2904945

https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Please be informed that the data shown in this PDF Document is generated from our Online Catalog. Please find the complete data in the user's documentation. Our General Terms of Use for Downloads are valid (http://phoenixcontact.com/download) DIN rail power supply unit 24 V DC/3.5 A, primary switched-mode, 1-phase. Product Description STEP POWER power supplies - for building technology Due to their design, the flat power supplies are particularly suitable for distribution boards and flat control panels. The power supply units are available with 24 V DC output voltage in various performance classes and overall widths as well as special voltages 5, 12, 15, and 48 V DC. Their high degree of efficiency and low standby losses ensure a high level of energy efficiency. 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 Key Commercial Data Packing unit 1 pc GTIN GTIN 4046356903875 Weight per Piece (excluding packing) 380.000 g Custom tariff number 85044030 Country of origin Germany Technical data Dimensions Width 90 mm Height 90 mm Depth 61 mm 08/01/2019   Page 1 / 7 https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Technical data 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 Max. permissible relative humidity (operation) ≤ 95 % (at 25 °C, non-condensing) Climatic class 3K3 (in acc. with EN 60721) Degree of pollution 2 Input data Nominal input voltage range 100 V AC ... 277 V AC Input voltage range 85 V AC ... 305 V AC 95 V DC ... 250 V DC AC frequency range 45 Hz ... 65 Hz Frequency range DC 0 Hz Current consumption 1.43 A (120 V AC) 0.75 A (277 V AC) Nominal power consumption 147.7 VA Inrush current < 40 A (typical) Mains buffering time typ. 25 ms (120 V AC) typ. 160 ms (277 V AC) Input fuse 4 A (slow-blow, internal) Recommended breaker for input protection 6 A ... 16 A (Characteristics B, C, D, K) Power factor (cos phi) 0.64 Output data 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) Nominal output current (IN) 3.5 A (-25 °C ... 55 °C) Output current Imax 6A Derating 55 °C ... 70 °C (2.5%/K) Connection in series yes 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 < 10 mVPP (20 MHz) Output power 84 W Typical response time < 0.5 s 08/01/2019   Page 2 / 7 https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Technical data Output data Peak switching voltages nominal load < 30 mVPP (20 MHz) Maximum power dissipation in no-load condition < 0.6 W Power loss nominal load max. 11.5 W General Net weight 0.3 kg Operating voltage display Green LED Efficiency > 88 % (for 277 V AC and nominal values) Insulation voltage input/output 4 kV AC (type test) 3.75 kV AC (routine test) Protection class II Degree of protection IP20 MTBF (IEC 61709, SN 29500) > 1094000 h (40 °C) Mounting position horizontal DIN rail NS 35, EN 60715 Assembly instructions alignable: 0 mm horizontally, 30 mm vertically Connection data, input Connection method Screw connection Conductor cross section solid min. 0.2 mm² Conductor cross section solid 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 Connection data, output Connection method Screw connection Conductor cross section solid min. 0.2 mm² Conductor cross section solid 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 Standards and Regulations 08/01/2019   Page 3 / 7 https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Technical data Standards and Regulations Electromagnetic compatibility Conformance with EMC Directive 2014/30/EU Noise immunity EN 61000-6-2:2005 Standards/regulations EN 61000-4-2 Contact discharge 4 kV (Test Level 2) Standards/regulations EN 61000-4-3 Frequency range 80 MHz ... 1 GHz Test field strength 10 V/m Frequency range 1.4 GHz ... 2 GHz Test field strength 3 V/m Standards/regulations EN 61000-4-4 Comments Criterion B Standards/regulations EN 61000-6-3 EN 61000-4-6 Frequency range 10 kHz ... 80 MHz Voltage 10 V (Test Level 3) Standards/regulations EN 61000-4-11 Low Voltage Directive Conformance with LV directive 2006/95/EC Standard - Safety of transformers EN 61558-2-16 Standard - Electrical safety IEC 60950-1/VDE 0805 (SELV) Standard – Electronic equipment for use in electrical power installations and their assembly into electrical power installations EN 50178/VDE 0160 (PELV) Standard – Safety extra-low voltage IEC 60950-1 (SELV) and EN 60204-1 (PELV) Standard - Safe isolation DIN VDE 0100-410 Standard – Protection against shock currents, basic requirements for protective separation in electrical equipment EN 50178 Standard – Limitation of mains harmonic currents EN 61000-3-2 UL approvals UL/C-UL listed UL 508 UL/C-UL Recognized UL 60950-1 NEC Class 2 as per UL 1310 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. Certificate CB Scheme Rail applications EN 50121-4 Environmental Product Compliance Lead 7439-92-1 China RoHS Environmentally Friendly Use Period = 25; 08/01/2019   Page 4 / 7 https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Technical data Environmental Product Compliance For details about hazardous substances go to tab “Downloads”, Category “Manufacturer's declaration” Classifications eCl@ss eCl@ss 4.0 27040702 eCl@ss 4.1 27040702 eCl@ss 5.0 27049002 eCl@ss 5.1 27049000 eCl@ss 6.0 27049000 eCl@ss 7.0 27049002 eCl@ss 8.0 27049002 eCl@ss 9.0 27040701 ETIM ETIM 4.0 EC002540 ETIM 5.0 EC002540 ETIM 6.0 EC002540 ETIM 7.0 EC002540 UNSPSC UNSPSC 13.2 39121004 Approvals Approvals Approvals UL Listed / UL Recognized / cUL Recognized / IECEE CB Scheme / cUL Listed / EAC / cULus Recognized / cULus Listed Ex Approvals Approval details 08/01/2019   Page 5 / 7 https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Approvals UL Listed    http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm  FILE E 123528 UL Recognized    http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm  FILE E 214596 cUL Recognized    http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm  FILE E 214596 IECEE CB Scheme    http://www.iecee.org/  DK-43974-UL cUL Listed    http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm  FILE E 123528 EAC      RU CDE.A*30.B.01082 cULus Recognized       cULus Listed       Accessories Accessories Device protection 08/01/2019   Page 6 / 7 https://www.phoenixcontact.com/us/products/2904945 Power supply unit - STEP-PS/277AC/24DC/3.5 - 2904945 Accessories Type 3 surge protection device - PLT-SEC-T3-24-FM-UT - 2907916 Type 3 surge protection, consisting of protective plug and base element, with integrated status indicator and remote signaling for single-phase power supply networks. Nominal voltage 24 V AC/DC.     Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com 08/01/2019   Page 7 / 7