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 24VDC output voltage in various performance classes and overall widths as well as special voltages 5, 12, 15, and 48VDC. 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 03/30/2021Page1/8 https://www.phoenixcontact.com/us/products/2904945 Power supply unit-STEP-PS/277AC/24DC/3.5-2904945 Technical data Dimensions Depth 61 mm Installation distance right/left 0 mm / 0 mm Installation distance top/bottom 30 mm / 30 mm 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 VAC ... 277 VAC Input voltage range 85 VAC ... 305 VAC 95 VDC ... 250 VDC AC frequency range 45 Hz ... 65 Hz Frequency range DC 0 Hz Current consumption 1.43 A (120VAC) 0.75 A (277VAC) Nominal power consumption 147.7 VA Inrush current < 40 A (typical) Mains buffering time typ. 25 ms (120VAC) typ. 160 ms (277VAC) 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 VDC 1% Setting range of the output voltage (USet) 22.5 VDC ... 25 VDC (> 24 VDC, constant capacity restricted) Nominal output current (IN) 3.5 A (-25C...55C) Output current Imax 6A Derating 55 C ... 70 C (2.5%/K) Connection in series yes Feedback voltage resistance 35 VDC Protection against overvoltage at the output (OVP) < 35 VDC Control deviation < 1 % (change in load, static 10 % ... 90 %) < 2 % (change in load, dynamic 10 % ... 90 %) 03/30/2021Page2/8 https://www.phoenixcontact.com/us/products/2904945 Power supply unit-STEP-PS/277AC/24DC/3.5-2904945 Technical data Output data < 0.1 % (change in input voltage 10 %) Residual ripple < 10 mVPP (20MHz) Output power 84 W Typical response time < 0.5 s Peak switching voltages nominal load < 30 mVPP (20MHz) 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) MTBF (IEC 61709, SN 29500) > 1094000 h (40C) Insulation voltage input/output 4 kV AC (type test) 3.75 kV AC (routine test) Degree of protection IP20 Protection class II Housing material Polycarbonate Foot latch material POM (Polyoxymethylen) Mounting position horizontal DIN rail NS 35, EN 60715 Assembly instructions alignable: 0mm horizontally, 30mm vertically Connection data, input Connection method Screw connection Conductor cross section solid min. 0.2 mm Conductor cross section solid max. 2.5 mm Conductor cross section flexible min. 0.2 mm Conductor cross section flexible max. 2.5 mm 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 mm Conductor cross section solid max. 2.5 mm Conductor cross section flexible min. 0.2 mm Conductor cross section flexible max. 2.5 mm 03/30/2021Page3/8 https://www.phoenixcontact.com/us/products/2904945 Power supply unit-STEP-PS/277AC/24DC/3.5-2904945 Technical data Connection data, output Conductor cross section AWG min. 24 Conductor cross section AWG max. 12 Stripping length 6.5 mm Screw thread M3 Standards EMC requirements for noise immunity EN61000-6-1 EN61000-6-2 EMC requirements for noise emission EN61000-6-3 EN61000-6-4 Standard - Safety of transformers EN61558-2-16 Standard - Electrical safety IEC60950-1/VDE0805 (SELV) Standard - Electronic equipment for use in electrical power installations and their assembly into electrical power installations EN50178/VDE0160 (PELV) Standard - Safety extra-low voltage IEC60950-1 (SELV) and EN60204-1 (PELV) Standard - Safe isolation DINVDE0100-410 Standard - Protection against shock currents, basic requirements for protective separation in electrical equipment EN50178 Standard - Limitation of mains harmonic currents EN61000-3-2 Rail applications EN50121-4 Conformance/approvals UL approvals UL/C-UL listed UL 508 UL/C-UL Recognized UL 60950-1 NEC Class 2 as per UL 1310 EMC data Electromagnetic compatibility Conformance with EMC Directive 2014/30/EU Low Voltage Directive Conformance with Low Voltage Directive 2014/35/EC Electrostatic discharge EN 61000-4-2 Contact discharge 6 kV (Test Level 3) Discharge in air 8 kV (Test Level 3) Electromagnetic HF field EN61000-4-3 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 03/30/2021Page4/8 https://www.phoenixcontact.com/us/products/2904945 Power supply unit-STEP-PS/277AC/24DC/3.5-2904945 Technical data EMC data Fast transients (burst) EN61000-4-4 Input 4 kV (Test Level 4 - asymmetrical) Output 2 kV (Test Level 3 - asymmetrical) Comments Criterion B Surge voltage load (surge) EN61000-4-5 Input 2 kV (Test Level 3 - symmetrical) 4 kV (Test Level 4 - asymmetrical) Output 1 kV (Test Level 2 - symmetrical) 0.5 kV (Test Level 1 - asymmetrical) Comments Criterion B Conducted interference EN61000-4-6 Frequency range 10 kHz ... 15 kHz 0.15 MHz ... 80 MHz Voltage 3 V (Test Level 2) 10 V (Test Level 3) Comments Criterion A Criterion A Voltage dips EN61000-4-11 Environmental Product Compliance REACh SVHC Lead 7439-92-1 China RoHS Environmentally Friendly Use Period = 25; For details about hazardous substances go to tab "Downloads", Category "Manufacturer's declaration" Drawings Block diagram + + - - L (+) N (-) Classifications eCl@ss eCl@ss 10.0.1 27040701 03/30/2021Page5/8 https://www.phoenixcontact.com/us/products/2904945 Power supply unit-STEP-PS/277AC/24DC/3.5-2904945 Classifications eCl@ss eCl@ss 11.0 27040701 eCl@ss 4.0 27040700 eCl@ss 4.1 27040700 eCl@ss 5.0 27049000 eCl@ss 5.1 27049000 eCl@ss 6.0 27049000 eCl@ss 7.0 27049002 eCl@ss 9.0 27040701 ETIM ETIM 4.0 EC002540 ETIM 6.0 EC002540 ETIM 7.0 EC002540 UNSPSC UNSPSC 13.2 39121004 UNSPSC 18.0 39121004 UNSPSC 19.0 39121004 UNSPSC 20.0 39121004 UNSPSC 21.0 39121004 Approvals Approvals Approvals UL Listed / UL Recognized / cUL Recognized / IECEE CB Scheme / cUL Listed / EAC / cULus Recognized / cULus Listed Ex Approvals Approval details UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 123528 03/30/2021Page6/8 https://www.phoenixcontact.com/us/products/2904945 Power supply unit-STEP-PS/277AC/24DC/3.5-2904945 Approvals 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*DE*08.B.01873/19 cULus Recognized cULus Listed Accessories Accessories Device protection Type 3 surge protection device-PLT-SEC-T3-24-FM-UT-2907916 Type3 surge protection, consisting of protective plug and base element, with integrated status indicator and remote signaling for single-phase power supply networks. Nominal voltage: 24VAC/DC 03/30/2021Page7/8 https://www.phoenixcontact.com/us/products/2904945 Phoenix Contact 2021 (c) - all rights reserved http://www.phoenixcontact.com 03/30/2021Page8/8