34
Isolated Digital Input
Each of the 32 isolated digital input channels accept voltages from 5
to 30 V. Every eight input channels share one external ground.
(Channels 0~7 use ECOM0. Channels 8~15 use ECOM1. Channels
16~23 use ECOM2. Channels 24~31 use ECOM3.) The following
figure shows how to connect an external input source to the card's
isolated inputs.
ECOM
EGND
Isolated
Circuit
Internal
Wet
contact
Dry
Contact
IDI0
IDI1
External
Figure 3-11: Isolated digital input connection