Siemens SIMODRIVE 611 Planning Manual page 45

05.01
Fig. 2-8
If a line supply fault is displayed at the NE module or if the yellow LED is dark,
after the line supply and the line fuse have been checked, the overvoltage
limiting module should be checked and if required, replaced.
Procedure
1. Power down the equipment and bring it into a no–voltage condition.
2. Withdraw the overvoltage limiting module and insert connector X181 on
Note
A defective overvoltage limiting module indicates high overvoltage spikes in the
line supply. The line supply should be investigated as to the reason for these
voltage spikes.
Notice
If a system high voltage test is made, the overvoltage limiting module must be
removed in order to prevent the voltage limiting responding.
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
Overvoltage limiting module
the NE module. If the NE module is not functioning correctly, then the over-
voltage limiting module is defective and must be replaced. Otherwise, check
the module group.
2 System Configuration
2.7 Infeed modules
2-45
2