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

SITOP power · Standard 24 V
Uninterruptible power supplies
DC UPS module 40 A
■ Overview
• Mounting depth only approx. 65 mm
• Rated output power 480 W with one battery module, 960 W with
two battery modules
• Extremely high efficiency of approx. 99% as result of patented
circuit concept
• Immediate electronic connection of battery as soon as the consumer
voltage or the voltage present between the L+/M terminals
of the DC UPS module falls below a value of 22.5 V DC.
The consumer voltage only drops to 22 V DC for a maximum of
1 ms.
• 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.
• Following a power failure, the battery module is automatically
disconnected from the consumers electronically and rapidly
recharged with a constant current of 2 A (V/I characteristic with
27.3 V end-of-charge voltage).
• Signalling
- Green LED/yellow LED and floating changeover contact for
mains/battery mode
- Red LED and floating changeover contact for buffer readiness
(LED off)/ alarm (LED on)
■ Integration
Mains Main switch Power supply DC UPS module Load
24 V
DC UPS module 40
24 V
SITOP power
3 AC
10 to 40 A
Aux. contact
ON/OFF
Message: mains or
buffer mode
(floating changeover
contact)
Message: buffer
readiness
or alarm/prewarning
prior to switching-off
of battery
9
24 V battery module
G_KT01_EN_00159
Block diagram: Configuration of uninterruptible SITOP power supply 40 A
Siemens KT10.1 · 2004 9/11