National Instruments NI PCI-8254R - page 32

Chapter 3 Signal Connections
NI PCI-8254R User Manual 3-6 ni.com
16 2 TTL Input 1 Pulse generator
trigger input Trigger Change Detector,
General-purpose
input
17 3 C Common-mode
signal of the
NI 8255R device
main power
—
18 20 TTL Output 4 Pulse generator
output General-purpose output
19 21 TTL Output 5 General-purpose
output —
20 22 C Common-mode
signal of the
NI 8255R device
main power
—
21 23 TTL Output 6 General-purpose
output —
22 24 TTL Output 7 General-purpose
output —
23 22 C Common-mode
signal of the
NI 8255R device
main power
—
24 NC Trig 1*/TTL
Output 9 Pulse generator output General-purpose output
25 33 Viso Isolated power —
26 34 Ciso Isolated
common-mode
signal
—
Table 3-3. Signal Connections (Continued)
44-Pin D-SUB
on NI 8255R
Device Pin
Number 37-Pin Terminal
Block Number Signal Name Primary Function Alternate Function