Bosch Rexroth MS2S Operating Manual page 27

MS2S
Technical data holding brakes
Type
MS2S03-B0BYN-____1-_____-__
MS2S03-C0BYN-____1-_____-__
MS2S04-B0BTN-____1-_____-__
MS2S04-C0BTN-____1-_____-__
MS2S05-B0BTN-____1-_____-__
MS2S05-C0BTN-____1-_____-__
Tolerance ± 10%, measured on terminal or junction of the motor
1)
Fig. 2: Switching times of static hold mode
t Connection time (close)
1
t Disconnection time (open)
2
Energy saving function (Eco mode) for
holding brakes
Decrease brake voltage
The control voltage of the holding brake in MS2S
holding brakes can be reduced after executing
the switching operation "Open brake". By
decreasing the control voltage, energy can be
saved of up to 50% and the self-heating of the
motor can be reduced.
To decrease the control voltage of MS2S holding
brakes, the following conditions apply:
•
Maximum decrease of control voltage to U
17 V
•
Waiting time after releasing the holding brake
is at least 200 ms
•
Decreasing the control voltage by voltage
control or pulse width modulation with a
PWM cycle frequency ≥ 4 kHz
R911410077, Edition 01
Holding Rated Rated cur-
torque voltage rent
1)
M4 U I
N N
Nm V A
1.50 24 0.31
1.50 24 0.31
3.50 24 0.35
3.50 24 0.35
7.20 24 0.60
7.20 24 0.60
N
Maximum Maximum
connection disconnec-
time tion time
t t
1 2
ms ms
20 60
20 60
30 85
30 85
30 120
30 120
Latest amendment: 2020-11-18
Remark: Refer to the instructions in the con-
trol module documentation.
Refer to the notes for dimensioning of the cable
length and cable cross-section of brake cables.
Properties
The permanent magnet holding brakes optionally
used in MS2S motors operate according to the
closed-circuit principle. Non-operative holding
brakes are closed and open when reaching the
release voltage. To ensure safe functioning of the
brake, the rated voltage at the brake (24 V DC
±10%) has to be ensured. Please note the instal-
lation conditions such as ambient temperature,
cable length, cable cross-section and the laying
type.
The holding brake is used to hold the motor shaft
in case of motor standstill. Using the operating
brake to decelerate the rotating motor is not per-
missible.
Holding brakes safety instructions
The spring force brake of MS2S motors is no
safety brake. This means, a torque reduction by
non-influenceable disturbance factors can occur.
Especially for use in vertical axes.
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Features and functions
Moment of Maximum
inertia of the switched
holding brake energy
J W
br max
kg*m J
2
0.0000018 120
0.0000018 120
0.0000075 200
0.0000075 200
0.0000230 500
0.0000230 500
Bosch Rexroth AG