STEP-PS/1AC/24DC/3.8/C2LPS
Primary-switched power supply for building
automation
INTERFACE
Data sheet
103986_de_00
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Description
© PHOENIX CONTACT - 07/2009
Features
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Easy assembly on the DIN rail or panel
Maximum energy efficiency thanks to low idling losses
Quick startup with LED function monitoring
High operating safety due to long mains buffering under
full load and high MTBF (> 500,000 h)
Can be used worldwide in all industrial sectors due to a
wide-range input and an international approval package
Wide temperature range of -25°C to +70°C
Limited output power < 100 W in accordance with UL
1310 for NEC Class 2 applications
STEP POWER power supply units – for building
automation, for NEC Class 2 applications
The new STEP POWER generation of compact power supply
units is particularly suitable for installation distributors and flat
control panels thanks to its design. The power supply units
are available with 24 V DC output voltage in four performance
classes and widths, and with the special voltages 5, 12, 15
and 48 V DC. The high degree of efficiency and the low
stand-by losses help in attaining high power efficiency.
DANGER OF EXPLOSION!
Only remove equipment when it is disconnected and not in the potentially explosive area.
DANGER
The device contains dangerous live elements and high levels of stored energy.
Never carry out work when the power is turned on.
Make sure you always use the latest documentation.
It can be downloaded at
www.phoenixcontact.net/download
STEP-PS/1AC/24DC/3.8/C2LPS
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Table of contents
Description ..................................................................................................................................
1
Features.....................................................................................................................................................................1
Table of contents.........................................................................................................................
2
Ordering data ..............................................................................................................................
3
Technical data.............................................................................................................................
3
Structure......................................................................................................................................
6
Block diagram .............................................................................................................................
7
Safety notes ................................................................................................................................
7
Installation ...................................................................................................................................
8
Installation position......................................................................................................................
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Assembly ...................................................................................................................................................................9
Removing...................................................................................................................................................................9
10 Mounting on DIN rails ..................................................................................................................
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11 Connection to various systems....................................................................................................
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12 Input ..........................................................................................................................................
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Protection of the primary side...................................................................................................................................10
Recommended backup fuse for mains protection ....................................................................................................10
13 Output .......................................................................................................................................
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Protection of the secondary side ..............................................................................................................................10
14 Signaling ...................................................................................................................................
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15 Function ....................................................................................................................................
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Output characteristic curve ......................................................................................................................................11
Thermal behavior .....................................................................................................................................................11
103986_de_00
PHOENIX CONTACT
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STEP-PS/1AC/24DC/3.8/C2LPS
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Ordering data
Type
STEP-PS/1AC/24DC/3.8/C2LPS
Description
DIN rail power supply unit 24 V DC/3.8 A, primary switched-mode, 1-
phase, for NEC Class 2 applications
Order No.
2868677
Pcs. / Pkt.
1
4
Technical data
Input data
Input nominal voltage range
AC input voltage range
DC input voltage range
AC frequency range
DC frequency range
Current consumption
Inrush current limitation
I t
Power failure bypass
Typical response time
Protective circuitry
Input fuse, integrated
Recommended backup fuse for mains protection
2
100 V AC ... 240 V AC
85 V AC ... 264 V AC
95 V DC ... 250 V DC
45 Hz ... 65 Hz
0 Hz
Approx. 1.3 A (120 V AC)
Approx. 0.8 A (230 V AC)
< 15 A (typical)
< 1 A
2
s
> 25 ms (120 V AC)
> 120 ms (230 V AC)
< 0.5 s
Transient surge protection Varistor
4 A (slow-blow, internal)
6 A (characteristic B)
10 A (characteristic B)
16 A (characteristic B)
Output data
Nominal output voltage
Setting range of the output voltage
Output current
Derating
Control deviation
24 V DC ±1%
22.5 V DC ... 25 V DC (> 24 V constant capacity)
3.8 A (-25°C ... 70°C)
6.5 A (maximum output current)
Above +55°C: 2.5% per Kelvin
< 1 % (change in load, static 10% ... 90%)
< 2 % (change in load, dynamic 10% ... 90%)
< 0.1 % (change in input voltage ±10%)
11.8 W
0.7 W
> 88 % (for 230 V AC and nominal values)
< 0.5 s (U
OUT
(10% ... 90%))
< 25 mV
PP
(with nominal values)
< 25 mV
PP
(with nominal values)
Yes, for redundancy and increased capacity
No
Yes, limited to approx. 35 V DC
Max. 35 V DC
Power loss nominal load max.
Maximum power dissipation idling
Efficiency
Ascent time
Residual ripple
Peak switching voltages
Connection in parallel
Connection in series
Surge protection against internal surge voltages
Resistance to reverse feed
LED status indicator
Status display
"DC OK" LED green / U
OUT
> 21.5 V: LED lights up
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STEP-PS/1AC/24DC/3.8/C2LPS
General data
Insulation voltage input/output
Degree of protection
Class of protection
MTBF
Dimensions W / H / D (state of delivery)
Weight
4 kV AC (type test)
2 kV AC (routine test)
IP20
II
> 500 000 h in acc. with IEC 61709 (SN 29500)
90 mm / 90 mm / 61 mm
0.4 kg
Ambient conditions
Ambient temperature (operation)
Ambient temperature (storage/transport)
Max. permissible relative humidity (operation)
Vibration (operation)
Shock
Pollution degree in acc. with EN 50178
Climatic class
-25 °C ... 70 °C (> 55° C derating)
-40 °C ... 85 °C
95 % (at 25 °C, no condensation)
< 15 Hz, amplitude ±2.5 mm in acc. with IEC 60068-2-6
15 Hz ... 150 Hz, 2.3g, 90 min.
30g in all directions in acc. with IEC 60068-2-27
2
3K3 (in acc. with EN 60721)
Standards
Electrical Equipment for Machinery
Safety transformers for power supply units
Electrical safety (of information technology equipment)
Electronic equipment for use in electrical power installations
SELV
Safe isolation
Protection against electric shock
Protection against electric shock, basic requirements for safe isolation in
electrical equipment
Limitation of mains harmonic currents
Certificate
EN 60204
IEC 61558-2-17
IEC 60950/VDE 0805 (SELV)
EN 50178/VDE 0160 (PELV)
IEC 60950 (SELV) and EN 60204 (PELV)
DIN VDE 0100-410
DIN VDE 0106-1010
DIN 57100-410
DIN VDE 0106-101
EN 61000-3-2
CB Scheme
Approvals
UL approvals
UL/C-UL listed UL 508
UL/C-UL Recognized UL 60950
NEC Class 2 as per UL 1310
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STEP-PS/1AC/24DC/3.8/C2LPS
Conformance with EMC guideline 2004/108/EC and for low-voltage guideline 2006/95/EC
Noise immunity according to EN 61000-6-2
Electrostatic discharge
EN 61000-4-2
Housing
Contact discharge
Discharge in air
Comments
Electromagnetic HF field
EN 61000-4-3
Housing
Frequency range
Field intensity
Comments
Fast transients (burst)
EN 61000-4-4
Input
Output
Comments
Surge current loads (surge)
EN 61000-4-5
Input
Output
Comments
Conducted interference
EN 61000-4-6
Input/output
Frequency range
Voltage
Comments
Voltage dips
EN 61000-4-11
Input
Comments
(mains buffering > 20 ms)
Criterion A
Level 3 - asymmetrical
10 kHz ... 80 MHz
10 V
Criterion A
4 kV (asymmetrical: Conductor to ground)
2 kV (symmetrical: Conductor to conductor)
2 kV (level 3 - asymmetrical: conductor to ground)
1 kV (Level 3 - symmetrical: Conductor to conductor)
Criterion B
4 kV (level 4 - asymmetrical)
2 kV (Level 3 - asymmetrical)
Criterion B
Level 4
80 MHz ... 3000 MHz
10 V/m
Criterion A
Level 3
± 6 kV (Contact discharge)
± 8 kV (Air discharge)
Criterion B
Emitted interference in acc. with EN 61000-6-3
Radio interference voltage in acc. with EN 55011
Emitted radio interference in acc. with EN 55011
EN 55011 (EN 55022) class B used in industry and residential area / EMC 1
EN 55011 (EN 55022) class B used in industry and residential area / EMC 1
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