Advantech PCI-1720 Bedienungsanleitung Seite 29
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Chapter 5 Signal Connections 25
Figure 5-2: Grounded-load connection for D/A voltage output
Figure 5-3: Differential-load connection for D/A voltage output
5.3 Current Sink Connections
The PCI-1720's current loop output uses a 0 to +5 V (unipolar)
voltage output as each channel’s driving source. Current drive
circuits consist of a power field-effect transistor (FET). The current
output’s voltage bias must be less then 50 V for accurate results. The
card also provides an internal +12 V power source for current loop
excitation.
You can use three types of current sink connections:
1. Grounded load with a floating power supply.
2. Floating load with a grounded power supply.
D/A
Internal Side
V
OUT
AGND
External Side
Grounded
Load
D/A
Internal Side
V
OUT
AGND
External Side
Diff.
Load
with
Ground
- PCI-1720 1
- 4-channel Isolated D/A 1
- Output Card 1
- User's manual 1
- Copyright 2
- Acknowledgments 2
- CE notification 2
- On-line Technical Support 2
- Contents 3
- General Information 5
- 1.1 Introduction 6
- 1.2 Features 6
- 1.3 Applications 7
- 1.4 Specifications 7
- Power consumption 8
- Physical 8
- Environment 8
- 1.5 Block Diagram 9
- 6 PCI-1720 User's Manual 10
- Installation 11
- 2.1 Initial Inspection 12
- 2.2 Unpacking 12
- 2.3 Installation Instructions 13
- Jumpers and 15
- I/O Connectors 15
- 3.1 Jumper Settings 16
- JP1 to JP4 17
- Keeps last status after reset 18
- Loads default while reset 18
- Register Structure 21
- 4.1 Overview 22
- 4.2 I/O Port Address Map 22
- 00 0 to +5 V 24
- 01 0 to +10 V 24
- 1 0 -5 to +5 V 24
- 11 -10 to +10 24
- Signal Connections 27
- 5.1 Overview 28
- 5.3 Current Sink Connections 29
- Internal Side External Side 30
- Calibration 33
- A.1 Overview 34
- Appendix A Calibration 31 35
- A.4 Current Sink Calibration 36
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