User guide

Table of Contents
System Description, AutroSafe Integrated Fire & Gas Detection System, 116-P-ASAFE-IFG/XE Rev. B, 2005-10-27,
Autronica Fire and Security AS
Page 2
4.4.5 Connections ............................................................................ 22
4.4.6 Connection – current source................................................... 23
4.4.7 Connection – current sink ....................................................... 23
4.5 PowerLoop 4-20 mA Input Unit BN-342/EX...................................... 24
4.5.1 Description .............................................................................. 24
4.5.2 Versions .................................................................................. 24
4.5.3 Overview ................................................................................. 24
4.5.4 Connections ............................................................................ 25
4.5.5 Earthing................................................................................... 25
4.6 AutroFlame Multispectrum Flame Detector X33/1 PL ...................... 26
4.6.1 Description .............................................................................. 26
4.6.2 Applications............................................................................. 26
4.6.3 Connections ............................................................................ 27
4.7 AutroPoint Gas Detector HC300 PL ................................................. 28
4.7.1 Connections ............................................................................ 29
4.8 AutroFieldBus Protocol Converter BSD-321..................................... 30
4.8.1 Description .............................................................................. 30
4.8.2 Overview ................................................................................. 30
4.8.3 Connections ............................................................................ 31
4.8.4 Earthing................................................................................... 35
4.8.5 Typical applications using different signal references ............ 36
4.8.6 Port Isolation on RS-422 ports................................................ 39
5. Projecting Guidelines.......................................................40
5.1 General Recommendations / Planning ............................................. 40
5.2 Technical Overview........................................................................... 40
5.2.1 Limitations - Panels and Loop Units ....................................... 40
5.2.2 Loop data ................................................................................ 41
5.2.3 Cable data............................................................................... 42
5.2.4 Connectivity............................................................................. 43
5.2.5 Power Supply data.................................................................. 43
5.3 Typical System Configurations - Examples ...................................... 43
5.3.1 Floating production, storage and offloading system ............... 43
5.3.2 Offshore platform systems...................................................... 44
5.3.3 Land-based petrochemical system ......................................... 44
5.4 Mounting............................................................................................ 44
5.5 Configuration ..................................................................................... 44
5.6 System Shielding and Earthing ......................................................... 45
5.6.1 Introduction ............................................................................. 45
5.6.2 Definitions ............................................................................... 45
5.6.3 Single Earth Systems – Power Loop ...................................... 46
5.6.4 Dual Earth Systems – Power Loop......................................... 48
5.6.5 Shielding & Earthing AutroFieldBus....................................... 49
5.6.6 Earth Fault Detection AutroFieldBus ...................................... 50
6. PowerLoop Calculator Tool .............................................51
6.1 Introduction........................................................................................ 51
6.2 Operating The PowerLoop Calculator Tool....................................... 52
6.2.1 Loop driver type ...................................................................... 52
6.2.2 Add Button .............................................................................. 52
6.2.3 Insert Row Button ................................................................... 53
6.2.4 Update Row Button................................................................. 53
6.2.5 Delete Row Button .................................................................. 54
6.2.6 Load Config Button ................................................................. 54
6.2.7 Calculate Button...................................................................... 54
6.2.8 Graphical Button ..................................................................... 55
6.2.9 Ambient Temperature ............................................................. 56