National Instruments PCI-8254R Manuel d'utilisateur télécharger pdf (Page 30)

Chapter 3 Signal Connections

NI PCI-8254R User Manual 3-4 ni.com

Figure 3-2 illustrates the 44-pin D-SUB connector on the NI 8254R.

Figure 3-2. NI 8254R 44-Pin D-SUB Connector

Table 3-3 lists pin numbers, signal names, and signal descriptions for the

44-pin D-SUB connector on the NI 8254R and the 37-pin terminal block.

Caution Do not draw more than 500 mA combined from the V pins on the 44-pin D-SUB

connector. Do not draw more than 100 mA from 24 V or 30 V isolated outputs. Do not draw

more than 50 mA from 5 V isolated outputs.

Table 3-3. Signal Connections

44-Pin D-SUB

on NI 8254R

Pin Number

37-Pin Terminal

Block Number

Signal Name

Primary

Function

Alternate

Function

1 1 TTL Input 0 Pulse generator

trigger input

Trigger Change

Detector,

General-purpose

input

2 3 C Common-mode

signal of the

NI 8254R main

power

—

3 4 TTL Output 0 Watchdog timer

output

General-purpose

output

4 5 TTL Output 1 Pulse generator

output

General-purpose

output

11631

153044

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 42 43

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National Instruments PCI-8254R Manuel d'utilisateur Page 30