Page 112
8.14.5 Operation with long motor cables
Compliance with the EMC standard EN 61800-3 is only guaranteed for motor cable
lengths of up to 25 m. For cable lengths beyond this a new measurement of the
interference emission may possibly be required.
In applications involving long motor cables and/or unsuitable motor cables with an inadvertently high
cable capacity, the filters may be thermally overloaded. To avoid such problems we highly recommend
the following procedure for applications that require long motor cables:
With cable lengths of more than 25 m use only cables with a capacitance per unit length between
the motor phase and the shield of less than 150 pF/m!
(Please contact the motor cable supplier, if necessary)
For motor cable lengths of more than 25 m and up to 50 m the following derating applies
regardless of the EMC qualification (see also
Table 8, Technical data: Cable specifications
):
8.14.6
ESD protection
Caution!
Unassigned D-Sub connectors may cause damage to the device or other parts of the
system due to ESD (electrostatic discharge).
To prevent such discharge, protective caps are available (for example Spoerle).
The ARS 2100 SE series servo drives have been designed to provide high interference immunity. For
that reason, some individual functional blocks are electrically isolated. Inside the device the signals are
transmitted via optocouplers.
The following isolated areas are distinguished:
Power module with DC bus and mains input
Control electronics with processing of analogue signals
24 V supply and digital inputs and outputs
Product Manual „Servo drives ARS 2100 SE“
Version 5.0
PWM frequency
up to 5 kHz 5,5 kHz
6 kHz
7 kHz
8 kHz
Max. motor cable length
50 m
45 m
40 m
35 m
30 m
