Siemens simovert masterdrives Betriebsanleitung Seite 182

Connecting-up
X533 - Safe stop
option
DANGER
NOTE
7-16
Using the "safe stop" option, it is possible to interrupt the gating signals
to the power section by means of a safety relay. This ensures that the
unit will definitely not generate a rotating field in the connected motor.
Even if the control electronics generates trigger commands, the power
section cannot move the motor.
The "safe stop" function is a "device for the prevention of unexpected
starting" in accordance with EN 60204-1, Section 5.4, and meets the
requirements of Safety Category 3 to EN 954-1 by virtue of appropriate
external protective circuitry.
The "safe stop" function does not electrically isolate the motor from the
power section, i.e. the motor terminals are still at hazardous voltage
when the function is active!
The safe stop function is not suitable for bringing a rotating motor to a
quick halt as by de-energizing the trigger signals, the motor is only
braked by the connected load.
The motor cannot produce a torque when the "safe stop" function is
activated. Where external forces are applied to the drive axes or with
drives that are not self-arresting (e.g. vertical axes), additional holding
devices, e.g. brakes, are required.
A residual risk cannot be precluded in the case of two simultaneous
errors in the power section. In this case, the drive can be aligned by a
small angle of rotation (asynchronous motors: Max. 1 slot pitch in the
remanence range, corresponding to about 5° to 15°).
The products described here have been developed to perform safety-
related functions as part of a complete system or machine. A complete,
safety-related system generally includes sensors, evaluation units,
signaling devices and strategies for safe shutdown. The manufacturer
of an installation or machine is responsible for providing an appropriate
overall safety system. Siemens AG, its regional offices and associated
companies (referred to as "Siemens" below) cannot guarantee all the
characteristics of a complete installation or machine that has not been
designed by Siemens.
Siemens shall not be liable for recommendations that are made or
implied as a result of the following description. No new warranty or
liability claims over and above those stated in the Siemens general
delivery conditions can be inferred from the following description.
6SE7087-6KP60
Operating Instructions SIMOVERT MASTERDRIVES
06.2005
Siemens AG