Chapter 4 Operation Theorem; Isolated Digital Input Circuits - NuDAQ PCI-7230 User Manual

4
Operation Theorem

4.1 Isolated Digital Input Circuits

The isolated digital output is an open collector transistor output. The input can
accept voltage upto 24V. The input resisters on PCI-7230/7233 and cPCI-7230
are 1.2K . The connection between outside signal and PCI-7230, cPCI-7230
and PCI-7233 is shown below.
I s o l a t e d I n p u t
1 . 2 K O h m
E I C O M
G N D
I s o l a t e d I n p u t
1 . 2 K O h m
E I C O M
G N D
Figure 3.1 Input circuits of PCI-7230, cPCI-7230 and PCI-7233
Operation Theorem 23