sitop

When the cables get too thick –SITOP modular 48 V/20 A

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For applications with 48 Volt power supply, SITOP modular 48 V/20 A is the bestchoice. Instead of the usual 24 Volt, higher-rating DC loads are supplied withtwofold voltage. This means, significantly lower cable cross-sections are required,and nevertheless the safety extra low voltage limit is not exceeded. Just like thewell-proven basic units from the 24 Volt series, also the 48 Volt switched-modepower supply offers a whole raft of extensive functions for the widest range ofrequirements. And the plug-in signalling module increases the flexibility evenmore – with an optimum price/performance ratio. SITOP – a step ahead.

Your advantages at a glance• Modular design, comprising a basic

unit and signaling module• Compact design with a small

footprint• High efficiency and therefore low

power loss in the electrical cabinet• No additional mounting width

needed• Metal enclosure and mounting rail

for rugged industrial use• Wide range input 3-ph. 320 to 550

V AC (without changeover) forworldwide use

• Characteristic which can bechanged-over for even currentdistribution when operated inparallel

• Selectable short-circuit behavior:Constant current or fault memorywhen an overload occurs

• Power Boost with up to 300% ratedcurrent (60 A), e.g. to trip a circuit-breaker on the secondary side

• Triple LED display to reliablyindicate the operating state

• Selectable output voltage 42 to 56 Vto compensate voltage drops alonglong cables

• Supplementary signalling modulewith floating signalling contacts for“DC voltage OK” and “Operatingreadiness OK” as well as signalinput for remote ON/OFF circuit ofthe power supply

w w w. a - s t e p - a h e a d . d e

MODULAR 48 V

Siemens AGAutomation and DrivesSystems EngineeringPostfach 23 55, D-90713 Fürth

Order No. E80001-A1560-P310-X-7600Dispo 0630521C7775 MK.SE.ST.SITP.52.3.03 SB 11023.0Printed in Germany

Technical Data

Basic unit 48 V/20 A Signalling module

Input data Product/Function descriptionInput voltage 3-phase AC voltage The operating state of the power supply can be– Nominal value Ve nominal 3-ph. 400 to 500 V AC wide-range input evaluated using floating signalling contacts and,– Range 3-ph. 320 to 550 V AC furthermore, the power supply can be remotely

powered-up and powered-down. This means thatPower failure buffering > 6 ms (at 400 V) the power supply can be optimally integrated inLine supply frequency the automation and monitoring system.– Nominal value 50/60 Hz This allows potential damage to be avoided.– Range 47 to 63 HzInput current Floating signal contacts:– Nominal value 2.2 A (at 400 V) • “DC voltage OK” message– Inrush current limiting (+ 25° C) < 70 A • “Operating readiness OK” message– I2t < 2.8 A2s • Remote ON/OFF circuit of the basic unit– Required fusing in the line feeder cable 3-phase coupled circuit-breaker, 10 to 16 A Char. C or motor Contact load capability, 240 V AC/6 A protection circuit-breaker 3RV1021-1DA10, 3 A settingOutput dataOutput voltage Regulated, floating DC voltage– Nominal value Va nominal 48 V DC– Range 42 to 56 V DC– Overall tolerance +/–3%– Residual ripple (clock cycle frequency, approx. 50 kHz) < 100 mVpp– Switching spikes (20 MHz bandwidth) < 200 mVpp

Output current– Nominal value Ia nominal 20 A– Range up to +60 °C 0 to 20 A– Dynamic V/I for – ramp-up and short circuit approx. 23 A – short circuit in operation typ. 60 A for 25 msOperating display Green LED for “48 V OK”, yellow LED for “Overload”,

red LED for “Fault memory trip”Efficiency at Va nominal, Ia nominal approx. 90%Can be connected in parallel Yes, 2 units (characteristic can be changed-over)to increase the powerElectronic short-circuit protection Yes, constant current or fault memory trip can be selected

Electromagnetic compatibility EMC– Noise emission EN 50081-1, EN 55022 Class B EN 50081-1, EN 55022 Class B– Line supply harmonic limiting EN 61000-3-2 Not applicable– Noise immunity EN 61000-6-2, EN 61000-4-2, -3, -4, -5, -6, -11 EN 61000-6-2, EN 61000-4-2, -3, -4, -5, -6, -11

SafetyProtective class Class I Class IPotential separation, primary/secondary Yes, SELV output voltage acc. to EN 60950 and EN 50178 Yes, SELV output voltage acc. to EN 60950 and EN 50178Degree of protection (EN 60529) IP 20 IP 20German Inspectorate prototype test Yes YesCE Mark Yes YesUL/cUL (CSA) certification Yes, UL/cUL-listed (UL508, CSA 22.2), File E 197259 Yes, UL/cUL-listed (UL508, CSA 22.2), File E 197259

General dataAmbient temperature range 0 to +60 °C with natural convection 0 to +60 °C with natural convectionTransport and storage temperature range –25 to +85 °C –25 to +85 °CConnections Screw terminals for 0.14 to 2.5 mm2 solid/finely stranded– Line supply input L1, L2, L3, PE Each one screw terminal for 0.2 to 4 mm2 solid/finely

stranded– Output + 2 screw terminals for 0.5 to 10 mm2

– Output – 2 screw terminals for 0.5 to 10 mm2

Mounting Can be snapped onto standard mounting rails Can be directly snapped onto and screwed to the sideDIN EN 50022-35 x 15/7.5 of the basic unit, contacts are automatically established

Dimensions(width x height x depth) in mm 240 x 125 x 125 26 x 125 x 116Weight approx. 3.2 kg approx. 0.15 kg

Order No. 6EP1457- 3BA00 6EP1961- 3BA10

www.siemens.com/sitop