Omega Vehicle Security USB-4761 - Manual (Page 30)

3.3 Isolated Digital Input Connections
3.3.1 Single-ended Channel Connections
USB-4761 has 8 isolated digital input channels. Each of isolated digital
input channel accepts 10~30 V
DC
voltage inputs, and accept bi-direc-
tional input. It means that you can apply positive or negative voltage to an
isolated input pin (Vin ). The figure below shows how to connect an
external input source to one of the card's isolated input channels.
Figure 3.2: Isolated Digital Input Connections
3.4 Relay Connections
After power on, the initial relay output status is shown as below:
Figure 3.3: Relay Output Channel Connections
25 Chapter 3