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Siemens · 10/2015
Transformers, Power Supply Units and Socket Outlets
4AC2 power supply units
■
Overview
The electronic power supply unit provides a 24 V DC supply to
systems with an operational voltage of 85 to 265 V AC or
85 to 300 V DC. The device operates in the lower class for
minimum power supply with a safety extra-low voltage (SELV).
The electronic power supply unit is suitable for supplying the
5TT71 GSM alarm modules within a supply voltage range of
150 to 230 V AC.
■
Technical specifications
4AC2402
Standards EN 60068-2, EN 61558-1, EN 61000-4
Approvals --
Rated operational power P
s
W8.4
Rated operational voltage U
e
V AC 85 ... 265
V DC 85 ... 300
Permissible operational voltage
For the 5TT71 GSM alarm modules V AC/DC 150 ... 265
Primary operating range At 50/60 Hz × U
e
--
Rated frequency Hz 50/60
Operating frequency range Hz --
Rated secondary voltage U
sec
V DC 24 ± 5 %
Rated secondary current I
sec
A DC 0.35
Current limitation Electronic overload protection
Residual ripple mV < 100
Rated power dissipation P
v
In no-load operation W --
At rated load W --
Hum-free Core molded --
Safe separation Creepage distances and
clearances
mm > 5.5
Insulation class --
Test voltage
Primary against secondary winding 50 Hz, 1 min kV --
Insulation resistance kV 4
Rated impulse withstand voltage/
degree of pollution Acc. to IEC 60664-1 6 kV/2
Static discharge Acc. to IEC/EN 61000-4-2 kV 8
RF irradiation Acc. to IEC/EN 61000-4-3 V/m 10
Transient overvoltage (burst) Acc. to IEC/EN 61000-4-4 kV 4
Transient overvoltage (surge) Acc. to IEC/EN 61000-4-5
• Supply lines A1, A2 kV 1
• A1/A2 and ground kV 2
RF, conducted disturbance Acc. to IEC/EN 61000-4-6 V 10
Interference suppression to
lower limit class Acc. to EN 61000-6-3 Complied with
Terminals
• Screw (slotted-head) M2.5
• ±screw (Pozidriv) --
Conductor cross-sections
• Rigid mm
2
0.5 ... 2.5
• Flexible, with end sleeve, min. mm
2
0.5 ... 1.5
Permissible ambient temperature °C -20 ... +60
Permissible humidity %
Resistance to climate Acc. to IEC/EN 60068-1 20/045/04
Resistance to vibrations
Frequency 10 ... 55 Hz
Acc. to IEC/EN 60068-2-6 mm 0.35 amplitude
Degree of protection Acc. to EN 60529 IP20, with connected conductors
Safety class Acc. to EN 61140 II
LV10-1_THB_09_EN.book Seite 7 Freitag, 24. Juli 2015 1:35 13
© Siemens AG 2015