All-rounderSL20.303
Data sheet

EMC andLow Volt.
Directive•••••

Input: 3 AC 400V
Output: 48...56V / 480W (600W)
92% efficiency
Ideal for parallel operation
Simple fusing

IEC60950

Output3 AC 400 V, – 15 %, + 20 %47-63 Hz, suitable for IT power systems

Rated tolerances
340-479 V AC• Continuousoperation• Short-term (1 min) 300-550 V ACat 48 V/10 A

or 450-700 V DC
or 370-790 V DC

Input current

3 x 1.5 A

Inrush current< 15 A at 440 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. to 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 48 V/10 A, 400 V AC

Efficiency, Reliability etc.*
Efficiency

typ. 92 %(48 V/10 A, 400 V AC)

Lossestyp. 42 W(48 V/10 A, 400 V AC)

MTBF

310.000 h acc. to Siemensnorm SN 29500(48 V/10 A, 400 V AC, Tamb = +40 °C)

Life cycle (electrolytics) The unit exclusively uses longlife electrolytics,specified for +105°C (cf. ’The SilverLine’, p.2).
High reliability and lifetime, as• only four aluminum electrolytics and• no small aluminum electrolytics are used.
*UL508 LISTED
IND. CONT. EQ.
18 WM, 60°C

CBscheme

Input
Input voltage

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

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

Output voltage

48...56 V DC, adjustable by (covered) front
panel potentiometer, preset: 48.1V ±0.5%
Adjusting range guaranteed

Output noise
suppression

Radiated EMI values below EN50081-1, evenwhen using long, unscreened output cables.

Ambient temperature
range Tamb

Operation: 0°C...+70°C (>60°C: Derating)Storage: -25°C...+85°C

Rated continuous loading with convection cooling• Tamb=0°C - 60°C
48 V / 10 A (480 W) resp. 56 V / 9 A (504 W)• Tamb=0°C - 45°C
48 V / 12.5 A (600 W) resp. 56 V / 11 A (616 W)
short-term (< 1 min.) also at 60°C permissible
Derating

typ. 12 W/K(at Tamb=+60°C...+70°C)

Voltage regulation

better than 2 % over allRipple< 50 mVPP (i.e. < 0.1 %) incl. spikes
20 MHz bandwidth, 50 !"measurement

Over-voltage protect.

At 61V ± 7%: switch to hiccup modeFront panel indicators:• Green LED on, when Vout > UT, where UT isappr. 4 V below Vout adjusted (48 V...56 V).
• Red LED on, when appr. 28 V < Vout < UT.
• Red LED flashes, when 0 V < Vout < appr. 28 V.
Parallel operation

Yes, up to ten SL20 units

To achieve current sharing the output V/I characteristic can be altered tobe 'softer' (48.8 V at 0.1 A, 48 V at 10 A). This is done by repositioning abridge connection (without opening the unit).
Power Back Immunity< 63 VConstruction / Mechanics*
Housing dimensions and Weight
220 mm x 124 mm x 102 mm (+ DIN rail)• WxHxD
above/below 70 mm recommended• Free space forright/left 25 mm recommended
ventilation
1.8 kg• Weight
Design 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.

Order information
Order number

Description

SL20.303
SLZ02

Screw mounting set, two needed per unit

sl20e303 / 030924

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Data sheet
Output V/I characteristic (typ.)Start / Overload Behaviour
Rise time

appr. 20-80 ms, depending on load

Duration of switch-on attempts at
appr. 1.4 s• Initial applicationon mains• Subsequent
appr. 0.5 s
attempts
Hiccup operation at

Vout < appr. 28 V

Duration between
switch-on attempts

appr. 4 s

Electronic current limiting, protects against overload and short circuit:• Vout < appr. 28 V: Periodical switch-on attempts (hiccup mode).
• Vout > appr. 28 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.

Further information

64
56
Output voltage Vout [Vtyp. 0.2 s

4032
Vout < ca. 28V: Hiccup mode

2456V / Parallel
56V / Single
48V / Parallel
48V / Single

160024681012141618

Output current Iout [A]Efficiency (typ., at Vout =48V)
95
94939291

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 SL2048

8Efficiency [%]Startup delay

90
8988
340 V AC
400 V AC480 V AC

87
8685
84
24681012

Output current Iout [A]Hold-up time (min., at Vout =48V)
60
40% Load
60% Load
80% Load
100% Load
125% Load

Hold-up time [ms]50403020100340360380400420

440460480

Input 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

sl20e303 / 030924

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

Connections

Housing 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 mm230 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 VScrew 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 BestEuropeÕs 500

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

2/2

sledrw20 / 040114