ABB AC 800M User Manual page 6

Table of Contents
Fibre Optic Transmission Technology ............................................................................ 42
Section 3 - Fieldbus Topologies
Overview ......................................................................................................................... 57
Fieldbus Topology with RS485 (PROFIBUS DP) .......................................................... 65
Fieldbus Topology with MBP (PROFIBUS PA) ............................................................. 72
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MBP network limits............................................................................................. 35
MBP power and line length calculation............................................................... 36
Adding field devices to the MBP network........................................................... 38
MBP cycle time calculation ................................................................................. 39
PROFIBUS DP/PA Linking Device LD 800P ..................................................... 40
Fibre optics cable type and speed ........................................................................ 42
Fibre optic network limits.................................................................................... 44
Monitoring of the communication quality ........................................................... 45
Basics of fibre optics topology technologies ....................................................... 46
Calculation of transmission delay time TTD ....................................................... 54
Point-to-Point Topology....................................................................................... 59
Line Topology ...................................................................................................... 60
Line Topology with spurs ................................................................................... 60
Tree Topology ..................................................................................................... 62
Star Topology ...................................................................................................... 63
Ring Topology .................................................................................................... 64
Bus length and speed ........................................................................................... 65
Bus termination.................................................................................................... 66
Bus connector ...................................................................................................... 67
Shielding and data line connection ...................................................................... 69
Bus spur lines....................................................................................................... 69
RS485 limits and network design ........................................................................ 70
Bus length and speed ........................................................................................... 73
MBP and intrinsically safe installation ................................................................ 75
Bus termination.................................................................................................... 76
PROFIBUS PA junctions and connectors ............................................................ 77
Shielding and data line connection ...................................................................... 79
3BDS009029R5001 B