All-rounderSL20.300
SL20.301

EMC andLow Volt.
DirectiveData sheet

UL60950 E137006
CUL/CSA-C22.2
No. 60950•••••

Input: 3 AC 400V / 3 AC 480V
Output: 24...28V / 480W (600W)
92% efficiency
Ideal for parallel operation
Simple fusing

CBscheme

IEC60950

Input
Input voltage

UL508 LISTED
IND. CONT. EQ.
18 WM, 60°C

OutputSL20.300: 3 AC 400 V, – 15 %, + 20 %SL20.301: 3 AC 480 V, – 15 %, + 20 %(SL20.100: AC 230 V, s. separate data sheet)
47-63 Hz, Suitable for IT power systems

Output voltage

Rated Tolerances• Continuousoperation• Short term (1 min)at 24 V/20 A

SL20.300: 340-479 V ACresp. 450-700 V DC
SL20.301: 408-576 V AC resp. 550-820 V DC
SL20.300: 300-550 V AC resp. 370-790 V DC
SL20.301: 360-620 V AC resp. 450-890 V DC

Ambient temperature
range TambInput current

3 x 1.5 A

Inrush current< 15 A at 440 V AC, < 17 A at 480 V AC

Inrush current limiting done with a fixed 47R resistor (not a thermistor)
which is bridged after the unit is running, so losses are minimised. Thatmeans no reset time even at a warm-start.
Fuse loading< 2 A2s

To be fused with a 3 x 10A, B-type 'circuit-breaker' switch based on theusual thermomagnetic overload sensing principle (used anyway to fuse
the input lines; unit has no internal fuses).
Harmonic current
emissions (PFC)acc. EN 61000-3-2

Transienthandling

Active transient filter incorporated, so transient resistance acc.to VDE 0160 / W2 (1300 V /1.3 ms), for all load conditions.

Hold up time> 11 ms
at 24 V/20 A, Vinnom

24...28 V DC, adjustable by (covered) front
panel potentiometer; preset: 24 V ±0.5%
Adjusting range guaranteed

Output noise suppression Radiated EMI values below EN50081-1, even
Silent Switcher ™
when using long, unscreened output cables.
Operation: 0°C...+70°C (>60°C: Derating)Storage: -25°C...+85°C

Rated continuous loading with convection cooling• Tamb=0°C - 60°C
• Tamb=0°C - 45°C

24 V / 20 A (480 W) resp. 28 V / 18 A (504 W)
24 V / 25 A (600 W) resp. 28 V / 22 A (616 W)
short-term also at 60 °C

Derating

typ. 12 W/K

Voltage regulation

better than 2% over allRipple< 20 mVPP (i.e. < 0.1 %) incl. spikes
20 MHz bandwidth, 50 !"measurement(at Tamb=+60°C...+70°C)

Over-voltage protection At 32 V ± 10%: switch to hiccup mode
Front panel indicators:• Green LED on, when Vout > UT, where UT is
ca. 2 V below Vout adjusted (24V...28V)• Red LED on, when 14 V < Vout< UT• Red LED flashes, when 0 V < Vout < 14 V

Parallel operation

Yes, up to ten SL20 units

To achieve current sharing the output V/I characteristic can be altered tobe 'softer' (25V at 0.4A, 24V at 20A). This is done by repositioning abridge connection (without opening the unit).
Reverse power immunity > 30 V

Efficiency, Reliability etc.*
Efficiency

typ. 92 %(24 V/20 A, Vinnom)

Lossestyp. 42 W(24 V/20 A, Vinnom)MTBF

310.000 h acc. to Siemensnorm SN 29500(24 V/20 A, Vinnom, Tamb = +40 °C)

Life cycle (electrolytics)

The unit exclusively uses longlife electrolytics,
specified for +105°C (cf. ’The SilverLine’, p.2).
High reliability, as• only four aluminium electrolytics and• no small aluminium electrolytics are used.

*For further information see data sheets „The SilverLine“, „SilverLine Family
Branches“ and mechanics data sheet

Order information
Order numberDescription

SL20.300
SL20.301
SLZ02

400 V input
480 V input
Screw mounting set, two needed per unit

sl20e300 / 031001

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Data sheet
Output V/I characteristic (typ.)Construction / Mechanics *32• WxHxD• Free space forventilation• Weight

220 mm x 124 mm x 102 mm (+ DIN rail)
above/below 70 mm recommended
left/right 25 mm recommended
1.8 kgDesign advantages:• All connection blocks are easy to reach as mounted at the front panel.
• PVC insulated cable can be used for all connections, as the connection
blocks are mounted in the cooler area on the underside of the unit.

Output voltage Vout [V]Housing dimensions and Weighttyp. 0.2 s

Rise timeca. 20-80 ms, depending on load

Duration of switch-on attempts at

16Vout < ca. 14V: Hiccup mode

28V / Parallel
28V / Single
24V / Parallel
24V / Single

80Start / Overload Behaviour
Startup delay2405101520253035

Output current Iout [A]Efficiency (typ., at Vout =24V)• Initial application
on mains• Subsequentattempts

ca. 1.4 s

Hiccup operation at

Vout < ca. 14 V

92

Duration between
switch-on attempts

ca. 4 s91

95

ca. 0.5 s

94Electronic current limiting, protects against overload and short circuit:• Vout < ca. 14 V: Periodical switch-on attempts (hiccup-mode).
• Vout > ca. 14 V: The output current is continuous.
The V/I characteristic of the supply is straight.
Advantages of the switch-on/overload behaviour:• Safer switch-on into highly non-linear loads with large
starting currents• Short-term overloads result in current limiting and not in
an immediate shut-down.
• Parallel operation of several units possible.
Proper switch-on performance is obtained.

Efficiency [%]939089340 V AC
400 V AC

8887

480 V AC8685
844812162025

Output current Iout [A]Hold-up time ((typ., at Vout =24V)
60
40% Load
60% Load
80% Load
100% Load
125% Load

Further Information

All data is valid for SL20.300.
For SL20.301 (with 480 V input) some values may differ.

40
Hold-up time [ms]For further information, especially about• EMC• Connections• Safety, Approvals• Mechanics und Mounting,see page 2 of the „The SilverLine“ data sheet.
For detailed dimensions
see SilverLine mechanics data sheet SL20200340360

380400420440460

480Input voltage VACin [V]Specifications valid for 3 x AC 400V input voltage, +25°C ambient temperature, and 5 min run-in time, unless otherwise stated. They are subject to change without prior notice.

Your partner in power supply:EuropeanPower Supply
Manufacturers
AssociationBayerns Best 50
Czech 100 Best
Europe’s 500

PULS GmbH
Arabellastraße 15D-81925 München
Tel.: +49 89 9278-0
Fax: +49 89 9278-199
www.puls-power.com

2/2

sl20e300 / 031001

Mechanics

Data sheet

SL20• Innovative DIN-Rail mount, unit
holds even at vibration or lateralpressure• Clearly arranged and user oriented• Large, robust screw terminals• Sealed metal housing• Fine ventilating grid

Input terminals
SL20.1xx

Front view SL20.300

Output terminals
SL20.115

Construction / Mechanics

ConnectionsHousing dimensions and Weight
220 mm x 124 mm x 102 mm (+ DIN rail)• WxHxD• Free space for above/below 70 mm recommended
left/right 25 mm recommended
ventilation
1.5 kg (SL20.100) / 1.8 kg (SL20.110, SL20.300)• Weight
2.5 kg (SL20.111, SL20.115)

Connections• Input/Output• Current handling
capacity• GridRobust metal housing withfine ventilat. grid ( 3,5 mm, IP20), to keep out small parts (e.g. screws)
Mounting

on DIN-Rail (TS35/7.5 or TS35/15, 1...1.5 mm thick)therefore• Simple snap-on system• Sits safely and firmly on the DIN-Rail• No tools required to remove
or backplane-mounted(two optional screw mounting sets SLZ01 required)sledrw20 / 040114

Screw terminals, connector size range:solid 0.5- 6 mm2 / flexible 0.5 - 4 mm2
30 A per output
Two connectors per output, 9 mm (SL20.115:6 mm) distance between adjacent connectors

Design advantages:• All connection blocks are easy to reach as mounted at the front panel.
Input/output strictly apart from each other, thus no mixing up• PVC insulated cable can be used for all connections, no thermal protection is needed

Order information
Order numberDescription

SL20.100 / .101
SL20.110 / .111
SL20.115
SL20.300 / .301
SLZ01

AC 230 V, no PFC / incl. PFC
Auto select, no PFC / incl. PFC
Auto select, remote switch-off
3 AC 400 V / 3 AC 480 V
Screw mounting set, two needed per unit

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Data sheet

Side view SL20

Bottom view
SL20

only SL20.110/.111

C

Input terminals
SL20.30x bottom view

SHP

Input terminals
SL20.1xx bottom view

Output terminals
SL20.115 bottom view

This ’mechanics data sheet’ exclusively deals with the mechanical properties of the product. For further information (especially concerning electrical properties), please refer to the generic data
sheet of the SL20 and to the basic data sheet „The SilverLine“ dealing with common features of all SilverLine units. This data sheet is subject to change without prior noticeYour partner in power supply:

EuropeanPower Supply
Manufacturers
AssociationBayerns Best 50
Czech 100 Best
EuropeÕs 500

PULS GmbH
Arabellastraße 15
D-81925 München
Tel.: +49 89 9278-0
Fax: +49 89 9278-199
www.puls-power.com

2/2

sledrw20 / 040114