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Table 3- 2
Technical data of the holding brakes used for 1FK7 motors
Motor type
Holding torque
at 120 °C
M
/ Nm
4
1FK703⃞
1.9
1FK704⃞
4
1FK706⃞
13
*) (m) = averaged value
Note
If the brake is switched in two stages ("click" twice), then when opening, the first switching
point is decisive, and when closing, the second switching point.
I
t
t
0
t
c1
A
Figure 3-2
Holding torque M
4
The holding torque M
in steady-state operation without slip (holding function in a no-current state).
Dynamic braking torque M
The dynamic braking torque M
for EMERGENCY STOP operation.
3.7
Options
Descriptions of the options are provided in the Configuration Manual
(https://support.industry.siemens.com/cs/document/55379345?lc=de-
WW&pnid=13349&dl=en) of the 1FK7 G2 motor
S-1FK7 DYA G2 synchronous motors with planetary gearbox
Operating Instructions, 05/2018, A5E44881183B AA
Dyn. braking
DC current at
torque
M
/ Nm
1(m) 1)
1
3
8.5
Current magnitude
Time
Opening time
Closing time
Brake open
Time-related terminology for holding operation
is the highest possible torque that can be applied to the closed brake
4
1 m
Opening time
20 °C
with varistor
I
T
/ A
/ ms
0
0.3
50
0.5
70
0.8
100
is the lowest average dynamic braking torque that can occur
1
Mounting and options
3.7 Options
Closing time
Highest braking
energy
with varistor
t
/ ms
c1
W
30
40
30
150
50
380
/ J
41
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