Specifications
Industrial PC
DC UPS uninterruptible power supplies
Introduction
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Siemens ST PC · November 2008
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Overview
Selection table for battery modules and line-buffering times
Important information for selecting the battery capacity:
• On determining the mains buffering times the duration of dis-
charge was based on a non-aged and fully charged battery
module with an accumulator temperature of not less than
+25 °C up to a dip in the battery voltage to 21 V;
• As a result of aging of the accumulators, the available accu-
mulator capacity is reduced throughout the life of the battery
to approx. 50% of the original capacity;
• To achieve the longest possible service life of the accumula-
tors, the battery modules should be stored for only very short
periods, always fully charged and in the temperature range
0 to +20 °C;
• In the case of the DC UPS module 40 A, at least 2 battery
modules with a minimum of 7 Ah must be switched in parallel.
It is important to ensure here that the accumulators are of the
same capacity and age.
• For important configuration notes see Catalog KT 10.1.
Selection table SITOP UPS500S (optionally with capacitor module) and line-buffering times
Important information for selecting the energy storage:
The mains buffering times are based on the discharge period of
new or non-aged, fully charged capacitors. In case of enduring
ambient temperature of + 50 °C we must reckon with a loss of
capacity of ca. 20 % after a service life of 8 years.
Load current
Battery module 1.2 Ah
(6EP1935-6MC01)
Battery module
3.2 Ah
(6EP1935-6MD11)
Battery module
7Ah
(6EP1935-6ME21)
Battery module
12 Ah
(6EP1935-6MF01)
Battery module
2.5 Ah
(6EP1935-6MD31)
1 A 30 min 2.5 h 6 h 11 h 2 h
2 A 11 min 45 min 2.5 h 5 h 45 min
3 A 4 min 25 min 1.5 h 3 h 30 min
4 A 2 min 20 min 45 min 2 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 –
Load current
SITOP UPS500S
(DC UPS basic unit
15 A 2.5 kWs)
SITOP UPS500S
(DC UPS basic unit
15 A 5 kWs)
SITOP UPS500S
(DC UPS basic unit
15 A 2.5 kWs) with SITOP
UPS501S (capacitor
module 5 kWs)
SITOP UPS500S
(DC UPS basic unit
15 A, 5 kWs) with SITOP
UPS501S (capacitor
module 5 kWs)
6EP1933-2EC41 6EP1933-2EC51 6EP1935-5PG01 6EP1935-5PG01
0.2 A 217 s 395 s
0.5 A 134 s 236 s 390 s 478 s
0.8 A 90 s 167 s 266 s 346 s
1 A 110 s 205 s 311 s 425 s
2 A 54 s 120 s 158 s 223 s
3 A 26 s 52 s 82 s 106 s
4 A 19 s 39 s 61 s 81 s
5 A 15 s 31 s 49 s 65 s
6 A 12 s 26 s 40 s 55 s
8 A 8 s 18 s 29 s 40 s
10 A 6 s 15 s 23 s 32 s
12 A 4 s 12 s 19 s 26 s
15 A 3 s 9 s 14 s 20 s
© Siemens AG 2009