National Instruments PCI-8254R User Manual page 33

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