Switch-Off; Holding Brake; Acceptance Test; Residual Risks - Bosch Rexroth MS2E Manual

MS2E Synchronous Servomotors
4.5.6

Switch-off

Energies stored in the intermediate circuit have
to be reduced or insulated as soon as possible
through the activation of the emergency stop
device, so that in the case of a failure the risk of
an effect into the danger zone is reduced (ATEX
directive 2014/34/EU).
For example, this can be achieved as follows:
•
Reduce the energy via an intermediate short
circuit. For information about the function
"Intermediate short circuit" please refer to
Indradrive documentation. When using for-
eign converters refer to the manufacturer.
•
Isolation of the energies before they are
transferred into the potentially explosive
atmosphere by isolating the voltage of the
lines and motors present in the potentially
explosive atmosphere.
4.5.7

Holding brake

Use the optional holding brake in normal opera-
tion only in standstill time.
Malfunction
Only in an event of fault, i.e. in the case of a
fault in the system, may the brake be activated
when the motor is turning, e.g. in order to pre-
vent a dangerous lowering of vertical axes. In
this case, sparks may be generated in the brake
and increased temperatures may occur within the
motor. When a fault occurs, the operator must
eliminate it immediately.
Functional test
Before commissioning and when operating the
motor periodically, the functions of the brake are
to be tested with a suitable braking test according
to the risk analysis of the plant operator. Further
information and data can be found in the respec-
tive functional descriptions of the drive controller
firmware.
R911387136, Edition 03
Conditions for use of MS2E motors in Equipment Group II, Category 3.
For further general notes about holding
brakes see
on page 36.
4.5.8
Before initial start-up of the system or after
changing a motor, check your installation
with regard to the directives according to
EN IEC 60079-0:2018/AC:2020. The accept-
ance report must confirm compliance with the
instructions and conditions of use given here.
4.5.9
The existing residual risks are to be observed by
the user, when the installation is designed.
•
Overstress
–
When the motor is overloaded, including
cases where errors in the mechanical
or electrical equipment of the machine
cause such overloading, high tempera-
tures may occur that result in explosion
hazards.
•
Operation in explosive dust atmosphere.
–
An operation in explosive dust-atmos-
phere can built a layer on the motor
during a residence time, which does no
longer ensure a sufficient motor cooling.
•
Grounding and discharge currents
–
Variable-speed drive systems cause
unavoidable discharge currents. Please
observe a proper installation of protec-
tive conductor and potential equalization
line. In the case of interrupted protec-
tive conductor and potential equalization
line due to occurring error cases during
operation or faulty connections can raise
sparks on transition points.
•
Temperature control
–
The failure of the single-channel temper-
ature monitor in the device system may
occur, as the result of an error, and might
⮫ Chapter 6.2.8 "Holding brake"

Acceptance test

Residual risks

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