Use the specified screws and washers for flange
and foot assembly.
5.2.3 Thermal motor protection
The motor temperature is monitored by two sys-
tems that are operated independently of each
other. The mounted temperature sensor and the
drive-internal temperature model ensure the best
protection of motors against thermal overload.
The threshold values for motor temperature mon-
itoring are contained in the encoder data memory
and are read in and monitored automatically
during the operation with Rexroth controllers.
Threshold values for MS2N motors:
• Motor-warning temperature (140°C)
• Motor-disconnection temperature (145°C)
Motor Temperature sensor
MS2N__-_____-_____-__N__-__ PT1000 (Standard)
MS2N__-_____-_____-__A__-__ KTY84-130 (service
product)
900
1000
1100
1200
1300
1400
1500
1600
1700
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170
Ohm
°C
PT1000
R
Fig. 1: Characteristic curve PT1000
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170
Ohm
°C
KTY84-130
R
max
R
R
min
Fig. 2: Characteristic curve KTY84-130
The output of the motor temperature is
dependent from the selected motor encoder var-
iant. In case of motors with an analog encoder
(A_, B_), the temperature signal is output via the
TP(+) und TP(-) ports in the power connection. In
case of motors with digital encoder (C_, D_, H_),
the temperature signal is transmitted digitally via
the encoder interface (cyclic communication).
The temperature of Rexroth controllers is auto-
matically evaluated via the ACUROlink interface
of the encoder. You will find information about
interface implementation in the manual of the
encoder manufacturer, when using other control-
lers.
Hengstler:
ACURO Encoder AD37 series – Functional Safety
Item number: 2 572 032
5.2.4
Cooling mode
Self-cooling (IC410)
In case of self-cooling motors, the heat dissipa-
tion is realized via natural convection and radia-
tion to the ambient air as well as by heat conduc-
tion to the machine construction.
The specified nominal data is reached at ambient
temperatures of up to 40 °C. Unhindered vertical
convection has to be ensured by a sufficient
distance of 100 mm to adjacent components.
Any usage at increased ambient temperature
(0 ... 60°C) is possible. Please note the details
in⮫ Chapter 8.5 “Derating in case of deviating
ambient conditions” on page 58.
Pollution of the surface of the motor reduces heat
dissipation and can result in thermal overload.
The availability of the system can be increased by
regular checks and cleaning of the motors. Please
ensure access to the motors for maintenance pur-
poses.
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