Connection conditions
The motors must only be operated with Rexroth IndraDrive drive control devi‐
ces. Drive control devices of other manufacturers are not permitted.
Connectors
Ignition sparks can occur, when motor connectors are disconnected or con‐
nected under load.
Damage to persons or property by discon‐
necting or connecting energized connectors!
WARNING
●
Connect and disconnect connectors only when they are dry and de-
energized.
●
During operation of the system, all connectors must be securely tight‐
ened.
Grounding
The motors must be grounded via a motor cable and via a second separate
ground conductor with minimum 4 mm² cross section. Check that the position
of the grounded conductor is fixed before commissioning.
If the grounding connector in the motor cable and the second separate
grounding conductor on the motor housing are not connected or are interrup‐
ted due to corrosion or other defects during their lifetime, the discharge cur‐
rent flows (as leakage current) over conducting housing parts. This has to be
prevented with the above-mentioned measures.
Corrosion
Corrosion of the motor housing by aggressive materials (such as certain cool‐
ants, lubricants, cutting oils or salt mists) must be prevented.
Emergency stop
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.
The following options exist for the activation of the emergency stop device:
●
Reduce the energy via an intermediate short circuit.
●
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.
Fan
Operation of MSK motors according to the ATEX Directive 2014/34/EU is on‐
ly allowed without a fan.
Other environmental factors
Observe the application notes in the project planning manual “DOK-MO‐
TOR*-MSK*EXGIIK3-PR⃞⃞-⃞⃞-P” regarding dangers due to external inter‐
ference effects, such as ...
●
Operation only inside the specified ambient conditions
●
Maximum vibration and impact loads
●
Protection of protective conductor connections against dirt, corrosion,
moisture and/or aggressive materials, etc.
●
...
1.5
Holding brake
In normal operation, use the optional holding brake only when at a standstill
and when performing the drive-internal brake check. In these cases, only low
temperatures (T < 100 °C) exist and no sparks are generated because critical
sliding of the brake linings does not occur.
Brake control
The voltage supply of the holding brake has to be designed so as to guaran‐
tee under the worst installation and operation conditions that a sufficient volt‐
age is available at the motor in order to release the holding brake. (Please
Bosch Rexroth AG
DOK-MOTOR*-MSK*EXGIIK3-IT04-EN-P
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MSK Motors Operation in Potentially Explosive Areas ATEX Directive 2014/34/EU
Instructions
