Mounting and options
3.7 Options
S-1FK7 DYA G2 synchronous motors with planetary gearbox
Operating Instructions, 05/2018, A5E44881183B AA
41
Table 3- 2
Technical data of the holding brakes used for 1FK7 motors
Motor type
Holding torque
at 120 °C
M
4
/ Nm
Dyn. braking
torque
M
1(m) 1)
/ Nm
DC current at
20 °C
I
/ A
Opening time
with varistor
T
0
/ ms
Closing time
with varistor
t
c1
/ ms
Highest braking
energy
W
/ J
1FK703⃞
1.9
1
0.3
50
30
40
1FK704⃞
4
3
0.5
70
30
150
1FK706⃞
13
8.5
0.8
100
50
380
*) (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
Current magnitude
t
Time
t
0
Opening time
t
c1
Closing time
A
Brake open
Figure 3-2
Time-related terminology for holding operation
Holding torque M
4
The holding torque M
4
is the highest possible torque that can be applied to the closed brake
in steady-state operation without slip (holding function in a no-current state).
Dynamic braking torque M
1 m
The dynamic braking torque M
1
is the lowest average dynamic braking torque that can occur
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-
) of the 1FK7 G2 motor
