SITOP Modular: SITOP PSU400M 24 V/20 A - Efficient DC/DC converter for drive and battery systems0 pages

© Siemens AG 2011

SITOP PSU400M 24 V/20 A
Efficient DC/DC converter for drive and
battery systems
August 2011

The compact DC/DC converter enables a costeffective network failure concept at the DC link of
frequency-controlled drive systems. The 20 A
switching power supply uses the kinetic energy of
decelerating motors to buffer the 24 V supply
until the machine has completed a controlled
shutdown. Its high efficiency ensures an
extremely effective use of the energy reserve.
And because the available charge of capacitors is
voltage-dependent, the wide input voltage range
enables particularly high energy generation. In
addition to capacitors, batteries are ideally suited
as a DC source. The high degree of overload
capability, functionality, and robustness of the
DIN rail device permit its use in many applications, even under harsh conditions.

The benefits at a glance
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Wide-range input for 200 to 900 V DC
High energy generation from capacitors
High degree of efficiency up to 96%
Robust and compact design with only
90 mm width
50% "extra power" for connection of loads with
high current demand
Integrated signaling contact "24 V DC OK"
3 LEDs for different operating states
Adjustable startup delay, e.g. for operation at
the DC link of SINAMICS frequency converters
Wide temperature range from -25 to +70 °C
High shock and vibration resistance
Expandable with the following add-on
modules: redundancy module, selectivity
module and DC UPS

SITOP modular
Answers for industry.

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