National Instruments NI PCIe-8255R User Manual page 32

Chapter 3 Signal Connections
44-Pin D-SUB
on NI 8255R
Pin Number
1
2
3
4
5
NI PCIe-8255R User Manual
Figure 3-2 illustrates the 44-pin D-SUB connector on the NI 8255R.
Figure 3-2. NI 8255R 44-Pin D-SUB Connector
Table 3-2 lists pin numbers, signal names, and signal descriptions for the
44-pin D-SUB connector on the NI 8255R and the 37-pin terminal block.
Table 3-2. Signal Connections
37-Pin
Terminal
Block Signal
Number Name
1 TTL Input 0
3 C
4 TTL Output 0
5 TTL Output 1
6 C
44 30 15
31 16 1
Primary
Function
Pulse generator
trigger input
Common-mode
signal of the
NI 8255R device
main power
Watchdog timer
output
Pulse generator
output
Common-mode
signal of the
NI 8255R device
main power
3-4
Alternate
Function
Trigger Change
Detector,
General-purpose
input
—
General-purpose
output
General-purpose
output
—
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