Chapter 3
Signal Connections
©
National Instruments Corporation
3-3
NI 951x User Manual
Note
All signals are not available on all modules. Refer to the individual module pinouts
in Chapter 2,
Hardware Overview
, for a list of the signals available on each module.
Position Capture
Position Capture
• High-speed position capture input
• 5 V TTL input
• 100 ns minimum pulse width
• ±2 mA max input current
• Digitally filtered
Position Compare
Position Compare
• High-speed position compare output
• 5 V TTL output
• 100 ns minimum pulse width
Digital Inputs
Digital Input 0
• General-purpose digital inputs
• Configurable for sinking or sourcing
• 0 to 30 V input range
• 100
μ
s minimum pulse width
• Digitally filtered
Digital Input 1
Digital Input 2
Digital Input 3
Digital Outputs
Digital Output 0
• General-purpose digital outputs
• 0 to 30 V digital outputs configurable as
sinking or sourcing
• ±100 mA maximum current
• 100
μ
s minimum pulse width
Digital Output 1
V
sup
V
sup
• NI 951x power supply input
• 19 to 30 V
• Connection required to either the DSUB
or MDR
• 400 mA maximum current
COM
COM
• Reference for digital I/O
• Reference for V
sup
• Reference for +5 V OUT
Table 3-1.
NI 951x Signal Reference (Continued)
Signal
Signal Name
Signal Overview