Despatch MIC1422 Controller - Manual (Page 3)

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TABLE OF CONTENTS
TABLE OF CONTENTS .................................................................................................. iii
SECTION 1: PRODUCT DESCRIPTION ....................................................................... 1
1.1 General .................................................................................................................. 1
1.2 Displays................................................................................................................. 2
1.3 Control................................................................................................................... 2
1.4 Alarms ................................................................................................................... 2
1.5 Process Variable/Setpoint Value Re-Transmission Output .................................... 3
SECTION 2: INSTALLATION AND WIRING.................................................................. 5
2.1 Mounting ............................................................................................................... 5
2.2 Wiring Guidelines .................................................................................................. 7
Installation Considerations ........................................................................................ 7
AC Power Wiring....................................................................................................... 8
Wire Isolation ............................................................................................................ 8
Use Of Shielded Cable.............................................................................................. 8
Noise Suppression At The Source ............................................................................ 9
2.3 Sensor Placement (Thermocouple or RTD) ........................................................ 10
2.4 Input Connections ............................................................................................... 12
2.5 Output Connections ............................................................................................ 17
SECTION 3: OPERATION ........................................................................................... 21
3.1 Control Capability ................................................................................................ 21
3.2 Control Responses............................................................................................... 21
3.3 Direct/Reverse Operation of Outputs .................................................................. 22
3.4 On-Off Control..................................................................................................... 22
3.5 Time Proportioning Control ................................................................................. 22
3.6 Current Proportioning Control ............................................................................. 23
3.7 Power Up Procedure ........................................................................................... 25
3.8 Keypad Operation ............................................................................................... 25
3.9 Front Panel Indicators ......................................................................................... 26
SECTION 4: CONTROL MODE ................................................................................... 27
4.1 Operation ............................................................................................................ 27
4.2 Active Setpoint .................................................................................................... 27
4.3 Override Feature ................................................................................................. 28
4.4 Alarm Status Display ........................................................................................... 28
4.5 Over-Range I Under-Range Display.................................................................... 28
4.6 Manual Control (Percent Output) ........................................................................ 29
4.7 Setup Modes ....................................................................................................... 30
SECTION 5: TUNE MODE........................................................................................... 31
5.1 Tune Mode Description ....................................................................................... 31
5.2 Manual Tuning Method ....................................................................................... 32
SECTION 6: ALARM MODE ........................................................................................ 35
6.1 Alarm Mode Description ...................................................................................... 35
6.2 Loop Alarm Enable.............................................................................................. 40
6.3 Loop Alarm Time................................................................................................. 40
6.4 Logical Combination of Alarms ........................................................................... 41