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05.13
06.05
02.99
S
S
S
S
2.2.2
DC power supply (24 V, 48 V)
General
The load power supply must be dimensioned as a function of the num-
information on the
ber of positioning motors SIMODRIVE POSMO A and the coincidence
power supply
factor.
Note
If possible, the load power supply should be switched–in/switched–out
on the primary side.
If this is not possible for technical reasons, a power management
module (DC PMM) must be connected between the switch element
and the SIMODRIVE POSMO A, refer to
S
Line
supply
Contactor
400 V
e.g. SITOP
24 V/48 V
Optional, according to Chapter 2.2.3
DC–PMM
SIMODRIVE
POSMO A
Fig. 2-2
Switching–in and switching–out the 24 V/48 V on the primary side
E Siemens AG 2013 All Rights Reserved
SIMODRIVE POSMO A User Manual (POS1) – 08/2013 Edition
When using a contactor in the load power supply, before opening
the contactor, it must be ensured that the pulses have been can-
celed via PROFIBUS (OFF 1).
All of the power supplies must have "protective separation".
When using SIMODRIVE POSMO A in UL–certified systems, a UL–
certified varistor with the following properties is required in the
power supply cable:
24 V
––>
V
= 31 V DC, I
N
e.g. SIOV–S20–K30 from EPCOS
48 V
––>
V
= 65 V DC, I
N
e.g. SIOV–S20–K50 from EPCOS
This circuit is not required when using the DC–PMM (refer to Chap-
ter 2.2.3).
When using POSMO A – 300 W in the temperature range
–20...0 _C it should be ensured that all of the system components
are certified for this temperature range.
Switching–in and switching–out the 24 V/48 V load power supply on
the primary side (line–specific)
2 Installing and Connecting–Up
2.2 Electrical system requirements
= 2000 A
max
= 6500 A
max
.
Chapter 2.2.3
. . .
2
2-31
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