Table of Contents
Page
I-E96-301B
iii
SECTION 1 - INTRODUCTION ....................................................................................................1-1
OVERVIEW ..................................................................................................................1-1
INTENDED USER .........................................................................................................1-1
MODULE DESCRIPTION ..............................................................................................1-1
FEATURES...................................................................................................................1-2
INSTRUCTION CONTENT .............................................................................................1-4
HOW TO USE THIS MANUAL .......................................................................................1-4
GLOSSARY OF TERMS AND ABBREVIATIONS .............................................................1-5
REFERENCE DOCUMENTS..........................................................................................1-7
NOMENCLATURE ........................................................................................................1-7
SPECIFICATIONS .........................................................................................................1-8
SECTION 2 - DESCRIPTION AND OPERATION........................................................................2-1
INTRODUCTION ...........................................................................................................2-1
FUNCTIONAL OPERATION ...........................................................................................2-1
BLOCK DIAGRAM ........................................................................................................2-1
Isolation Amplifier..................................................................................................2-2
Input Multiplexer (MUX).........................................................................................2-2
Analog to Digital Conversion ..................................................................................2-2
Microcontroller and Memory ..................................................................................2-3
Cold Junction Reference ........................................................................................2-3
Switch Settings ......................................................................................................2-4
On-Board Indicators ..............................................................................................2-4
SLAVE EXPANDER BUS ...............................................................................................2-4
Slave Expander Bus Interface ................................................................................2-5
Data Values ...........................................................................................................2-5
Termination Units ..................................................................................................2-5
Function Codes......................................................................................................2-5
AUTOMATIC ADJUSTMENTS AND CORRECTIONS.......................................................2-6
Input Processing ....................................................................................................2-6
Point Value Calculation..........................................................................................2-6
Input Calibration ...................................................................................................2-7
Lead Wire Resistance Adjustment ..........................................................................2-7
Cold Junction Compensation .................................................................................2-7
User Gain and Offset Adjustment ...........................................................................2-8
Engineering Units Conversion ................................................................................2-8
Automatic Calibration ............................................................................................2-9
Field Calibration ....................................................................................................2-9
INPUT CALIBRATION ...................................................................................................2-9
SECURITY AND INTEGRITY CHECKS ...........................................................................2-9
Diagnostics Run on Reset ......................................................................................2-9
Diagnostics Run in Diagnostic Mode ....................................................................2-10
Diagnostics Run During Normal Operation ..........................................................2-10
Expander Bus Communication Security ...............................................................2-10
Open Input Detection...........................................................................................2-10
Alarm and Exception Reporting ............................................................................2-10
ON-LINE CONFIGURATION ........................................................................................2-11
LOGIC POWER...........................................................................................................2-11
