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WARNING
!
Hazardous voltages are present in certain parts of this electrical equipment during operation.Incorrect handling of the
equipment can result in death, severe personal injury or substantial property damage. Only qualified personnel are allowed to
work on or around this equipment. The successful and safe operation of this equipment is dependent on proper transport,
storage and installation.
Before installation or maintenance work is carried out, the mains switch must be switched off and locked to prevent it from
being switched on again. If these rules are not adhered to, contact with live parts or improper use can result in death or
severe personal injury.
CAUTION
The device may only be opened by qualified personnel. Electrostatically sensitive devices (ESD)
Disposal Guideline
Packaging and packing aids can be recycled and should always be disposed of for reuse.
The product itself shall not be disposed of as normal domestic waste.
Description
The optional mains buffer module is a built-in device belonging to the SITOP series.
The device must be installed taking into account all relevant DIN/VDE specifications and other national standards.
It is used in combination with a stabilized 24 V load power supply unit of the SITOP serie to buffer the load current if the AC power supply is
interrupted temporarily.
The buffer module is connected in parallel with the SITOP load power supply unit. The "+" input of the buffer module must be connected to
the "+" output of the power supply unit for this purpose, and the "-" input of the buffer module to the "-" output of the power supply unit (see
wiring information on page 2). The buffer module must be wired with the same conductor cross-section as the output cable of the power
supply.
Technical data
Input variables
Rated input voltage U
:
e
24 V DC
Operating voltage range:
24...28.8 V
Charging time: appr. 60s
Output variables
Output DC voltage U
: in buffer mode:
a
U
– 1 V
e
Output DC current I
:
a
0 - 40 A
Buffering time :
with 40 A load current: 200 ms
with 20 A load current: 400 ms
with 10 A load current: 800 ms
with 5 A load current: 1.6 s
Using 6EP1437-3BA10, buffering time decreases by
100ms.
The buffering time is longer for smaller load currents.
The maximum possible buffering time is 10 seconds.
Installation
Mounting on a DIN EN 50022-35x15/7.5 standard rail. To ensure adequate cooling, the device must be installed vertically, with the terminals
at the bottom. Be sure to leave a minimum clearance of 50 mm above and below the device.
Connections and terminal assignment
Terminals
Function
Output voltage DC 24 V
1, 2
SIEMENS AG ÖSTERREICH, 07.2013
Protection and monitoring
function
Static current limiting:
typ. 40 A
Signaling:
Green LED: Supply voltage >20.5 V
Reverse polarity protection
Ambient
Temperature
Storage and transport:
-40 to +85°C
Operation:
0 to +60°C
Humidity rating corresponds to climatic category
3K3 acc. to EN60721 Part 3, no condensation
Pollution degree 2
Natural air cooling
Terminal range
Remarks
2
0.33 to 10mm
Screw-type terminals. Use a screw driver with a blade width of 5
AWG 22 to 8
mm. Recommended tightening torque 1.2 Nm.
4/ 8
Specifications
Degree of protection: IP20 acc. to IEC 529
Safety class 1 acc. to IEC 536
Safety acc. to VDE 0160 and VDE 0805
(EN 60950-1): SELV
Emitted interference acc. to EN61000-6-3
Radio interference suppression acc. to EN
55022, limit curve B
Noise immunity acc. to EN 61000-6-2
UL 508 / CSA 22.2
ATEX, CSA hazloc see page 8
Weight
1,2 kg
SITOP Puffermodul
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