3.7.3 Bus Segment Requirements
A maximum of 32 eld devices (nodes) can be connected per eldbus segment. Field devices include:
•
Frequency converter, active node.
•
Master, active node.
•
Repeater, passive node.
NOTICE
A repeater represents a node in each of the 2 segments it connects.
Maximum eldbus cable length
Illustration 3.8 Maximum Number of Frequency Converters per Segment
Segment Repeater Active nodes
1 0 32
2 1 62
3 2 92
4 3 122
Table 3.3 Number of Active Nodes per Segment
Transmission
speed
1
segment
[m]
2
segments
[m]
3
segments
[m]
4
segments
[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 100 200 300 400
Table 3.4 Maximum Total Bus Cable Length, including Drop
Cables
Transmission speed Maximum 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
Table 3.5 Maximum Drop Cable Length per Segment
The length statements in Table 3.4 and Table 3.5 are valid
for bus cables with the properties in chapter 3.7.2 Cable
Specications.
Installation
VLT
®
PROFIBUS DP MCA 101
10 Danfoss A/S © 07/2015 All rights reserved. MG33C602
33