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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)
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 (SITOP 20A (6EP1436-3BA00) or SITOP 40A (6EP1437-3BA00)) 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
Output variables
Output DC voltage U
: in buffer mode:
a
U
– 1 V
e
Output DC current I
:
a
0 - 40 A
Mains buffering :
with 40 A load current: 100 ms
with 20 A load current: 200 ms
The buffering time is longer for smaller load currents.
The maximum possible buffering time is 3 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
1, 2
Output voltage DC 24 V
SIEMENS AG ÖSTERREICH, 05.2001
Protection and monitoring
function
Static current limiting:
typ. 40 A
Signaling:
Green LED: Supply voltage >20.5 V
Ambient
Temperature
Storage and transport:
-25 to +85°C
Operation:
0 to +60°C
Humidity rating corresponds to climatic category
3K3 acc. to EN60721 Part 3, no condensation
Natural air cooling
Terminal range
Remarks
2
0.33 to 10mm
Screw-type terminals. Use a screw driver with a blade width of
AWG 22 to 8
5 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): SELV
Emitted interference acc. to EN50081-1
Radio interference suppression acc. to EN
55022, limit curve B
Noise immunity acc. to EN 50082-2, incl. Table
A4
UL 508 / CSA 22.2 in preparation
Weight
1,2 kg
SITOP Zusatzmodul Netzpufferung
English
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