Bosch REXROTH MAD S6 Serie Manual De Instrucciones página 91

IndraDynA_ATEX
Connection specifications
Grounding
Danger of corrosion
Emergency stop
Pressure loss / temperature rise
Other environmental influences
Control of the brake
DOK-MOTOR*-IDYN*A*ATEX-IB02-D5-P
The motors may only be operated with Bosch Rexroth drive control
devices of the serie IndraDrive. Control devices from other manufacturers
are not permitted. The connector terminals in the terminal box must be
screwed on tightly. Do not disconnect or connect connectors when they
are energized due to the danger of sparking within hazardous areas!
Speed-controlled drive systems contain unavoidable discharge currents
above ground. For this reason the motors have to be grounded over the
motor cable and over a separate ground wire with min. 4mm² cross-
section, as specified in the connection diagram. Check that the position of
the grounded conductor is fixed before commissioning.
If the grounded connector in the motor cable and the second separate
grounded connector on the motor housing are not connected or are
interrupted by corrosion or other defects during their lifetime, the
discharge current flows (as leakage current) over conducting housing
parts. This must be prevented using the measures mentioned above
(ATEX guideline 94/9/EG, Appendix II, Chapters 1.2.3, 1.3.3, and 1.4).
Corrosion of the motor housing due to aggressive substances (such as
certain coolants, lubricants, cutting oils or salt mists) is to be prevented.
Energies stored in the drive device must be discharged or isolated as
quickly as possible when the emergency-stop device is pressed so that
the risk that the danger zone is affected during a malfunction is reduced
(ATEX guideline 94/9/EG, Appendix II, section 1.6.2)
The following options for pressing the emergency stop exist:
• discharge of the energies with an intermediate circuit short-circuit
• disconnect the power to the cables and motors before the transition to
the area subject to explosions in order to isolate the energies from the
area subject to explosions.
If the pressure declines or the temperature rises within the motor to an
unacceptable amount during operation, the motor must be switched off on
all the poles. In this regard, heed the detailed documentation for the
control device.
Observe the application notes in the project planning manual regarding
dangers due to external interference effects, such as...
• Operation only inside the specified ambient conditions,
• Maximum vibration and impact loads
• Protect the ground conductor connection from dirt, corrosion, humidity
and/or aggressive substances, ...
• ...
Internal Motor Brake (if present)
In normal operation, use the brake located within the motor only when at
a standstill and when performing the drive-internal brake check. In these
cases, only low temperatures (<100° C) occur and no sparks are
generated because critical grinding of the brake linings does not occur.
The brake's control mechanism must ensure this function in normal
operation. Under the least favorable installation conditions for the
power supply cables to the brake and under the least favorable load
condition for the power supply, a supply voltage of 24 V +/- 10%
must be supplied to the motor. If a voltage divergence occurs due to a
failure during operation, this failure must be identified and corrected
immediately. The failure can be identified, for example, using a monitoring
device for undervoltage.
Operating Instructions
5-3