Motor components and options
4.2 Brake
1FT2 synchronous motors for SINAMICS S120
52
Configuration Manual, 03/2021, A5E50645584B AA
Motor
Holding
torque
at 120 °C
Dyn. braking
torque
Rated cur-
rent
Opening
time
1)
Closing time
1)
Maximum
permissible
single oper-
ating energy
2)
Total operat-
ing energy
(service life)
M
4
/ Nm
M
1m
/ Nm
I
n
/ A
t
0
/ ms
t
c1
/ ms
W
max
/ J
W
total
/ kJ
For spring-loaded brake
1FT2
☐
03
1.3
1.3
0.4
90
30
62
5
1FT2
☐
04
3.3
3.3
0.5
110
40
270
35
For permanent-magnet brake
1FT2
☐
05
8
5
0.6
90
25
570
284
1FT2106
16
9
0.7
100
50
1065
774
1FT2206
13
6.5
0.7
100
50
1550
774
1FT2
☐
08-3
19
12
0.8
100
40
2000
1800
1FT2
☐
08-4
1FT2
☐
08-5
32
17
0.9
200
60
4800
2400
1FT2
☐
10-3
32
17
0.9
200
60
6500
2400
1FT2
☐
10-4
1FT2
☐
10-5
55
26
1.0
220
60
8700
3800
1)
Valid for direct connection to S120 and internal switching. For external brake switching, a varistor has to be used.
2)
Maximum three EMERGENCY STOP operations in sequence, maximum 25% of all the emergency stops as high energy
stop with W
max
.
Note
If the brake is switched in two stages (two clicks), the first switching point is decisive for
opening and the second for closing.
I
Current
t
Time
t
0
Opening time
t
c1
Closing time
A
Brake opened
Figure 4-1
Time-related terminology for braking operation
