Power supplies SITOP power LOGO!Power Catalog K T 10.1 2004

DC UPS
SITOP power · Standard 24 V
Uninterruptible power supplies
■ Overview
By combining a DC UPS module with at least one 24 V battery
module and a SITOP power supply unit, longer power failures
can be bridged without any interruption.
This combination is used, for example, in machine tool manufacture,
in the textile industry, with all types of production lines and
filling systems, and in conjunction with 24 V industrial PCs. The
negative effects which frequently result from power failures can
thus be prevented.
For nonstop use in the event of power failures, Siemens offers
the uninterruptible power supplies
• DC UPS 6 A
• DC UPS 15 A
• DC UPS 40 A
as well as the battery modules
• 1.2 Ah
• 3.2 Ah
•7 Ah
•12 Ah
• 2.5 Ah (high-temperature battery).
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■ Selection table for battery modules with power failure buffer times
Load current Battery module 1.2 Ah Battery module 3.2 Ah Battery module 7 Ah
(6EP1935-6MC01) (6EP1935-6MD11) (6EP1935-6ME21)
Note:
• The power failure buffer times are based on the discharge period
of the completely charged battery module down to a battery
voltage of 21 V; ambient temperature 25 °C.
• With the DC UPS 40 A module, high electronically limited peak
currents (120 A for approx. 12 ms, up to 40 A for several minutes
depending on the battery capacity) are automatically delivered
in the event of increased load current requirements
(e.g. when switching on incandescent lamps, contactors with
DC autotransformer winding, DC motors, DC/DC converters,
electronic modules with high input capacitance). To achieve
this, at least two battery modules of 7 Ah or more must be connected
in parallel.
Battery module 12 Ah
(6EP1935-6MF01)
1 A 30 min 2.5 h 6 h 10 h 2 h
2 A 11 min 45 min 2.5 h 4 h 45 min
4 A 2 min 20 min 45 min 2.5 h 20 min
6 A 1 min 10 min 30 min 1 h 13 min
8 A - 4 min 20 min 40 min 9 min
10 A - 1.5 min 15 min 30 min 7 min
12 A - 1 min 10 min 25 min 5.5 min
14 A - 50 s 8 min 20 min 4.5 min
16 A - 40 s 6 min 15 min 4 min
20 A - - 2 min 11 min -
Battery module 2.5 Ah
(6EP1935-6MD31)
• Following a power failure, the battery module is automatically
disconnected from the loads electronically and rapidly recharged
at 0.2/0.4 A (DC UPS 6 A module), at 0.35/0.7 A
(DC UPS 15 A module) or at 2 A (DC UPS 40 A module) (V/I
characteristic with 27 V or 27.3 V end-of-charge voltage).
■ DC UPS software
The DC UPS 6 A and 15 A modules are optionally available with
a serial interface or USB interface. All relevant messages concerning
the status of the DC UPS can then be sent to a PC (e.g.
SIMATIC PC). The SITOP DC UPS software, with which the signals
sent from the DC UPS module can be processed further on
the PC, is very easy to use. In monitoring mode, the statuses of
the DC UPS module are visualized on the PC. The safe shutdown
in the event of a power failure and the automatic restart of the PC
are supported. It is also possible to freely define the responses
to the various operating states of the DC UPS module, permitting
extremely flexible incorporation into many different applications.
The software executes under the WinNT 4.0, Win2000 and
WinXP operating systems. It is available as freeware on the
SITOP Internet site for free downloading.
Monitoring and configuration windows of the SITOP UPS software
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Siemens KT10.1 · 2004