Advantech PCI-1711 Uživatelský manuál stáhnout pdf (Strana 30)

PCI-1711U Series User Manual 24

3.3.2 Analog Input Connections

PCI-1711U/UL supports 16 single-ended analog inputs.

Single-ended Channel Connections

Single-ended connections use only one signal wire per channel. The volt-

age on the line references to the common ground on the card. A signal

source without a local ground is called a "floating" source. It is fairly sim-

ple to connect a single ended channel to a floating signal source. A stan-

dard wiring diagram looks like this:

TRG_GATE DGND Input A/D External Trigger Gate. When TRG

_GATE is connected to +5 V, it will

enable the external trigger signal to

input. When TRG _GATE is connected

to DGND, it will disable the external

trigger signal to input.

EXT_TRG DGND Input A/D External Trigger. This pin is exter-

nal trigger signal input for the A/D con-

version. A low -to-high edge triggers

A/D conversion to start.

+12V DGND Output +12 VDC Source.

+5V DGND Output +5 VDC Source.

Table 3.2: I/O Connector Signal Descriptions

Signal Input

A.GNDA.GND

A.GND

To A/D

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 45 46

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