9
05.01
9.12 Operation at power failure
9-297
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
In addition to the main contacts, positively–driven auxiliary contacts (NC con-
tacts) of contactor –K1 must be incorporated, in a safety–related fashion, into
the drive control as follows:
An NC contact must incorporated in the feedback circuit of the safety combina-
tion to control the line contactor; a second NC contact must be incorporated in
the feedback circuit of the safety combination for the enable function in the set-
ting–up mode or, alternatively the enable circuit for the setting–up mode.
The NO contact can be processed in the PLC for the contactor energized si-
gnal.
Notice
If the power supply is supplied through P500/M500 at connector X181, it is not
permissible to use a six conductor connection, electronic power supply connec-
tion via terminals 2U1, 2V1, 2W1 in front of the HF commutating reactor, refer
to Section 9.13.
9 Important Circuit Information
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