 5 V
PCI-1424 RS-422/TTL
Pixel clock
Signaling type ................................. Configurable, RS-422 or TTL
Polarity............................................ Configurable, rising or falling
edge
Enable
Signal type ...................................... Configurable, RS-422 or TTL
Polarity............................................ Configurable, active-high or
active-low
