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MKE Synchronous Servomotors
Electrical connection
Bosch Rexroth AG
R911402016, Edition 02
Observe the manufacturer's operating instruc-
tions as well as DIN EN 60079-14 and corre-
sponding regional standards.
Remark:
“Only use suitable Ex cable glands
(Ex-KLE) in accordance with EN 60079-14:2014
Explosive atmospheres. The manufacturer or
machine operator is in the sole responsibility for
project planning, selection and installation of
electric devices (assembly).
A seal in accordance with EN
IEC 60079-0 must
be used between the Ex-KLE and the terminal box
cover to ensure the necessary IP protection of the
motor in accordance with EN 60079-31.
Remark:
Flat gaskets or O-rings must be used
to ensure suitable sealing of the Ex-KLE to the
motor housing (IP protection).
Use shielded connection lines. The shield con-
nection -X5 for encoder and power cables is
located in the terminal box lid.
The protective conductor connection is made via
the protective conductor routed in the power
cable in the terminal box of theMKE-Motoren.
An additional connection of a protective or equi-
potential bonding conductor is mandatory for Ex
motors according to EN
IEC 60079-0. MKE-
Motoren must be grounded via the additional
connection part (protective earth terminal on the
motor flange). Ground terminal cross section see
Chapter 8.3.7 “Ground connection”
Connection thermo controller
The motor temperature can be evaluated via
Rexroth drive controllers when MKE motors are
used in potentially explosive atmospheres.
The connection of the PTC resistors, for the
motor temperature evaluation, is shown in the
respective connection diagrams of the drive con-
trol units.
WARNING
Risk of explosion due to impermissible tempera-
ture increase in case of faulty temperature evalu-
ation!
The connections [1] and [2] of the PTC resistor
(triplet PTC thermistor) must be connected to
the temperature monitoring of the drive con-
troller! Depending on the drive controller or
third-party converter used, function-tested trip-
ping devices with the II 2 G or II 2 D desig-
nation may be required to evaluate the tempera-
ture sensors.
The maximum permissible surface temperature
of the MKE motors is ≤
135
°C, which corre-
sponds to temperature class T4. The triplet ther-
mistors installed in the MKE motors, in conjunc-
tion with the evaluation circuits of the drive
controllers, ensure reliable and safe overtemper-
ature shutdown.