Proax
Currency
0 Items
Products
Manufacturers
Expertise
About UsBlogQuick OrderContact UsClearance
proax logo
Cart
Phoenix Contact 2904945
AllPower ProductsPower supply
Phoenix ContactOfficial Distributor

By Phoenix Contact

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 range100 V AC ... 277 V AC
Input voltage range85 V AC ... 305 V AC
Input voltage range95 V DC ... 250 V DC
Input Voltage Range AC85 V AC ... 305 V AC
Input voltage range DC95 V DC ... 250 V DC
Voltage type of supply voltageAC/DC
Inrush Current< 40 A (typical)
Inrush current integral (I2t)< 2.8 A2s
AC frequency range45 Hz ... 65 Hz
Frequency range DC0 Hz
Mains buffering timetyp. 25 ms (120 V AC)
Mains buffering timetyp. 160 ms (277 V AC)
Current consumption1.43 A (120 V AC)
Current consumption0.75 A (277 V AC)
Nominal Power Consumption147.7 VA
Power factor (cos phi)0.64
Typical response time< 0.5 s
Input fuse4 A (slow-blow, internal)
Permissible backup fuseB6 B10 B16
Recommended breaker for input protection6 A ... 16 A (Characteristics B, C, D, K)

Output data

Efficiency> 88 % (for 277 V AC and nominal values)
Output characteristicU/I
Nominal Output Voltage24 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 Imax6 A
Nominal output current (IN)3.5 A (-25 °C ... 55 °C)
Derating55 °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 Power84 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 seriesyes

Input

Connection MethodScrew 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 length6.5 mm
Screw threadM3
Tightening torque, min0.5 Nm
Tightening torque max0.6 Nm

Output

Connection MethodScrew 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 length6.5 mm
Screw threadM3
Tightening torque, min0.5 Nm
Tightening torque max0.6 Nm

Signaling

Types of signalingLED
Operating voltage displayGreen LED

Signal output: LED status indicator

Status display"DC OK" LED green
Note on status displayUOUT > 21.5 V: LED lights up

Electrical properties

Number of phases1.00
Insulation voltage input/output4 kV AC (type test)
Insulation voltage input/output3.75 kV AC (routine test)
Insulation voltage input/output3.75 kV AC (routine test)
Insulation voltage input/output4 kV AC (type test)

Product properties

Product familySTEP POWER
MTBF (IEC 61709, SN 29500)> 1094000 h (40 °C)

Insulation characteristics

Protection classII
Overvoltage categoryIII
Degree of pollution2

Dimensions

Width90 mm
Height90 mm
Depth61 mm
Horizontal pitch5 Div.

Installation dimensions

Installation distance right/left0 mm / 0 mm
Installation distance top/bottom30 mm / 30 mm

Mounting

Mounting TypeDIN rail mounting
Assembly instructionsalignable: 0 mm horizontally, 30 mm vertically
Mounting Positionhorizontal DIN rail NS 35, EN 60715
With protective coatingNo

Material specifications

Housing MaterialPlastic
Housing MaterialPolycarbonate
Foot latch materialPOM (Polyoxymethylene)

Ambient conditions

Degree of ProtectionIP20
Ambient Temperature (Operation)-25 °C ... 70 °C (> 55° C derating : 2.5%/K)
Ambient temperature (storage/transport)-40 °C ... 85 °C
Climatic class3K3 (in acc. with EN 60721)
Max. permissible relative humidity (operation)≤ 95 % (at 25 °C, non-condensing)
Shock18 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 applicationsEN 50121-4
Standard – Electronic equipment for use in electrical power installations and their assembly into electrical power installationsEN 50178/VDE 0160 (PELV)
Standard – Limitation of mains harmonic currentsEN 61000-3-2
Standard - Electrical safetyIEC 62368-1 (SELV)
Standard – Protection against shock currents, basic requirements for protective separation in electrical equipmentEN 50178
Standard – Safety extra-low voltageIEC 62368-1 (SELV) und EN 60204-1 (PELV)
Standard - Safe isolationDIN VDE 0100-410
Standard - Safety of transformersEN 61558-2-16

Approvals

UL approvalsUL/C-UL listed UL 508
UL approvalsUL/C-UL Recognized UL 60950-1
UL approvalsNEC Class 2 as per UL 1310

Conformity/Approvals

SIL in accordance with IEC 615080

EMC data

Low Voltage DirectiveConformance with Low Voltage Directive 2014/35/EC
EMC requirements for noise emissionEN 61000-6-3
EMC requirements for noise emissionEN 61000-6-4
EMC requirements for noise immunityEN 61000-6-1
EMC requirements for noise immunityEN 61000-6-2
Electromagnetic compatibilityConformance with EMC Directive 2014/30/EU

Electrostatic discharge

Standards/regulationsEN 61000-4-2
Contact discharge6 kV (Test Level 3)
Discharge in air8 kV (Test Level 3)
CommentsCriterion B

Electromagnetic HF field

Standards/regulationsEN 61000-4-3
Frequency Range80 MHz ... 1 GHz
Test field strength10 V/m
Frequency Range1 GHz ... 2 GHz
Test field strength10 V/m
Frequency Range2 GHz ... 3 GHz
Test field strength10 V/m
CommentsCriterion A

Fast transients (burst)

Standards/regulationsEN 61000-4-4
Input4 kV (Test Level 4 - asymmetrical)
Output2 kV (Test Level 3 - asymmetrical)
CommentsCriterion B

Surge voltage load (surge)

Standards/regulationsEN 61000-4-5
Input1 kV (Test Level 2 - symmetrical)
Input2 kV (Test Level 3 - asymmetrical)
Output0.5 kV (Test Level 1 - symmetrical)
Output0.5 kV (Test Level 1 - asymmetrical)
CommentsCriterion B

Conducted interference

Standards/regulationsEN 61000-4-6
Frequency Range10 kHz ... 15 kHz
Frequency Range10 kHz ... 15 kHz
CommentsCriterion A
CommentsCriterion A
Voltage3 V (Test Level 2)
Voltage3 V (Test Level 2)
Frequency Range10 kHz ... 15 kHz
Frequency Range10 kHz ... 15 kHz
CommentsCriterion A
CommentsCriterion A
Voltage3 V (Test Level 2)
Voltage3 V (Test Level 2)

Voltage dips

Standards/regulationsEN 61000-4-11

Emitted interference

Standards/regulationsEN 61000-6-3
Radio interference voltage in acc. with EN 55011EN 55011 (EN 55022) class B used in industry and residential area / EMC 1
Emitted radio interference in acc. with EN 55011EN 55011 (EN 55022) class B used in industry and residential area / EMC 1
Accessories
  • Phoenix Contact2907916
    2907916
    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

Why Proax for Phoenix Contact 2904945?

Proax is an authorized distributor of Phoenix Contact 2904945 and one of Phoenix Contact's largest distributors in North America. Our highly skilled in-house technical team is ready to assist with any technical needs.

Have a question in mind? to help you get the right product as quickly as possible for your project. We're always here to help!

Short Lead Time
Highly Trained Staff
Live Chat
Technical Support
Local Inventory
60+ Years Experience
Additional Information

Pack Size1
Recommended
  • Phoenix Contact2868716
    2868716
    Power supply unit - STEP-PS/48AC/24DC/0.5
  • Phoenix Contact2868567
    2868567
    2868567 - Primary-switched STEP POWER power supply for DIN rail mounting, input: 1-phase, output: 12 V DC/1.5 A
  • Phoenix Contact2868554
    2868554
    Power supply unit - STEP-PS/ 1AC/12DC/1.5/FL
  • Phoenix Contact2868538
    2868538
    Power supply unit - STEP-PS/ 1AC/12DC/1
  • Phoenix Contact2868570
    2868570
    2868570 - Primary-switched STEP POWER power supply for DIN rail mounting, input: 1-phase, output: 12 V DC/3 A
  • Phoenix Contact2868583
    2868583
    Power supply unit - STEP-PS/ 1AC/12DC/5
  • Phoenix Contact2868619
    2868619
    Power supply unit - STEP-PS/ 1AC/15DC/4
  • Phoenix Contact2868596
    2868596
    2868596 - Primary-switched STEP POWER power supply for DIN rail and direct mounting, input: 1-phase, output: 24 V DC/0.5 A
  • Phoenix Contact2868635
    2868635
    2868635 - Primary-switched STEP POWER power supply for DIN rail mounting, input: 1-phase, output: 24 V DC/0.75 A
  • Phoenix Contact2868622
    2868622
    2868622 - Primary-switched STEP POWER power supply for DIN rail mounting, input: 1-phase, output: 24 V DC/0.75 A
  • Phoenix Contact2868648
    2868648
    2868648 - Primary-switched STEP POWER power supply for DIN rail mounting, input: 1-phase, output: 24 V DC/1.75 A
  • Phoenix Contact2868651
    2868651
    Power supply unit - STEP-PS/ 1AC/24DC/2.5
  • Phoenix Contact2868677
    2868677
    Power supply unit - STEP-PS/ 1AC/24DC/3.8/C2LPS
  • Phoenix Contact2868664
    2868664
    Power supply unit - STEP-PS/ 1AC/24DC/4.2
  • Phoenix Contact2868680
    2868680
    2868680 - Primary-switched power supply, STEP POWER, screw connection, DIN rail mounting, input: 1-phase, output: 48 V DC / 2 A, adjustable from 30 V DC ... 56 V DC, PoE application up to 96 W
  • Phoenix Contact2320513
    2320513
    2320513 - Primary-switched STEP POWER power supply for DIN rail and direct mounting, input: 1-phase, output: 5 V DC/2 A
  • Phoenix Contact2868541
    2868541
    Power supply unit - STEP-PS/ 1AC/ 5DC/6.5
  • Phoenix Contact1081430
    1081430
    Uninterruptible power supply - STEP-UPS/24DC/24DC/3/46WH
  • Phoenix Contact2868693
    2868693
    STEP-UPS/12DC/12DC/4, UPS modules with integrated energy storage are particularly space saving: UPS module and energy storage are combined in one housing. It's just a case of connecting a power supply upstream.
  • Phoenix Contact1082548
    1082548
    Uninterruptible power supply - STEP-UPS/12DC/12DC/4/46WH

Not in stock

Request lead time or order—we'll ensure quick delivery

Phoenix Contact Availability