SIEMENS AG ÖSTERREICH
4/8
SITOP Power 20
English
!
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.
Potentiometer R230 is only allowed to be actuated using an insulated screwdriver to DIN 7437, because accidental contact
may be made with parts inside the equipment carrying dangerous electrical voltage.
CAUTION
The device may only be opened by qualified personnel.
Electrostatically sensitive devices (ESD)
Description and construction
The SITOP 24 V / 20 A power supply is a built-in unit. The relevant DIN/VDE regulations or equivalent local regulations must be observed
during installation.
For connection to 2 phases of a 3-phase or 2-phase AC system (TN-, TT- or IT-system, symmetrical or unsymmetrical/VDE100 Teil 300 /
IEC 364-3)with rated voltages of 500V to 600V,50/60Hz..
Output v24 V DC, potential-free, short-circuit resistant and stable under no-load conditions.
Technical specifications
Input data
2-ph. AC input voltage :
500V to 600V 50/60 Hz
Voltage tolerance
L1-L2: 420V... 682 V
L1-PE: 0V ... 682 V
L2-PE: 0V ... 682 V
Overvoltage proof:
according to EN61000-4-1 A.2
Efficiency at full load (typical):
89%
Limitation of inrush current (25 °C):
standard
<25A, <1A
2
s
2-ph. miniature circuit breaker,
characteristic C:4... 10 A
Alternative: motor circuit-breaker
Siemens:3VU1300-0MJ00 or 3RV1021-1DA10,
Setting of the thermal overcurrent trip:
3 A
Input current at 420 V and output 480W:
1.82 A
rms
Power input (active power) at output 480W:
540 W
Output data
DC output voltage:
As delivered : 24 V
±
2%
Setting range adjustable with screwdriver at
potentiometer R230 (on underside of device, see
page 2 for item No.) from 22.8 to 28,8 V
Ripple content of output voltage:
<150 mV
ss
ripple
<240 mV
ss
spikes
DC output current:
0A-20 A
Two devices of identical design may be connected
in parallel in order to improve the performance.
(see notes in Catalog KT10).
Environmental conditions
Temperature
Storage and transport: -25°C to +85 °C
Operating: 0°C to +60 °C
Operation in parallel mode or with higher output
voltage: 0°C to +50 °C
Humidity:
according to EN 60721 class 3K3
No condensation
Natural air cooling
mechan. stability:
according EN60721-3-3 class 3M3
Protection and monitoring
functions
Signaling:
green LED: Output voltage typ. > 20V
Steady-state current limitation: Typ. 1.05 - 1.3 x I
rated
Response to short-circuit (output):
Automatic restart
Mains buffering time at 420 / 600 V:
6 / 30 msec
Standards and specifications
Degree of protection IP20 to IEC 529
Protection class 1 to IEC 536
Safety to VDE 0160 and VDE 0805 (EN60950):
SELV
Emission: EN 50081-1, RI suppression to EN55022,
limit curve A
Noise immunity to EN 50082-2 incl. Table A4
Limitation of input circuit harmonics harmonics
according to EN61000-3-2
(Limits values for 3 phase systems.)
UL508/CSA 22.2 FILE E143289
Weights
3,3 kg
Installation
Mounting on a DIN EN 50022-35x15/7.5 standard rail. To ensure adequate cooling, the device must be installed vertically so that the input
terminals are at the top and the output terminals at the bottom. Be sure to leave a minimum clearance of 50 mm above and below and
40mm to the left of the device.
The supply voltage (2-ph. AC 500V to 600V) must be connected in accordance with VDE 0100 and VDE 0160. It is important to provide the
protective device referred to above (circuit-breaker or motor circuit-breaker) and the disconnecting device for isolating the power supply. A
current-operated earth-leakage circuit-breaker must not be the sole device used where protection against indirect contact is required. The
same applies for the entire system protected by a current-operated earth-leakage circuit-breaker.
Connections and terminal assignment
Terminals
Function
Terminal range
Remarks
L1, L2
Input voltage 2-ph. AC500 to 600 V
0.14 to 2.5mm
2
Screw-type terminals. Use a screwdriver with a blade width of
PE
Protective earth conductor
(AWG 22..12)
3.5 mm. Recommended tightening torque 0.5-0.7 Nm
L+, M
Output voltage DC 24 V
0.33 to 10 mm
2
(AWG 22...8)
Screw-type terminals. Use a screw driver with a blade width of
5 mm. Recommended tightening torque 1.2 Nm.
The German text applies in cases of doubt
