United Electronic Industries DNA-AI-208, Руководство пользователя

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DNx-AI-208 Analog Input Layer
Chapter 1 4
Introduction
Tel: 508-921-4600 www.ueidaq.com Vers: 4.6
Date: November 2013 File: AI208 Chap1.fm
© Copyright 2009
United Electronic Industries, Inc.
Figure 1-1 is a photo of the DNA and DNR-AI-208 Layer boards.
Figure 1-1. Photos of DNR and DNA-AI-208 Boards
1.3 Device
Architecture
The DNA/DNR-AI-208 Analog Input Layer board has eight individual analog
input channels. A Block Diagram of the board/layer is shown in
Figure 1-2 .
Figure 1-2 Block Diagram of DNx-AI-208 Device Architecture
1.4 Layer
Connectors
and Wiring
Two D/A converters produce excitation voltages. The first converter drives exci-
tation on even numbered channels, and the second one to odd numbered chan-
nels. Excitation voltage can be switched on and off on a per-channel basis.
When an AI-208 performs continuous acquisition, it applies voltage to the next
channel in the channel list while acquiring the current channel. This technique
gives a channel enough time to settle and limits current consumption and heat
dissipation by the layer.
DB-37 (female)
37-pin I/O connectors
120-pin DNA
Layer Position
bus connector
Jumpers
bus connector
120-pin DNR