Communication Topology; Vlt; Motor Selection Considerations; Motor Grounding - Danfoss VLT ISD 510 Design Manual

System Integration
AUX Feed- Power Cable
voltage in ISD length
(V) cable [W] [m]
(m)
8 0.5
8 1.0
8 2.0
8 4.0
8 6.0
10 0.5
48 25 10 1.0
10 2.0
10 4.0
10 6.0
13.8 0.5
13.8 1.0
13.8 2.0
8 0.5
8 1.0
8 2.0
8 4.0
8 6.0
10 0.5
48 40 10 1.0
10 2.0
10 4.0
13.8 0.5
13.8 1.0
13.8 2.0
13.8 4.0
Table 4.13 48 V Auxiliary Supply
The maximum power loss on the cable is 260.4 W when
40 m feed-in cable is used (the servo drives draw 13.8 W
and 27 servo drives are connected with 2 m loop cables).
The nominal power of the servo drives is 27 x 13.8 W
= 372.6 W. The AUX power supply must provide 70% more
than the nominal power.
MG36C102
Design Guide
Number Overall Overall
of servo cable power
drives length (cable
[m] losses
included)
[W]
32 41.0 287.5
32 57.0 293.1
32 89.0 307.1
18 97.0 157.1
12 97.0 101.3
32 41.0 374.0
32 57.0 383.6
32 89.0 414.9
18 97.0 201.9
12 97.0 128.6
32 41.0 547.2
32 57.0 602.2
30 85.0 637.0
32 56.0 303.4
32 72.0 311.6
30 100.0 299.9
15 100.0 130.5
10 100.0 84.4
32 56.0 406.3
32 72.0 424.3
30 100.0 415.6
15 100.0 167.6
31 55.5 644.0
30 70.0 650.6
27 94.0 633.0
15 100.0 243.7
Danfoss A/S © 08/2017 All rights reserved.

4.5.2 Communication Topology

The maximum cable lengths are defined in Table 4.14.
Cable
Feed-in cable
Loop cable
Encoder cable
Brake cable
Fieldbus extension cable
24/48 V IN connector cable
Table 4.14 Maximum Cable Lengths
1) Maximum total length for each line: 100 m.
2) Maximum length to next port: 100 m.

4.6 VLT

®
Integrated Servo Drive ISD 510

4.6.1 Motor Selection Considerations

Danfoss offers 128 different servo variants, allowing
selection of the most appropriate servo drive for the
application. Table 4.15 shows the available options. Refer to
chapter 5 Typecode and Selection and chapter 6 Specifi-
cations for the ordering code and a detailed explanation of
the available options.
Control
Motor option
electronics
• •
Torque/speed range Fieldbus
•
Mechanical holding
brake
•
Feedback
•
Shaft seal
Table 4.15 Available Options for the Servo Drive

4.6.2 Motor Grounding

To ensure electrical safety, minimize EMC disturbances and
ensure good thermal behavior, the servo drive must be
grounded properly using the following 2 methods:
•
Via the PE wire of the feed-in or loop cable.
•
Via the servo drive flange.
Ensure that the machine frame has a proper electrical
connection to the flange of the servo drive. Use the front
side flange surface. Ensure PE connection on that part of
the machine.
Refer to chapter chapter 4.3.2.3 Grounding for Electrical
Safety for more information.
Maximum length
1)
40 m (shielded)
1)
25 m (shielded)
25 m (shielded)
4
20 m (shielded)
2)
2 m
3 m
Servo drive version
•
Standard servo
drive
•
Advanced servo
drive
47
4