Mechanical Interfaces; Thermal Motor Protection; Cooling Mode - Bosch Rexroth MS2S Operating Manual

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Features and functions
5.2.2

Mechanical interfaces

Dimensions (flange)
ØC
E
D
Type A
☐ Flange
[mm]
MS2S03 58
MS2S04 82
MS2S05 98
1) See dimensions
Use the following screws and washers for flange assembly.
Screws according to DIN EN ISO 4762 or DIN EN ISO 4014. Property class 8.8 The screw lengths
depends on material and installation situation. The specified tightening torque must be ensured.
Table 6: Tightening torque of mounting screws
Screw
Mounting holes ⌀ [mm]
Tightening torque M [Nm] at
A
μ = 0.12
K
Washer
5.2.3

Thermal motor protection

The motor temperature is monitored via a sensor-
based, drive-internal temperature model and
ensures a high level of protection for the 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 MS2S motors are:
Bosch Rexroth AG
B
B C
Length Shaft
[mm] Ø [mm]
1) 9
1) 14
1) 19
M4 M6 M8
4.5 6.6 9
3.0 10.1 24.6
- - yes
ØG
D E
Shaft length Centering
[mm] collar [mm]
20 40
30 50
40 95
•
Motor-warning temperature (140°C)
•
Motor-disconnection temperature (145°C)
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 dis-
tance 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
MS2S
ØF
A
F G
Hole circle Mounting
[mm] holes [mm]
63 4.5
95 6.6
115 9
38.
R911410077, Edition 01