Danfoss VLT ISD 511 Operating Manual page 135

VLT® Servo Drive System ISD 511
Operating Guide
11.4 Motor Overload and Overtemperature Protection
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A sensor which measures motor windings temperature is integrated in the motor of the ISD 511 servo drive. This issues a
warning/error (0x4210) if motor overheating is detected. This prevents motor overheating in case of overloads.
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In addition to the sensor, a second protection mechanism is integrated, which protects the motor even in case of sudden
overloads. As local temperature hotspots cannot be detected during a sudden overload event, they are evaluated via soft-
ware by simulating the physical motor model.
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The combination of both measured temperature and evaluated local hotspot warnings provides protection against motor
overheating.
11.5 Allowed Forces on the ISD 511 Servo Drive
Fr: 250N
Fa: 800N
Illustration 76: Allowed Forces
The maximum axial and radial load while assembling the motor and for any mechanical device connected to the shaft, must not
exceed the values shown in Table
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The bearing could be permanently damaged if the maximum allowed forces are exceeded.
Table 115: Maximum Load Ratings
Maximum radial force (Fr) in N
ISD 511 250 N
The maximum radial load ratings are based on the following assumptions:
• The servo drives are operated with peak torque of the longest member of the frame size.
• Fully reversed load is applied to the end of the smallest diameter standard mounting shaft extension.
• Infinite life with standard 99% reliability.
• Safety factor = 2
11.6 Connectors on the System Modules
11.6.1 Backlink Connector
The backlink connector is at the top of the backside of all the system modules.
Danfoss A/S © 2023.08
N O T I C E
115. The shaft must be loaded slowly and in a constant manner: Avoid pulsating loads.
N O T I C E
Maximum axial force (Fa) in N
800 N
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Specifications