Advantech PCI-1731 Dokumentacja Pobierz pdf (Strona 27)

Chapter 3

– 23 – PCI-1711/1731 User’s Manual

Advantech Co., Ltd.

www.advantech.com

+7 V D/A output.

Figure 3-3 shows how to make analog output and external reference

input connections on the PCI-1711.

Fig. 3-3 Analog output connections

3.5 Trigger Source Connections

Internal Pacer Trigger Connection

The PCI-1711 includes one 82C54 compatible programmable timer/

counter chip which provides three 16-bit counters connected to a 10

MHz clock, each designated specifically as Counter 0, Counter 1 and

Counter 2. Counter 0 is a counter which counts events from an input

channel or outputing pulse. Counter 1 and Counter 2 are cascaded to

create a 32-bit timer for pacer triggering. A low-to-high edge from the

Counter 2 output (PACER_OUT) will trigger an A/D conversion on the

PCI-1711/1731. At the same time, you can also use this signal as a

synchronous signal for other applications.

External Trigger Source Connection

In addition to pacer triggering, the PCI-1711/1731 also allows external

triggering for A/D conversions. When a +5 V source is connected to

TRG_GATE, the external trigger function is enabled. A low-to-high

edge coming from EXT_TRG will trigger an A/D conversion on the

I/O Connector

External Reference

For DA

Signal

External Reference

For DA

Signal

xterna

DA0

DA1

Load

DA0_REF

DA1_REF

DA1_OUT

DA0_OUT

AOGND

INT_REF

DATA BUS

-5V

-10V

nterna

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 59 60

Komentarze do niniejszej Instrukcji

Brak uwag

Advantech PCI-1731 Dokumentacja Strona 27

Komentarze do niniejszej Instrukcji