Official Distributor
SKU
MPN
STEP-PS/277AC/24DC/3.5
Weight
0.397 kg
Series STEP-PS
STEP-PS/277AC/24DC/3.5 - Power supply unit
DIN rail power supply unit 24 V DC/3.5 A, primary switched-mode, 1-phase.
- Flexible mounting by simply snapping onto the DIN rail or screwing onto a level surface
- Reliable power supply thanks to high MTBF (mean time between failures) of more than 500,000 hours and U/I characteristic curve
- Energy savings thanks to maximum energy efficiency and incredibly low idling losses
Technical Specifications
AC operation
Nominal input voltage range | 100 V AC ... 277 V AC |
Input voltage range | 85 V AC ... 305 V AC |
Input voltage range | 95 V DC ... 250 V DC |
Input Voltage Range AC | 85 V AC ... 305 V AC |
Input voltage range DC | 95 V DC ... 250 V DC |
Voltage type of supply voltage | AC/DC |
Inrush Current | < 40 A (typical) |
Inrush current integral (I2t) | < 2.8 A2s |
AC frequency range | 45 Hz ... 65 Hz |
Frequency range DC | 0 Hz |
Mains buffering time | typ. 25 ms (120 V AC) |
Mains buffering time | typ. 160 ms (277 V AC) |
Current consumption | 1.43 A (120 V AC) |
Current consumption | 0.75 A (277 V AC) |
Nominal Power Consumption | 147.7 VA |
Power factor (cos phi) | 0.64 |
Typical response time | < 0.5 s |
Input fuse | 4 A (slow-blow, internal) |
Permissible backup fuse | B6 B10 B16 |
Recommended breaker for input protection | 6 A ... 16 A (Characteristics B, C, D, K) |
Output data
Efficiency | > 88 % (for 277 V AC and nominal values) |
Output characteristic | U/I |
Nominal Output Voltage | 24 V DC ±1 % |
Setting range of the output voltage (USet) | 22.5 V DC ... 25 V DC (> 24 V DC, constant capacity restricted) |
Output current Imax | 6 A |
Nominal output current (IN) | 3.5 A (-25 °C ... 55 °C) |
Derating | 55 °C ... 70 °C (2.5 %/K) |
Feedback voltage resistance | ≤ 35 V DC |
Protection against overvoltage at the output (OVP) | < 35 V DC |
Control deviation | < 1 % (change in load, static 10 % ... 90 %) |
Control deviation | < 2 % (change in load, dynamic 10 % ... 90 %) |
Control deviation | < 0.1 % (change in input voltage ±10 %) |
Residual ripple | < 10 mVPP (20 MHz) |
Output Power | 84 W |
Peak switching voltages nominal load | < 30 mVPP (20 MHz) |
Maximum no-load power dissipation | < 0.6 W |
Power loss nominal load max. | 11.5 W |
Rise time | < 0.5 s (UOUT (10 % ... 90 %)) |
Connection in series | yes |
Input
Connection Method | Screw connection |
Conductor cross section, rigid min. | 0.2 mm² |
Conductor cross section, rigid max. | 2.5 mm² |
Conductor cross section flexible min. | 0.2 mm² |
Conductor cross section flexible max. | 2.5 mm² |
Conductor cross section AWG min. | 24 |
Conductor cross section AWG max. | 12 |
Stripping length | 6.5 mm |
Screw thread | M3 |
Tightening torque, min | 0.5 Nm |
Tightening torque max | 0.6 Nm |
Output
Connection Method | Screw connection |
Conductor cross section, rigid min. | 0.2 mm² |
Conductor cross section, rigid max. | 2.5 mm² |
Conductor cross section flexible min. | 0.2 mm² |
Conductor cross section flexible max. | 2.5 mm² |
Conductor cross section AWG min. | 24 |
Conductor cross section AWG max. | 12 |
Stripping length | 6.5 mm |
Screw thread | M3 |
Tightening torque, min | 0.5 Nm |
Tightening torque max | 0.6 Nm |
Signaling
Types of signaling | LED |
Operating voltage display | Green LED |
Signal output: LED status indicator
Status display | "DC OK" LED green |
Note on status display | UOUT > 21.5 V: LED lights up |
Electrical properties
Number of phases | 1.00 |
Insulation voltage input/output | 4 kV AC (type test) |
Insulation voltage input/output | 3.75 kV AC (routine test) |
Insulation voltage input/output | 3.75 kV AC (routine test) |
Insulation voltage input/output | 4 kV AC (type test) |
Product properties
Product family | STEP POWER |
MTBF (IEC 61709, SN 29500) | > 1094000 h (40 °C) |
Insulation characteristics
Protection class | II |
Overvoltage category | III |
Degree of pollution | 2 |
Dimensions
Width | 90 mm |
Height | 90 mm |
Depth | 61 mm |
Horizontal pitch | 5 Div. |
Installation dimensions
Installation distance right/left | 0 mm / 0 mm |
Installation distance top/bottom | 30 mm / 30 mm |
Mounting
Mounting Type | DIN rail mounting |
Assembly instructions | alignable: 0 mm horizontally, 30 mm vertically |
Mounting Position | horizontal DIN rail NS 35, EN 60715 |
With protective coating | No |
Material specifications
Housing Material | Plastic |
Housing Material | Polycarbonate |
Foot latch material | POM (Polyoxymethylene) |
Ambient conditions
Degree of Protection | IP20 |
Ambient Temperature (Operation) | -25 °C ... 70 °C (> 55° C derating : 2.5%/K) |
Ambient temperature (storage/transport) | -40 °C ... 85 °C |
Climatic class | 3K3 (in acc. with EN 60721) |
Max. permissible relative humidity (operation) | ≤ 95 % (at 25 °C, non-condensing) |
Shock | 18 ms, 30g, in each space direction (according to IEC 60068-2-27) |
Vibration (Operation) | < 15 Hz, amplitude ±2.5 mm (according to IEC 60068-2-6) |
Vibration (Operation) | 15 Hz ... 150 Hz, 2.3g, 90 min. |
Standards and Regulations
Rail applications | EN 50121-4 |
Standard – Electronic equipment for use in electrical power installations and their assembly into electrical power installations | EN 50178/VDE 0160 (PELV) |
Standard – Limitation of mains harmonic currents | EN 61000-3-2 |
Standard - Electrical safety | IEC 62368-1 (SELV) |
Standard – Protection against shock currents, basic requirements for protective separation in electrical equipment | EN 50178 |
Standard – Safety extra-low voltage | IEC 62368-1 (SELV) und EN 60204-1 (PELV) |
Standard - Safe isolation | DIN VDE 0100-410 |
Standard - Safety of transformers | EN 61558-2-16 |
Approvals
UL approvals | UL/C-UL listed UL 508 |
UL approvals | UL/C-UL Recognized UL 60950-1 |
UL approvals | NEC Class 2 as per UL 1310 |
Conformity/Approvals
SIL in accordance with IEC 61508 | 0 |
EMC data
Low Voltage Directive | Conformance with Low Voltage Directive 2014/35/EC |
EMC requirements for noise emission | EN 61000-6-3 |
EMC requirements for noise emission | EN 61000-6-4 |
EMC requirements for noise immunity | EN 61000-6-1 |
EMC requirements for noise immunity | EN 61000-6-2 |
Electromagnetic compatibility | Conformance with EMC Directive 2014/30/EU |
Electrostatic discharge
Standards/regulations | EN 61000-4-2 |
Contact discharge | 6 kV (Test Level 3) |
Discharge in air | 8 kV (Test Level 3) |
Comments | Criterion B |
Electromagnetic HF field
Standards/regulations | EN 61000-4-3 |
Frequency Range | 80 MHz ... 1 GHz |
Test field strength | 10 V/m |
Frequency Range | 1 GHz ... 2 GHz |
Test field strength | 10 V/m |
Frequency Range | 2 GHz ... 3 GHz |
Test field strength | 10 V/m |
Comments | Criterion A |
Fast transients (burst)
Standards/regulations | EN 61000-4-4 |
Input | 4 kV (Test Level 4 - asymmetrical) |
Output | 2 kV (Test Level 3 - asymmetrical) |
Comments | Criterion B |
Surge voltage load (surge)
Standards/regulations | EN 61000-4-5 |
Input | 1 kV (Test Level 2 - symmetrical) |
Input | 2 kV (Test Level 3 - asymmetrical) |
Output | 0.5 kV (Test Level 1 - symmetrical) |
Output | 0.5 kV (Test Level 1 - asymmetrical) |
Comments | Criterion B |
Conducted interference
Standards/regulations | EN 61000-4-6 |
Frequency Range | 10 kHz ... 15 kHz |
Frequency Range | 10 kHz ... 15 kHz |
Comments | Criterion A |
Comments | Criterion A |
Voltage | 3 V (Test Level 2) |
Voltage | 3 V (Test Level 2) |
Frequency Range | 10 kHz ... 15 kHz |
Frequency Range | 10 kHz ... 15 kHz |
Comments | Criterion A |
Comments | Criterion A |
Voltage | 3 V (Test Level 2) |
Voltage | 3 V (Test Level 2) |
Voltage dips
Standards/regulations | EN 61000-4-11 |
Emitted interference
Standards/regulations | EN 61000-6-3 |
Radio interference voltage in acc. with EN 55011 | EN 55011 (EN 55022) class B used in industry and residential area / EMC 1 |
Emitted radio interference in acc. with EN 55011 | EN 55011 (EN 55022) class B used in industry and residential area / EMC 1 |
Accessories
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