Figure 3.6 Isolated Di Connection; Figure 3.7 Isolated Digital Output Connection - Advantech PCI-1730 User Manual

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.
Wet
contact
Dry
Contact
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.
Isolated
Circuit

Figure 3.7 Isolated Digital Output Connection

External
IDI0
ECOM
IDI1
EGND

Figure 3.6 Isolated DI Connection

Internal
Diode
PCOM
IDO0
IDO1
IDO2
IDO3
IDO4
IDO5
IDO6
IDO7
EGND
25
Internal
Isolated
Circuit
External
Common
NC
NO
Relay
VDD
5~40V
PCI-1730/1733/1734 User Manual