STATUS SCIENTIFIC CONTROLS MCU3 - Default Chapter; Table of Contents

STATUS SCIENTIFIC CONTROLS
MCU System Installation and Hardware Configuration Manual
1 Introduction ........................................................................................................................ 1-1
1.1 MICROCONTROLLER MODULE ......................................................................................... 1-5
1.2 INPUT MODULE .............................................................................................................. 1-6
1.3 DISTRIBUTION BOARD .................................................................................................... 1-7
1.3.1 Field Connections ................................................................................................... 1-7
1.3.2 Distribution Board - Issues 1 & 2 ............................................................................ 1-8
1.3.3 Distribution Board - Issues 3 and above ................................................................. 1-8
1.4 COMMON RELAY MODULE .............................................................................................. 1-9
1.5 POWER SUPPLY MODULE ............................................................................................. 1-10
1.6 BATTERY BACKUP........................................................................................................ 1-11
1.6.1 Calculation Examples ........................................................................................... 1-12
1.6.2 Calculating the backup time for your system ........................................................ 1-13
1.7 MCU SYSTEM COMMUNICATIONS ................................................................................. 1-14
1.7.1 MCU System Configuration and Interrogation ...................................................... 1-14
1.7.2 MCU System Networking ...................................................................................... 1-14
2 MCU Installation ................................................................................................................. 2-1
2.1 SITING THE MCU ........................................................................................................... 2-1
2.2 ASSEMBLING ................................................................................................................. 2-2
2.3 SYSTEM WIRING ............................................................................................................ 2-2
2.4 POWER SUPPLY INPUT ................................................................................................... 2-2
2.4.1 A.C. Mains Connection ........................................................................................... 2-2
2.4.2 24V DC Connection ................................................................................................ 2-3
2.5 CABLE ROUTING ............................................................................................................ 2-3
2.6 CABLE SCREENING ........................................................................................................ 2-3
3 Gas Detector Head Installation ......................................................................................... 3-4
3.1 SITING THE DETECTORS ................................................................................................. 3-4
3.2 INSTALLATION IN A NON-HAZARDOUS AREA .................................................................... 3-4
3.3 INSTALLATION IN A HAZARDOUS AREAS ........................................................................... 3-6
3.3.1 Hazardous area installation using barrier type FGDIO ........................................... 3-7
3.3.2 FGDIO Intrinsically Safe Output Module Installation .............................................. 3-9
3.3.3 Hazardous area installations using Proprietary Safety Barriers. .......................... 3-11
4 Input Module Configuration .............................................................................................. 4-1
4.1 INPUT CONFIGURATION .................................................................................................. 4-1
4.1.1 Status Scientific Controls Gas Detectors ................................................................ 4-2
4.1.2 Alternative Detector Heads ..................................................................................... 4-7
4.2 ANALOGUE OUTPUT CONFIGURATION ........................................................................... 4-11
4.2.1 4-20mA Current Source ........................................................................................ 4-12
4.2.2 4-20mA Current Sink ............................................................................................ 4-12
4.2.3 1-5V Voltage Output ............................................................................................. 4-12
4.3 INPUT MODULE INSTALLATION ...................................................................................... 4-13
5 Detector Head Operation & Calibration ........................................................................... 5-1
5.1 DETECTOR HEAD VARIANTS ........................................................................................... 5-1
5.2 OPERATION ................................................................................................................... 5-1
5.2.1 Status Indications .................................................................................................... 5-1
5.3 INSPECTION AND MAINTENANCE ..................................................................................... 5-2
5.3.1 Calibration Intervals ................................................................................................ 5-2
5.3.2 Routine Inspection .................................................................................................. 5-2
5.4 CALIBRATION ................................................................................................................. 5-2
5.5 GAS DETECTOR CONTAMINANTS .................................................................................... 5-2
5.5.1 Flammable Gas Detectors ...................................................................................... 5-2
5.5.2 Oxygen Gas detectors ............................................................................................ 5-3
5.5.3 Toxic Gas Detectors ............................................................................................... 5-3
5.6 SENSOR DISPOSAL ........................................................................................................ 5-4