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Warning / Danger of electric shock
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 upon proper transport, storage and installation. Before installation or
maintenance work is carried out, the main 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.
Important Note: Input 3 phase circuit breaker is required! (Refer to "Input Data")
Caution
The device may only be opened by qualified personnel. Electrostatically sensitive devices (ESD)
Description and construction
The SITOP 24V/20A power supplies are built-in units. The relevant local regulations must be observed during installation.
Primary switched-mode power supplies for connection to a 400 to 500 V, 50/60 Hz three-phase AC system (TN-, TT- or IT-system acc. to VDE 0100 T 300 /
IEC 364-3); output voltage +24 V DC, potential-free, short-circuit resistant and stable under no-load conditions.
Technical specifications
6EP1436-3BA01
Input data
Input rated voltage V
:
in rated
400 to 500 V 3 AC, 50/60 Hz
Voltage range:
360 to 550 V 3 AC
1)
Mains buffering time at 400 V
:
15 ms
Input rated current I
:
in rated
1,2-1,0 A
Inrush current is limited to (25 °C):
2
<18 A, <0.8 A
s
Required 3-ph. miniature circuit breaker
characteristic C:
6 to 16 A
Alternative:
circuit-breaker 3RV1021-1DA10, setting of the
thermal overcurrent trip: 3 A
Efficiency at full load (typical):
ca. 93%
Power input (active power):
520 W
Installation
Mounting on a DIN EN 50022-35x15/7.5 standard rail. To ensure adequate convection, the device must be installed vertically, with the input and the output
terminals at the bottom. Be sure to leave a minimum clearance of 50 mm above and below the device. The supply voltage (3-ph. AC 400-500 V) must be
connected in accordance with IEC 60364 and EN
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.
Parallel operation and response to short circuit
Selector switch
Function
A
For sharing the loads in parallel operation, the units can be switched from individual operation (OFF switch position) to parallel operation
(ON switch position). The ON switch position causes the output characteristic curve to slope.
B
In the OFF switch position (constant-current mode) the unit supplies a constant current of approx. 1.15 x rated current in the event of
overload/short-circuit. In the ON position (shutdown mode) the unit is shut down if overloading occurs for longer than approx. 100 ms.
The unit can be reset by OFF mains supply for at least 5 s.
Connections and terminal assignment
Terminals
Function
L1, L2, L3
Input voltage 400 to 500 V 3 AC
PE
Protective earth conductor
+, –
Output voltage 24 V DC
1)
The optional 6EP1961-3BA00 module is available for longer mains buffering times of up to 3 s, while the optional 6EP1961-3BA10 module can be used for
signaling and for switching ON/OFF remotely
SIEMENS AG ÖSTERREICH, 06.2007
Output data
Output rated voltage V
:
out rated
24 V DC ±1% (as delivered)
Setting range: 24 to 28,8 V, adjustable by
potentiometer on front of device (see page 2 for
position)
Derating at U
>24 V:
a
4% [I
]/ V [V
]
out
out
(max. 480 W)
Ripple content of output voltage:
<100 mV
ripple
pp
<200 mV
spikes
pp
Output rated current I
:
out rated
20 A
Two power supplies of identical design may be
connected in parallel in order to improve the
performance. Output characteristics can be selected
with switch A (see page 2 for position).
Environmental conditions
Temperature:
Storage/transport: -25 to +85 °C [-13 to +185°F]
Operating:
-10 to +60 °C [+14 to +140°F]
Humidity:
according to EN 60721 class 3K3; no condensation
Natural convection should be allowed to form
Weight
1.2 kg [2.65 lb.]
50178.
It is important to provide the protective device referred to above (miniature circuit-breaker or circuit-
(see page 2 for position)
Terminal range
2
0.2 to 4 mm
, AWG 24 to 10
2
0.2 to 4 mm
, AWG 24 to 10
.
4/8
Protection and monitoring functions
Current limitation (threshold value):
1.05 to 1.2 x I
out rated
Current limitation dynamic:
30 A for 5 s/min
Response to short circuit (output):
Constant current or shut down can be selected with
switch B (see page 2 for position)
1)
Signaling/Signals
:
Output voltage > ~20.5V
Green LED:
Yellow LED:
Overload; output voltage < 20.5V
("constant current" mode only)
Red LED:
Latching shutdown ("shutdown" mode
only) or remote OFF by means of the
optional 6EP1961-3BA10 module
Standards and approbations
Degree of protection IP20 to IEC 529
Protection class 1
Safety to EN 60950: SELV
Safe electrical isolation met in accordance with
EN 60950 and EN 50178;
Transformer corresponds EN 61558-2-17
Emission: EN 61000-6-3;
RI suppression to EN 55022, limit curve B
Noise immunity to EN 61000-6-2,
EN 61000-4-2/-3/-4/-5/-6/-11
CE marking acc. to 98/336 EEC and 73/23 EEC
UL/cUL pending
Remarks
Screw-type terminals. Use a
screwdriver with a blade width of
4 mm. Recommended tightening
torque 1.2 Nm.
English
SITOP modular 24V/20A
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