STEP POWER power supplies for distribution boards
The STEP POWER power supply range was developed especially for building automation. The low idling losses and high degree of efficiency ensure maximum energy efficiency. They allow flexible use and can be snapped onto the DIN rail or screwed onto an even surface.
STEP-PS/ 1AC/24DC/1.75
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Power supply unit
2868648
Primary-switched STEP POWER power supply for DIN rail mounting, input: 1-phase, output: 24 V DC/1.75 A
Product details
| AC operation | |
| Nominal input voltage range | 100 V AC ... 240 V AC |
| Input voltage range | 85 V AC ... 264 V AC |
| 95 V DC ... 250 V DC | |
| Input voltage range AC | 85 V AC ... 264 V AC |
| Input voltage range DC | 95 V DC ... 250 V DC |
| Voltage type of supply voltage | AC/DC |
| Inrush current | < 15 A (typical) |
| Inrush current integral (I2t) | < 0.6 A2s |
| AC frequency range | 45 Hz ... 65 Hz |
| Frequency range DC | 0 Hz |
| Mains buffering time | typ. 25 ms (120 V AC) |
| typ. 150 ms (230 V AC) | |
| Current consumption | 0.6 A (120 V AC) |
| 0.3 A (230 V AC) | |
| Nominal power consumption | 84.2 VA |
| Protective circuit | Transient surge protection; Varistor |
| Power factor (cos phi) | 0.57 |
| Typical response time | < 0.5 s |
| Input fuse | 3.15 A (slow-blow, internal) |
| Recommended breaker for input protection | 6 A ... 16 A (Characteristics B, C, D, K) |
| Efficiency | > 89 % (for 230 V AC and nominal values) |
| Output characteristic | U/I |
| Nominal output voltage | 24 V DC |
| Setting range of the output voltage (USet) | 22.5 V DC ... 29.5 V DC (> 24 V DC, constant capacity restricted) |
| Output current Imax | 3.75 A |
| Nominal output current (IN) | 1.75 A (-25 °C ... 55 °C) |
| 1.9 A (-25 °C ... 40 °C permanent) | |
| 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 %) |
| < 2 % (change in load, dynamic 10 % ... 90 %) | |
| < 0.1 % (change in input voltage ±10 %) | |
| Residual ripple | < 60 mVPP (20 MHz) |
| Short-circuit-proof | yes |
| Output power | 42 W |
| Peak switching voltages nominal load | < 40 mVPP (20 MHz) |
| Maximum no-load power dissipation | < 0.7 W |
| Power loss nominal load max. | 5 W |
| Rise time | < 0.5 s (UOUT (10 % ... 90 %)) |
| Connection in parallel | yes, for redundancy and increased capacity |
| 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 |
| 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 |
| Number of phases | 1.00 |
| Insulation voltage input/output | 4 kV AC (type test) |
| 3.75 kV AC (routine test) | |
| Insulation voltage output / PE | 500 V DC (routine test) |
| Insulation voltage input/output | 3.75 kV AC (routine test) |
| 4 kV AC (type test) | |
| Insulation voltage input / PE | 3.5 kV AC (type test) |
| 2 kV AC (routine test) |
| Product type | Power supply |
| Product family | STEP POWER |
| MTBF (IEC 61709, SN 29500) | > 1569000 h (40 °C) |
| Data management status | |
| Article revision | 05 |
| Insulation characteristics | |
| Protection class | II (in closed control cabinet) |
| Overvoltage category | III |
| Degree of pollution | 2 |
| Dimensional drawing |
|
| Width | 54 mm |
| Height | 90 mm |
| Depth Device depth (DIN rail mounting) | 55 mm (Device depth (DIN rail mounting)) |
| Horizontal pitch | 3 Div. |
| Installation dimensions | |
| Installation distance right/left | 0 mm / 0 mm |
| Installation distance top/bottom | 30 mm / 30 mm |
| Mounting type | DIN rail mounting |
| Assembly note | alignable: 0 mm horizontally, 30 mm vertically |
| Mounting position | horizontal DIN rail NS 35, EN 60715 |
| With protective coating | no |
| 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) |
| 15 Hz ... 150 Hz, 2.3g, 90 min. | |
| Temp code | T4A (70 °C) |
| 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 |
| CSA | CSA-C22.2 No. 107.1-01 |
| Shipbuilding approval | DNV GL (EMC B) ABS, NK |
| UL approvals | UL/C-UL listed UL 508 |
| UL/C-UL Recognized UL 60950-1 | |
| UL ANSI/ISA-12.12.01 Class I, Division 2, Groups A, B, C, D T4A (Hazardous Location) | |
| NEC Class 2 as per UL 1310 | |
| Conformity/Approvals | |
| SIL in accordance with IEC 61508 | 0 |
| Low Voltage Directive | Conformance with Low Voltage Directive 2014/35/EC |
| EMC requirements for noise emission | EN 61000-6-3 |
| EN 61000-6-4 | |
| EMC requirements for noise immunity | EN 61000-6-1 |
| EN 61000-6-2 | |
| Electromagnetic compatibility | Conformance with EMC Directive 2014/30/EU |
| Electrostatic discharge | |
| Standards/regulations | EN 61000-4-2 |
| Electrostatic discharge | |
| Contact discharge | 6 kV (Test Level 3) |
| Discharge in air | 8 kV (Test Level 3) |
| Comments | Criterion A |
| Electromagnetic HF field | |
| Standards/regulations | EN 61000-4-3 |
| Electromagnetic HF field | |
| 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 |
| Fast transients (burst) | |
| Input | 4 kV (Test Level 4 - asymmetrical) |
| Output | 2 kV (Test Level 3 - asymmetrical) |
| Comments | Criterion A |
| Surge voltage load (surge) | |
| Standards/regulations | EN 61000-4-5 |
| Surge voltage load (surge) | |
| Input | 1 kV (Test Level 2 - symmetrical) |
| 2 kV (Test Level 3 - asymmetrical) | |
| Output | 0.5 kV (Test Level 1 - symmetrical) |
| 0.5 kV (Test Level 1 - asymmetrical) | |
| Comments | Criterion B |
| Conducted interference | |
| Standards/regulations | EN 61000-4-6 |
| Conducted interference | |
| Frequency range | 10 kHz ... 15 kHz |
| 10 kHz ... 15 kHz | |
| Comments | Criterion A |
| Criterion A | |
| Voltage | 3 V (Test Level 2) |
| 3 V (Test Level 2) | |
| Conducted interference | |
| Frequency range | 10 kHz ... 15 kHz |
| 10 kHz ... 15 kHz | |
| Comments | Criterion A |
| Criterion A | |
| Voltage | 3 V (Test Level 2) |
| 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 |
UL Recognized
Approval ID: FILE E 214596IECEE CB Scheme
Approval ID: DK-36104-M1-ULEAC
Approval ID: EAC-ZulassungNK
Approval ID: TA19644MEAC
Approval ID: RU S-DE.BL08.W.00764UL Listed
Approval ID: E123528cUL Listed
Approval ID: E123528BSH
Approval ID: 581ABS
Approval ID: 23-2446587-PDAEAC
Approval ID: RU S-DE.BL08.W.00764DNV
Approval ID: TAA00001YDIECEE CB Scheme
Approval ID: DE/PTZ/0102ABS
Approval ID: 18-HG1797199_PDAcUL Listed
Approval ID: E199827UL Listed
Approval ID: E199827cULus Recognized
cULus Listed
cULus Listed
Your advantages
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