Overview; Isolated Digital I/O Connections; Dry/Wet Contact Support For Digital Input; Isolated Digital Output Connections - Advantech AIIS-3400 User Manual

Machine vision system (computer)

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C.1

Overview

Maintaining good signal connections is one of the most important factors in ensuring

that your application system is sending and receiving data correctly. A good signal

connection can avoid unnecessary and costly damage to your PC and other hard-

ware devices.

C.2

C.2.1

Each digital input channel accepts either dry contact or 0Vdc - 5Vdc wet contact

inputs. Dry contact capability allows the channel to respond to changes in external

circuitry (e.g., the closing of a switch in the external circuitry) when no voltage is pres-

ent in the external circuit. Figure C-1 shows external circuitry with both wet and dry

contact components, connected as an input source to one of the card's digital input

channels.

C.2.2

Each of 8 isolated digital output channels comes equipped with a Darlington transis-

tor. Every 8 output channels share common collectors and integral suppression

diodes for inductive loads. Channels 0 ~ 7 use COM0, and channels 8 ~ 15 use

COM1 as a common pin. If an external voltage (5Vdc - 40Vdc) is applied to an iso-

lated output channel (IDO 0 ~ IDO 15) while it is being used as an output channel, the

current will flow from the external voltage source to the card. Please take care that

the current through each GND pin not exceed 100 mA.

AIIS-3400/3410 User Manual

Figure C.1 Isolated Digital Input Connections

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