User Manual 08/2003 Edition

02.99 08.03
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition
2.2 Electrical system requirements
All of the power supplies must have ”protective separation”.
When using SIMODRIVE POSMO A in UL-certified plants and machines,
a UL-certified varistor, with the following parameters must
be used in the supply cable.
24 V ––> VN = 31 V DC, Imax = 2000 A
e.g. SIOV-S20-K25 from EPCOS
48 V ––> VN = 65 V DC, Imax = 6500 A
e.g. SIOV-S20-K50 from EPCOS
2.2.2 DC power supply (24 V, 48 V)
General
information on the
power supply
Line
supply
Contactor
400 V
24 V / 48 V
DC-PMM
SIMODRIVE
POSMO A
The load power supply must be dimensioned as a function of the number
of positioning motors SIMODRIVE POSMO A and the coincidence
factor.
Note
If possible, the load power supply should be switched–in/switched–out
on the primary side.
If this cannot be implemented for circuit–related reasons, a Power
Management Module (DC-PMM) must be connected between the
switching element and SIMODRIVE POSMO A, refer to Chapter 2.2.3.
Switching–in and switching–out the 24 V / 48 V load power supply
on the primary side (line–specific)
e.g. SITOP
Optional, according to Chapter 2.2.3
. . .
Fig. 2-2 Switching–in and switching–out the 24 V / 48 V on the primary side
2 Installing and Connecting–up
2-27
2