Nuvo-2000+ Series User’s Manual
Copyright © 2013 Neousys Technology Inc. All Right Reserved.
Page 74 of 78
Appendix B Using Isolated DIO
Nuvo-2000+ provides the optional isolated digital DIO for industrial control usage. In this
chapter, we illustrate how to connect cables to isolated DIO channels and the function
reference.
B.1 Wiring for Isolated DIO
The digital input function of Nuvo-2000+ is implemented using a photo-coupler with an
internally series-connected 2.4 k resistor. You need to provide a voltage to specify the
logic high/low state. The input voltage for logic high is 5~24V, and the input voltage for logic
low is 0~1.5V.
The digital output function of Nuvo-2000+ is implemented using Power Analog
Device iCoupler® component. The DO channels are configured as NO (normally-open)
configuration. When you turn on Nuvo-2000+, all DO channels have a deterministic state of
logic 0 (circuit disconnected from GND return). When logic 1 is specified, MOSFET is
activated and GND return path is established. You should configure a sinking current
connection for DO of Nuvo-2000+. The following diagrams are the suggested wiring for DO:
