Danfoss VLT AutomationDrive FC 302 Installation Manual - Page 12

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Installation

3.7.3 Bus Segment Requirements

A maximum of 32 field devices (nodes) can be connected per fieldbus 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 fieldbus cable length

Illustration 3.8 Maximum Number of Frequency Converters per Segment

Segment

Table 3.3 Number of Active Nodes per Segment

Transmission

speed

9.6–187.5

kBaud

500 kBaud

1.5 MBaud

3–12 MBaud

Table 3.4 Maximum Total Bus Cable Length, including Drop

Cables

VLT

Repeater

Active nodes

segment

segments

[m]

1000

2000

3000

400

800

1200

200

400

600

100

200

300

PROFIBUS DP MCA 101

Transmission speed

9.6–93.75 kBaud

187.5 kBaud

500 kBaud

122

1.5 MBaud

3–12 MBaud

Table 3.5 Maximum Drop Cable Length per Segment

segments

[m]

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

4000

Specifications.

1600

800

400

Maximum drop cable length

per segment [m]

None

MG33C602