Analog Input Module User's Manual

Contents
User
’
s manual 3
Contents 1. Overview of the AD368..................................................5
1.1 Overview .......................................................................... 5
1.2 Names and functions .......................................................6
1.3 Internal block deagram..................................................... 9
2. Settings.........................................................................10
2.1 Settings for input signal ranges ..................................... 10
3. Installing and Wiring.................................................... 11
3.1 Installing the module ...................................................... 11
3.2 Wiring.............................................................................12
3.2.1 Terminal arrangement................................................12
3.3.2 How to wire ................................................................ 13
3.3 Application precautions..................................................15
3.3.1 Installing environment ............................................... 15
3.3.2 Wiring precautions .....................................................16
4. Register Configuration................................................17
4.1 I/O registers and buffer memory ....................................17
4.2 Data format ....................................................................20
4.2.1 Analog input data ...................................................... 20
4.2.2 Status 1......................................................................22
4.2.3 Offset calibration data ............................................... 23
4.2.4 Gain calibration data .................................................. 23
Appendix ..............................................................................24
A. Specification................................................................... 24
B. Operation flow................................................................ 25
C. How to calibrate ............................................................. 26
D. How to use +10 V reference voltage .............................. 28
E. Details of the READ instruction...................................... 29
F. AD318/AD328/AD338 ....................................................31