SEW-Eurodrive MOVIDRIVE MDA90A-0160-503-X-S00

4
Installation
Electrical installation
Operating Instructions – MOVIDRIVE
®
modular
76
4.6.1 General information
• Take suitable measures to prevent the motor starting up inadvertently, for example
by removing the electronics terminal block X20 on the axis module. Take addi-
tional safety measures depending on the application to prevent possible injuries to
people and damage to machinery.
• SEW‑EURODRIVE recommends to use only closed cable lugs for connection to
the bolts in order to prevent litz strands from escaping.
4.6.2 Permitted voltage systems
Information on the voltage systems Information on permissibility
TN and TT systems – voltage systems with
directly grounded star point.
Use is possible without restrictions.
IT systems – voltage systems with non-groun-
ded star point.
Use is only permitted adhering to
specific measures. The measures
are described in chapter "Use in IT
systems"(→276).
Voltage systems with grounded outer con-
ductor.
This is not permitted.
4.6.3 Use in IT systems
To ensure IT system-capability, the terminal screw shown in the following figure must
be removed from all modules in the axis system.
12924056459
INFORMATION
EMC limit values
No EMC limits are specified for interference emission in voltage supply systems
without a grounded star point (IT systems). The effectiveness of line filters is severely
limited.
The product can cause direct current in the PE conductor. If a residual current device
(RCD) or a residual current monitoring device (RCM) is used for protection in the
event of a direct or indirect contact, only a type B RCD or RCM is permitted on the
supply end of the product.
24748536/EN – 11/2017