Auxiliary Power; Supply - Danfoss VLT ISD 510 Design Manual

System Integration
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1 0 ISD servo drives with brake
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Illustration 4.7 24 V and 10 m Feed-in Cable - 6 Servo Drives
with Brake
Illustration 4.7 shows 2 examples:
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Example I: 7 servo drives are possible with a
cable length of 38 m, and 6 of them can be
equipped with a brake.
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Example II: 11 servo drives are possible with a
cable length of 21 m. No brakes are employed.
At 48 V AUX supply, the voltage drop is not the limiting
factor. The maximum number of servo drives that can be
connected per line is 32. The maximum cable length is
100 m per line.
MG36C102
Design Guide
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Danfoss A/S © 08/2017 All rights reserved.
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1 Connected ISD servo drives
Illustration 4.8 48 V and 10 m Feed-in Cable - Servo Drives
Connected

4.5.1.2 Auxiliary Power

4.5.1.3 24 V Supply
When 24 V AUX supply is used, the power losses on the
cable are limited because only a limited number of servo
drives can be connected. The maximum power loss on the
cable is 6.4 W (when the servo drive draws 13.8 W and 8
servo drives are connected with 0.5 m loop cables). The
nominal power of the servo drives is 8 x 13.8 W = 116.8 W.
The AUX power supply has to provide ≈6% more than the
nominal power.
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