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WARNINGS
Only properly qualified personnel may work on or around this equipment.
!
The successful and safe operation of this equipment is dependent on proper handling, storage and installation. Correct functioning is also
dependent on the use of SITOP battery modules (e.g. battery modules of type 6EP1935-6MD11, 6EP1935-6MD31, 6EP1935-6ME21or 6EP1935-
6MF01.
The charging current level and the end-of-charge voltage must be adjusted with DIP-switches to the settings recommended under "Technical
Data". Setting incorrect current and voltage values reduces the life of the battery and may cause irreparable battery damage.
CAUTION
Only trained personnel may open the unit. Electrostatically sensitive devices (ESD)
Description and Design
The DC-UPS module 15 is a chassis unit in the SITOP power product range for mounting on a DIN rail of type DIN EN 50022-35x15/7.5.
The modules and the battery modules must be installed in accordance with the applicable DIN/VDE specifications or pertinent regulations in the country of installation
(e.g. VDE 0510 Part2 / EN 50272-2).
In conjunction with the battery module, it buffers a proportion of the load current (max. 6A) of 24V load current supplies in the SITOP range.
Input "Input L+" on the DC-UPS module must be connected to output L+ of the 24V DC power supply unit and input "Input M" to output M of the power supply unit. The
battery module is connected to terminals +Bat and –Bat. The loads to be buffered are supplied via outputs "Output L+" and "Output M" on the DC-UPS module with the
voltage connected to the input. If the 24V DC supply voltage fails or drops below the set cut-in threshold, the battery module, which is maintained at full charge in
continuous supply mode, is connected in to supply the loads.
The battery cut-in threshold, end-of-charge voltage, charging current and the buffering time can be set via DIP-switches. A switch is provided for setting a defined
buffering (stored energy) time with subsequent disconnection of the battery (see Settings).
The operating states of the DC-UPS module 6 are signaled by four LEDs, two floating changeover and one normally-open contacts and a serial interface (6EP1931-
2EC31 only) or USB-interface (6EP1931-2EC41 only) (see Signaling) and the control signal "Remote Timerstart".
Technical Data
Input quantities:
Rated input voltage:
Operating voltage range:
Max. input current at 24V and battery charging:
Max. input current at 24V and charged battery:
Battery current in floating operation:
Max. quiescent current consumption of the battery
Power loss at 24V and battery charging:
Power loss at 24V and charged battery:
Power loss in floating operation:
Settings
Setting the cut-in threshold:
If the input voltage drops below the selected cut-in threshold voltage, the UPS module switches over to floating operation. The loads are then supplied solely by the
battery module. The cut-in threshold is set via three DIP-switches (see page 2 for position) according to table 2 (see page 7).
Setting range: 22.0 to 25.5V DC in 0.5-steps (delivery state: 22.5V DC ± 0.1V), accuracy ± 1.8%
Setting the charging current:
The battery module is charged at a constant current until the selected end-of-charge voltage is reached. The charging operation is then ended. When setting the
charging current, please read the instructions for the relevant battery module in order to select the optimum setting. The charging current is set by one DIP-switch (see
page 2 for position).
Setting range: 0.35A DC ± 0.1A DC or 0.7A DC ± 0.1A DC
Setting the end-of-charge voltage:
The end-of-charge voltage depends on the battery type and on the battery´s ambient operating temperature. Table 1 (see page 7) shows the end-of-charge voltages for
specific battery modules at different temperatures. It is possible to interpolate between these values. The voltage is set by six DIP-switches (see page 2 for position)
according to table 3 (see page 7).
Setting range: 26.3 to 29.2V DC in 0.1V-steps (delivery state: 27.0V DC ± 0.1V for +25°C lead-gel-battery temperature), accuracy ± 0.7%
Setting the operating state ON/OFF:
To prevent the battery from being discharged unintentionally (e.g. when the system power is disconnected), the DC-UPS module can be switched with a DIP-switch (or a
wire jumper (or floating connection) inserted between terminals X2.9 and X2.10) to operating state "OFF" (delivery state). In the "ON" state (DIP-switch closed or
terminals X2.8 and X2.9 connected with a floating normally-open contact (V
specification. In the "OFF" state, the module does not switch over to floating operation when the mains supply is disconnected but remains functional in every other
respect. If the module is switched to "OFF" in floating operation, it stops operating in floating mode.
During normal operation, the polling interval for the ON/OFF setting is appr. 20s.
Setting the buffering time:
The buffering time is set via six DIP-switches (see page 2 for position) as illustrated in Table 4 (see page 7) in 10s-steps from 5s to 635s. By switch 1 (delivery state
max. time) you can choose whether floating operation will be terminated after a prespecified period or when the exhaustive discharge threshold of the battery (=
maximum buffering time) is reached (delivery state: max. buffering time). Using a 6EP1931-2EC31 or 6EP1931-2EC41 the remote signal starts the timer to terminate
after a prespecified period (switch 1 has to be in position Off and switch interruption in position On). Once the battery has been disconnected, there is no way in which
floating operation can be restarted again by altering the switch setting. Only when the input voltage has recovered floating operation can be resumed. The buffering time
is a minimum of 10 minutes until discharge to 20.4V DC with a charged battery module type 6EP1935-6MD11 (3.2Ah) and a load current of 5A. (requires a new battery
modul with a temperature of the battery above +20°C)
Interruption of the output voltage:
By a DIP-switch you can choose if the output voltage is interrupted for 5 s at the end of the buffering time or not (delivery state : no interruption). Using a 6EP1931-
2EC31 or 6EP1931-2EC41 and set "max. time" an interruption is started by the remote signal.
Protective and Monitoring Functions
Reverse polarity protection:
The UPS module is electronically protected against polarity reversal of the input voltage and battery.
Overcurrent and short-circuit protection:
1.05 to 1.4 I
for appr. 80ms at a overcurrent) in normal and floating operations. An internal 16A-fuse (not accessible) protects the module in case of failure. Automatic
N
restart attempts are made appr. every 20s.
Exhaustive discharge protection:
discharge further will reduce their service life and may result in irreparable battery damage. In order to protect the battery against damage, the UPS module is shut down
in store mode and the loads disconnected from the battery as soon as the battery voltage drops below typ. 19V DC (range 19.5 to 18.5V DC) in floating operation.
Battery test:
In order to guarantee reliable floating operation, the battery module must be checked to ensure that it is fully functional. For this reason, the connected
battery module is tested every 4 hours under normal operation. The test is carried out only if the battery has not operated in floating mode or been disconnected within
this 4 hour period. The battery test is not performed for applications in which floating operation is activated regularly at shorter intervals. A defective battery is signaled
by a flashing alarm and must be replaced then.
Siemens AG Österreich, 05/2004
24V DC
22 to 29V DC
16.0A DC
15.1A DC
15.1A DC
appr. 0.3mA
appr. 16.0W
appr. 14.0W
appr. 15.0W
(delivery state: 0.7A DC ± 0.1A DC)
max
The UPS module is protected by an internal current limitation (typ. 25 to 40A for appr. 20 ms at a short-circuit,
Lead-acid batteries may only be discharged down to a certain voltage (exhaustive discharge threshold). Allowing them to
Output quantities:
Rated output DC voltage:
Rated output direct current:
Output current range:
Output characteristic of charging regulator:
The battery module is charged at an adjustable constant current until the
set end-of-charge voltage is reached.
End-of-charge voltage: V
= 26.3 to 29.3V DC
A2
Charging current:
I
= 0.35 or 0.7A DC
A2
= 15V DC, I
= 10mA) ), the DC-UPS module is fully functional according to
max
5 of 8
English
V
= 24V DC
A1
I
= 15A DC
A1
I
= 0 ... 15A DC
A1
SITOP DC-USV-Modul 15
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