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2 Installing and Connecting–Up
2.5 Gearbox selection
2.5.2
Gearboxes for SIMODRIVE POSMO A – 300 W
Modular gearbox,
300 W motor
Table 2-5
System data, modular gearbox with planetary gears
Gearbox
Stage
Step–
type
type
num-
num-
down
down
ber
ratio
i
Gearbox
Without
–
gearboxes
1
1
12
Planetary
Planetary
20
gearbox
gearbox
2
2
35
49
3
120
1) The specified permissible gearbox torque may not be exceeded.
The gearboxes may be briefly subject to higher torques (with associated lower lifetime) (1 – 2 s to start)
(1–stage: 200% continuous torque, 2 and 3–stage: 125% continuous torque) without the gearbox being
destroyed (this has a negative impact on the lifetime).
The gearbox could be destroyed if this limit is exceeded.
The current limits of the positioning motor (P16 and P28) are preset in the factory to prevent destruction
by the torque produced by the motor.
2) Referred to the gearbox rated speed of 3000 rpm.
2-62
For SIMODRIVE POSMO A –300 W, the following gearboxes can be
selected and used according to Table 2-5:
Effi-
ciency
ciency
Permissible
S1
[Nm]
Gearbox
–
–
–
4
0.90
26
7
0.90
26
0.85
36
0.85
42
0.85
44
0.85
44
0.80
100
Notice
The factory default setting of the parameters P16 and P28 for a
factory mounted gearbox must not be increased. After a gearbox
has been changed/replaced, parameters P16 and P28 must be set
again according to Chapter 5.6.3.
Forced rotation acceleration or delay from the outside is permitted only
within the scope of permissible torques.
Due to the run–up time of the gearbox, elevated currents may occur
when commissioning for the first time (grease distribution in the
gearbox).
Reader's note
Additional gearbox data
Dimension drawings of
motors and gearboxes
Gearbox–dependent parameters
Mounting or replacing gearboxes
SIMODRIVE POSMO A User Manual (POS1) – 08/2013 Edition
Torque
1)
Available
briefly
S1
S3
25 %
4 min
[Nm]
[Nm]
[Nm]
–
0.48
0.95
52
1.7
3.4
52
3.0
6.0
45
4.9
9.7
52.5
8.2
16.2
55
14.3
28.3
55
20.0
39.6
125
46.1
91.2
––> refer to Chapter 2.6.2
––> refer to Chapter C.2
––> refer to Chapter 5.6.3
––> refer to Chapter 7.2
E Siemens AG 2013 All Rights Reserved
10.07
02.99
Rated
speed
speed
S3
n
6.25 %
(S1)
4 min
[Nm]
[rpm]
1.9
3500
2)
6.8
750
2)
12.0
429
2)
19.4
250
2)
32.3
150
2)
55.0
86
2)
55.0
61
2)
125.0
25
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