All-rounder withsafety

CBscheme

SL20.310

IEC60950

Data sheet

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

Input: 3 AC 400-500V
Output: 24-28V / 490W
Power boost up to 600W
Separate primary fuse not necessary
Switchable operating mode(single/parallel)• Switchable overload behaviour
options (Fuse Mode)

UL60950 E137006
CUL/CSA-C22.2
No 60950

Type approvalacc. to:• IEC / EN60950• EN50178
Overvolt. cat. III• EN60204

EMC andLow Volt.
Directive

Short description

OutputThis compact power supply unit is characterised by the variety of possibilities of application and low system costs. The fact that the externalfuses are no longer necessary is an advantage as it saves cost andspace. The switchable Fuse Mode and the extremely comprehensive
approvals package including EN60204 make the SL20.310 the unit ofchoice.

Output voltage

At a competitive price, it also offers 25A power boost, output noise
suppression, optional Single Mode or Parallel Mode, small dimensions, more than 500,000h MTBF as well as easy installation. The unit
can be connected to European and American power supply networkswithout switching.

Ambient temperature
range Tamb

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

Derating

12W/K

Input
Nominal Input voltage

3 AC 400-500V, ±15%47-63Hz, suitable for IT power systems

Rated tolerances• Continuous operat. AC 340...576V resp. DC 450...820V• Please ask for 'application notes' at operation with DC input voltage.
Input current

3 x 1.5A

Inrush current<2.5A eff. resp. <7Apk

Unit is internally fused (fuse not accessible). For external fusing of unitand for input line protection, use circuit breaker with B-characteristic
10A or slower action, or alternatively T10A HBC fuse.
2-phase operation: Operation is possible even if one phase fails. Withhigh ambient temperature or high load, Pout is adjusted downwards.
The red LED is on. Also see Overload Behaviour (overleaf).

DC 24-28V adjustable by (covered) front
panel potentiometer, preset: 24.5V ±0.5%
Adjusting range guaranteed

Output noise suppression Radiated EMI values below EN50081-1, even
Silent Switcher ™
when using long, unscreened output cables.

(@ Tamb = +60°C...+70°C)

Rated continuous loading with convection cooling• Tamb=0°C - 60°C
24.5V/20A (490W) resp. 28V/18A (504W)• Tamb=0°C - 45°C
24.5V/25A (612W) resp. 28V/22A (616W)
short-term (<1 min.) also at 60°C admissible
Output is protected against short-circuit, open circuit and overload.
Voltage regulation<2% static, jumper in ’Single Mode’ position

Ripple/Noise<30mVPP (< 0.1%) incl. spikes(20MHz bandw., 50 !"measurement)

Overvolt. protection

At 33V ±10%: switch to hiccup mode

Power back immunitymax. 35VParallel operation

Yes, up to ten SL20

To achieve current sharing:• Plug jumper into pos. 'Output parallel use'. This alters the output V/Icharacteristic to be 'softer' (25V at 2A, 24V at 20A). The output voltage
can still be adjusted.
• Missing jumper = 'Single Use', i.e. 'hard' characteristic

Transient handling

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

Front panel indicator:• Green LED on, when Vout = set output voltage• Red LED on, when Vout < set output voltage(with overload and overtemp. as well as overload with 2-phase op.)
• Red LED flashes after switch-off in the Fuse Mode

Hold-up time

>11ms
at 24.5V/20A, Vin: AC 400V

Construction / Mechanics*

EN 61000-3-2 (harmonic current emissions [PFC]) is fulfilled

Housing dimensions and Weight:• WxHxD
150mm x 124mm x 121mm (+ DIN Rail)• Weight
1.8kg• Recomm. free space for conv. cool.: above/below 70mm, left/right 25mm
• 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

sl20e310 / 030709

Order numberDescription

SL20.310
SLZ01(Screw mounting set, two needed per unit)
1/2

Data sheet
Efficiency, Reliability etc.*

Output characteristic (typ.)(24.5V/20A, Vinrated)

30

Lossestyp. 42W(24.5V/20A, Vinrated)

25

MTBF

504.000h acc. to Siemensnorm SN 29500(24.5V/20A, AC 400V, 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 4 aluminum electrolytics and• no small aluminum electrolytics are used.

Output voltage Vout [V]typ. 92%

Efficiency

24.5V / Single
24.5V / Parallel
28V / Single
28V / Parallel

151050Start Behaviour
Start-up delay
Rise time2005101520
Output current Iout [A]2530

diag. 1

typ. 0.45s
appr. 5-20ms, depending on load
Efficiency (typ., @ Vout =24V)

Overload Behaviourb) Fuse Mode (Switch-off after typ. 4s):
• Jumper is in the 'OVL fuse mode' position.
• When overload, short-circuit or overload with 2-phase operation occurs orin case of overtemperature for more than typ. 4s, the unit switches off theoutput (residual volt. <3V without load, average short circuit current<0.1A)• Definition of overload or short-circuit: The set output voltage in each case
can no longer be maintained.
• The capacity to deliver current (PULS Overload Design) (see diag. 1)
remains unchanged during the typ. 4s delay time.
• Red LED flashes at switch-off.
Feature: With some applications, the Fuse Mode can replace the usual fusing
on the secondary side. The Fuse Mode has closer tolerances than thermal
trips. The release delay time of typ. 4s ensures that motors can be reliably
operated.
Re-start:• by pushing the reset button on the unit’s bottom panel.
• by disconnection from mains and re-start of the unit after >1 min.

92%
Efficiency [%]a) Continuous Mode (continuous current):• Jumper is in the 'OVL cont. mode' position.
• When overload or short-circuit occurs, the unit continuously supplies current (see. diag. 1), no Hiccup.
Advantage: The unit starts reliably even with heavy, non-linear loads (high capacities, DC-DC converters, motors). The high short-circuit current triggers
downstream fuses, and allows for selective configuration of electrical installations.

93%

91%
90%

3 x AC 400V
3 x AC 340V
3 x AC 480V

89%
88%
87%

3-phase86%
48121620
Output current Iout [A]Hold-up time (min., @ Vout =24.5V)
60
50
4040% load
60% load
80% load
100% load
125% load3020
103-phase
0340 360 380 400 420 440 460 480 500
Input voltage VACin [V]Overtemperature Protection
Continuous Mode

Output voltage is adjusted downwards as long as
overtemperature prevails

Fuse Mode

Unit remains switched off after overheating until restart (after cooling); (also see ’Re-start’ above).

24diag. 2

Hold-up time [ms]Two different operating mode options, switchable by plugging the frontpanel OVL-jumper. If the jumper is missing, the unit is in the Fuse Mode.
The unit is delivered preset in Continuous Mode.

94%

diag. 3For further information, especially about, EMC,Connections, Safety, Approvals, Mechanics und Mounting,see page 2 of the „The SilverLine“ data sheet.

Unless otherwise stated, specifications are valid for AC 230V input voltage, +25°C ambient temperature, and 5 min. run-in time. 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 15
D-81925 MünchenTel.: +49 89 9278-0
Fax: +49 89 9278-199
www.puls-power.com

2/2

sl20e310 / 030709

Mechanics

Data sheet

SL20.310• Innovative DIN-Rail mount, unit
holds even at vibration orlateral pressure• Clearly arranged and user oriented• Large, robust screw terminals• Sealed metal housing• Fine ventilating grid

Front view
SL20.310

150

Construction / Mechanics

Connections

Housing dimensions and Weight• WxHxD
150 mm x 124 mm x 121 mm(+ DIN rail)
above/below 70 mm recommended• Free space forleft/right 25 mm recommended
convection cooling
1.8 kg• Weight

Connections• Input/Output• Current handling
capacity• GridRobust metal housing withfine ventilat. grid ( 3,5 mm, IP20), to keep out small parts (e.g. screws)
Montingon 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 SLZ01required)sledrw20_3 / 040114

Screw terminals, connector size range:solid 0.5- 6 mm2 / flexible 0.5 - 4 mm2
30 A per output
Two connectors per output,
Primary side: 9,52 mm between adjacentconnectors
Secondary side: 6,35 mm between adjacentconnectors

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 number

Description

SL20.310
SLZ01

Screw mounting set, two needed per unit
1/2

Data sheet
Bottom view
SL20.310

Side view
SL20.310

This ’mechanics data sheet’ exclusively deals with the mechanical properties of the product. For further information (especially concerning electrical properties), please refer to the genericdata sheet of the SL20.310 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 15D-81925 München
Tel.: +49 89 9278-0
Fax: +49 89 9278-199
www.puls-power.com

2/2

sledrw20_3 / 040114