Network Card - Network Interface Controller (NIC) User Manual
Chapter 3 Signal Connections
© National Instruments Corporation 3-5 NI PCI-8254R User Manual
5 6 C Common-mode 
signal of the 
NI 8254R main 
power
—
6 7 TTL Output 2 Pulse generator 
output
General-purpose 
output
7 8 TTL Output 3 Pulse generator 
output
General-purpose 
output
8 6 C Common-mode 
signal of the 
NI 8254R main 
power
—
9 NC TRIG 2
*
/TTL 
Output 8
Pulse generator 
output
General-purpose 
output
10 17 V
iso
Isolated power —
11 NC TRIG 0
*
/ISO 
Input 12
Pulse generator 
trigger input
Trigger Change 
Detector, 
General-purpose 
input
12 19 ISO Output 0 General-purpose 
output
—
13 35 ISO Output 1 General-purpose 
output
—
14 34 C
iso
Isolated 
common-mode 
signal
—
15 9 ISO Input 0 Input port, 
Data(0)
—
Table 3-3. Signal Connections (Continued)
44-Pin D-SUB 
on NI 8254R 
Pin Number
37-Pin Terminal 
Block Number
Signal Name
Primary 
Function
Alternate 
Function










