Siemens SIRIUS Configuration Manual page 20

Cable-operated switches
4.10 Mounting
No allowance for elongation of the wire by stretching or deformation of the wire eye is
included in the values.
You will find permissible wire lengths and preloads in the table below:
3SE7120
L1 wire length (max.) 5 m
L2 wire support 3 m
(max.)
Actuator travel 11 cm
Preload 55 N / 100 N
Actuating force 38 ... 60 N (max. 200 N / EN 60947-5-5)
1)
Since spring forces are subject to tolerances, the specified actuating forces are guide values only.
1)
When using one tension spring
2)
When using two tension springs
3)
Note
Large temperature fluctuations require corresponding tension springs. The specified values
are valid when the switches are installed at an ambient temperature of 20 °C.
For reliable connection using simplex and duplex terminals, the PVC sheath must be removed
from the clamping area of the steel wire. With the U-clamp (single) terminal, it does not
matter whether it is sheathed or not. When using oval clamps, the sheathing must not be
removed. Bowden wire supports must be used at the recommended intervals.
20
3SE7150 3SE7140
20 m 50 m
3 m 5 m
11 cm 13 cm
200 N 295 ... 390 N
3SE7140-1BD00
3SE7140-1BD04
3SE7140-1CD00
3SE7140-1BF00
+ 1 x
130 m
2)
5 m
13 cm
295 ... 390 N
Cable-operated switches and foot switches
Configuration Manual, 09/2020, A5E43902195002A/RS-AA/001
3SE7141 3SE7160
+ 2 x
75 m 2 x 100 m
5 m 4 m
20 ... 22 cm 32 ... 40 cm
100 N 45 ...60 N
3)