Danfoss FC 300 Profibus User Manual

FC 300 Profibus
How to Install
 Cabling
 Cable Lengths and Number of Codes
The maximum cable length allowable in one se
gment is dependent on the transmission speed. The total
cable length includes drop cables if any. A drop cable is the connection from the main bus cable to each
node if a T-connection is used instead of permissible cable length and maximum number of nodes/frequency
converters with 1, 2, 3 and 4 bus segment
s.
Drop cable connection (i.e. T-connection) beyond the cable lengths indicated is not recommended, due to
the increased risk of reflection occurring. Instead, Dan foss recommends direct connection of the FC 300.
Note that a repeater is a node in both of the two segments it connects. The number of frequency converters
is based on a single master system. If there are two or more masters (e.g. PC tools), the number of
frequency converters must
be reduced correspondingly.
Maximum total bus cable length:
Transmission speed 1segment:
32 nodes
(31 VLT)
[m]
2 segments:
64 nodes
(1 repeater, 61 VLT)
[m]
3segments:
96 nodes
(2 repeaters, 91 VLT)
[m]
4segments:
128 nodes
(3 repeaters, 121 VLT)
[m]
9.6-187.5 kBaud 1000 2000 3000 4000
500 kBaud 400 800 1200 1600
1.5 Mbaud 200 400 600 800
3-12 MBaud 100 200 30 0 400
Total drop cable length limit per segment:
Transmission speed Max. drop cable length per
segment
[m]
9.6-93.75 kBaud 96
187.5 kBaud 75
500 kBaud 30
1.5 Mbaud 10
3-12 MBaud None
13
MG.33.C2.02 - VLT is a registered Danfoss trademark

Danfoss FC 300 Profibus Specifications

General

Brand	Danfoss
Model	FC 300 Profibus
Category	DC Drives
Language	English