Siemens SIMOTICS S-1FT7 - Page 127

Configuration
5.4 Brake resistances (armature short-circuit braking)
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
125
Motor type
External brak-
ing resistor
R
opt
/ Ω
Average braking torque M
Br rms
/
Nm
Max. braking
torque M
Br max
/
Nm
rms braking current I
br rms
[A]
Without external
braking resistor
With external
braking resis-
tor
Without exter-
nal braking
resistor
With external
braking resis-
tor
1FT7084-☐AH7
3.2
4
16
20
30
27
1FT7086-☐AC7
4.0
9
24
30
21
19
1FT7086-☐AF7 2.9 7 24 30 31 28
1FT7086-☐AH7
2.2
5
24
29
44
39
1FT7102-☐AB7
4.3
12
27
34
19
17
1FT7102-☐AC7
2.9
10
27
34
27
24
1FT7102-☐AF7
2.3
7
28
34
38
34
1FT7105-☐AB7
2.4
18
51
63
35
32
1FT7105-☐AC7
2.1
14
5
64
44
40
1FT7105-☐AF7
1.7
10
50
62
60
54
1FT7108-☐AB7
2.2
24
72
89
44
40
1FT7108-☐AC7
1.5
21
72
90
62
56
1FT7108-☐AF7
1.3
16
71
88
83
74
1FT7132-5AB7
2.1
34
89
111
50
45
1FT7132-5AC7
1.6
28
89
111
66
59
1FT7132-5AF7
1.2
21
88
110
97
87
1FT7134-5AB7
1.5
38
115
142
66
59
1FT7134-5AC7
1.5
32
115
142
80
72
1FT7136-5AB7
1.2
49
149
185
88
79
1FT7136-5AC7
1.1
39
149
185
104
93
1FT7138-5AB7
1.0
57
185
230
107
96
NOTICE
Damage to motors caused by incorrect connection
Short-circuiting 1FT713x motors that make full use of thermal class 155 without a series
resistor can cause damage to the motor.
Do not short-circuit the motors without a series resistor.