Advantech PCI-1730 Bedienungsanleitung PDF herunterladen (Seite 33)

25 PCI-1730/1733/1734 User Manual

Chapter 3 Signal Connections

Isolated Digital Input

Each of the 16 isolated digital input channels accept voltages from 5 to 30 V. Every

eight input channels share one external common. (Channels 0 ~ 7 use ECOM0.

Channels 8 ~ 15 use ECOM1.) The following figure shows how to connect an exter-

nal input source to the card's isolated inputs.

Figure 3.6 Isolated DI Connection

Isolated Digital Output

Each of the 16 isolated DO channels come equipped with a darlington transistor.

Every eight ouput channels share common emitters and integral suppression diodes

for inductive load, activated by connecting PCOM to VDD. If the external voltage

source (5~40 V) is connected to each isolated output channel (IDO) and its isolated

digital output turns on (200 mA max./ch), the card's current will sink from the external

voltage source. The current through EGND should not exceed 2.4 A. If the current for

all channels combined exceeds 2 A, CN5 must be connected to the external ground

to share the extra current. The following figure shows how to connect an external out-

put load to the card's isolated outputs.

Figure 3.7 Isolated Digital Output Connection

ECOM

EGND

Isolated

Circuit

Internal

Wet

contact

Dry

Contact

IDI0

IDI1

External

Internal External

IDO0

IDO1

IDO2

IDO3

IDO4

IDO5

IDO6

IDO7

EGND

Isolated

Circuit

PCOM

Relay

Common

Diode

VDD

5~40V

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 53 54

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