9
05.01
9.7 Circuit examples =1 to =10 with SIMODRIVE 611 analog
9-280
Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
Circuit example =10 “Power contactors in the motor
circuit FD”
Application
For special applications, the circuits allow the energy feed to the motor from the
drive module to be electrically disconnected through contactors. The contactors
may only be de–energized if the pulses are inhibited >=10 ms using terminal
663 before the power contacts open. When powering up, the pulses must be
enabled at the same time that the power contacts close.
Notice
The contactors are generally not suitable for disconnecting clocked inverter
currents or disconnecting DC currents of a drive which is stationary in closed–
loop position control. If this is not observed when disconnecting, high voltage
peaks can occur which could destroy, the drive module, motor winding and/or
the contactor contacts can weld up.
Functions
The drives are powered down, safety–related a) via the start inhibit and b) addi-
tionally via contactor by electrically isolating from the drive module using key–
actuated switch –S11 through one channel or –S15 through two channels.
The pulse enable is first withdrawn before the power contacts of the power con-
tactor separate with the drop–out delay. The interlocking circuit, terminals
103–104 or terminals 107–108 should be incorporated in the start circuit of the
safety combination =4–K31/Y33–Y34 stop drives.
9 Important Circuit Information
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