User Manual 08/2003 Edition

2
2 Installing and Connecting–up 02.99 08.03
2.2 Electrical system requirements
Power
Management
Module
(DC-PMM)
2-34
If several axes in a system must brake simultaneously for operational
reasons, e.g. for EMERGENCY OFF or quasi–simultaneous traversing,
a Power Management Module (DC-PMM) must be used to convert the
regenerative feedback energy.
The DC-PMM is connected between the load power supply and the first
SIMODRIVE POSMO A positioning motor.
Fig. 2-9 Power Management Module (DC-PMM)
Type Order No. (MLFB)
DC-PMM/24V 9AL2137-1AA00-1AA0
DC-PMM/48V 9AL2137-1BA00-1AA0
Note:
Operating Instructions in German and English
are provided with the Power Management
Module (DC-PMM).
Functions, features and technical data (examples):
Converting the regenerative feedback energy using an integrated
pulsed resistor with i 2 t monitoring
Regenerative feedback protection
Signals (e.g. ready, fault)
Max. continuous current capacity when motoring: 25 A
Energy consumption when braking: 10 Ws (DC-PMM/24V)
15 Ws (DC-PMM/48V)
Maximum braking power: 40 W
Power–on duration = 300 ms
Duty cycle = 5 s
The maximum number of positioning motors that can be connected to a
DC-PMM depends on the current load capacity, the coincidence factor
of the regenerative feedback and the regenerative feedback energy.
If 1 Power Management Module is not sufficient to convert the braking
energy, then an additional supply line with an additional DC-PMM must
be provided.
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition