Phoenix Contact TRIO-PS-2G/3AC/24DC/20 Industrial Switching Power Supply

(Bestell-Nr.: 2903155)

Phönix Contact 2nd-generation TRIO POWER DIN rail mounted industrial switching Stromversorgung, 3-phase AC input, 24V DC/20A output, Dynamic Boost 30A for 5 Sekunden, Push-in tool-free spring terminals. Typically used for 24V power supply to SPSS, valve islands, sensors and solenoid valve banks in machine tools and automation control cabinets, well suited for loads with inrush current.

✅ Model Decoding

TRIO-PS-2G: 2nd-generation TRIO POWER Stromversorgung

3Wechselstrom: 3-phase AC input

24Gleichstrom: 24V DC output

20: Rated output current 20A

📋 Full Technical Specifications

Eingangsseite

Eingangsspannung: 3×400~500V Wechselstrom (Toleranz: -20% ~ +15%)

Frequenz: 50/60Hz

Hold-up time: >10ms @400VAC

Terminals: L1/L2/L3/PE, Push-in tool-free spring terminals

Eingangsschutz: Recommended upstream 3P 10A/16A type B circuit breaker

Ausgangsseite

Bewertet: 24In DC / 20A, 480W

Dynamischer Boost: 30A, 5 Sekunden (for solenoid valves and motor inrush loads)

Adjustable output: 24~28V DC

Welligkeit & Lärm: ≤20mVpp

Effizienz: Typ. >93% @400VAC full load

Schutz: Kurzschlussschutz, Überstromschutz, overtemperature protection, OVP overvoltage protection (OVP limit ≤30V DC)

Signal: DC OK relay dry contact (max.30V AC/DC,100mA) for PLC fault remote indication

Parallel / series operation: ✅ Multiple units can be paralleled for capacity expansion or redundancy; ✅ Can be connected in series for higher voltage

Mechanisch & Umweltfreundlich

Montage: Standardmäßige 35-mm-DIN-Schiene

Abmessungen: W65 × H130 × D160 mm

Nettogewicht: Approx.1.5kg

Schutzklasse: IP20 (cabinet installation)

Betriebstemperatur: -25℃ ~ +70℃; derating starts above 60℃ at 2.5%/K; cold start down to -40℃

MTBF: >1,800,000h bei 25℃ (IEC61709)

🛠️ Wiring Notes

1. Eingang: 3-phase L1/L2/L3 + PE-Schutzerde. The unit can still operate with phase loss, but DC OK signal will trigger an alarm.
2. Ausgabe: DC+ / DC-. Direct parallel connection with automatic current sharing, no extra current sharing wire required. For redundant systems, a decoupling diode module is recommended.
3. DC OK: Passive relay contact. Closed when power supply healthy; opens upon power loss, fault or overtemperature, connected to PLC for fault diagnosis.

🔄 Upgrade & Ersatz

1. 2Generation: TRIO-PS-2G/3AC/24DC/20 (2903155, aktuelles Modell)
2. 3rd generation upgrade: TRIO3-PS/3AC/24DC/20 (2186227). Pin-out and mounting dimensions fully compatible, improved EMC and reliability, direct drop-in replacement.

⚠️ Allgemeine Fehlerbehebung

1. DC OK indicator off, keine Ausgabe

Check for missing phase, loose wiring or tripped upstream circuit breaker

Overtemperature protection activated: Check cabinet ventilation and ambient temperature

2. Normal voltage at no-load, Spannungsabfall unter Last

Verify reliable Push-in connection of output terminals; insufficient output cable cross-section

Confirm load does not continuously exceed 20A (Boost only lasts 5 Sekunden, cannot sustain 30A continuously)

3. Protection trips immediately after power-up

Short circuit or ground fault on DC output side; isolate load and test power supply at no-load

📌 Application

Machine tool automation, Verpackungslinien, metallurgy auxiliary control, large control cabinets, centralized power supply for PLC, valve islands, sensors and 24V solenoid valve banks. Boost function ideal for heavy inrush loads.

Comparison List of Domestic Replacements for TRIO-PS-2G/3AC/24DC/20 (2903155)

Key characteristics of original unit: 3-phase 3×400~500VAC input, 24V 20A/480W, 150% short-time Boost (30A/5s), DC OK relay alarm, DIN-Schienenmontage, parallel redundancy support, adjustable 24~28V output, IP20, -25~70℃.

Notiz: Meanwell is Taiwanese owned domestic brand; Inovance and Great Wall are mainland manufacturers. Meanwell TDR-480-24 is the preferred closest alternative.

📌 Key Selection Notes

1. Boost is critical: Original Phoenix delivers 30A for 5 seconds for solenoid banks and motor startup. Chuanglian CL-3AC480-24 has insufficient peak current, not allowed for inrush loads.
2. Terminal difference: Original Push-in tool-free; Meanwell TDR uses screw terminals requiring wiring modification; Inovance/Great Wall support optional Push-in terminals for minimal cabinet changes.
3. Parallel redundancy:

Phönix: Direct parallel of identical units with automatic current sharing

Inovance/Great Wall: Dedicated current sharing cable for better parallel performance

Meanwell TDR: Parallel possible, DR-RDN20 decoupling diode module recommended for fault isolation

4. Temperature derating: Original starts derating >60℃; Innovation & Great Wall have similar curve; Meanwell TDR requires derating at full load near 70℃
5. EMV: Phoenix EN61000-6-2 industrial immunity; Meanwell TDR and Inovance meet same EMC class, no extra filter required inside cabinet.

⚠️ Not Recommended Models

Single-phase power supplies (NDR/DR series): 220V single-phase input, cannot replace 3AC 3-phase models

Generic domestic 3-phase power supplies without DC OK relay: Only LED indicator, no PLC fault alarm, not suitable for automation equipment.

📋 Modification Effort Assessment

1. Minimal change: Inovance MD800-PS-3AC400-2420 (Push-in optional, similar dimension, matched parameters)
2. Standardersatz: Meanwell TDR-480-24 (good stock, widely verified; only change from Push-in to screw terminals)
3. Low-cost batch cabinet: Great Wall DR960S 3-phase variant for domestic system integration projects

Phoenix Contact TRIO-PS-2G (2nd Gen TRIO POWER) Vollständige Modellliste

Series common features: DIN-Schienenmontage, Push-in spring terminals, dynamic Boost overload, DC OK relay dry contact, -25℃~+70℃ wide temperature, parallel for expansion/redundancy, standard for machine automation.

1. Single-phase input 1AC (85~264VAC)

Derivative B+D versions (built-in protection)

TRIO-PS-2G/1AC/24DC/5/B+D Order No.:2902144

TRIO-PS-2G/1AC/24DC/10/B+D Order No.:2902145

1. 3-phase input 3AC (3×400~500VAC, Ihre Zielserie)

📌 Selection Guide

1. 1AC single-phase: Cabinet 220V supply; 3AC three-phase: Machine tools and large production lines with 380V cabinet input
2. Boost capability: All models support 150% short-time overload for 5s for solenoid and contactor inrush
3. C2LPS: Safety power supply variant for PL/Cat safety circuits; standard projects use non-C2LPS
4. B+D: Integrated DC-side electronic protection, may eliminate separate load protection module
5. Replacement note: 2nd-gen TRIO-PS-2G phasing out; new projects prefer TRIO3 3rd generation

📎 Matching Accessories (Common for the series)

Redundancy module: TRIO-DIODE/12-24DC/20 (20A anti-reverse diode for redundant power)

Electronic circuit breaker: CBM series, 24V multi-channel load protection

Phoenix Contact Matching Product Recommendations (Control Cabinet Automation, matched with TRIO power supply)

DIN-Schienenmontage, Push-in tool-free terminals, for machine tools and production line automation.

1. Power system accessories (TRIO family, Redundanz & Schutz)
2. QUINT POWER high performance power supply (high-end redundancy)

QUINT-PS/3AC/24DC/20, 3-phase 24V20A, predictive diagnostics and selective fuse breaking. First choice for non-stop critical equipment; higher grade than TRIO.

2. Redundancy diode module (for dual TRIO power redundant setup)

TRIO-DIODE/12-24DC/20 (20A). Two TRIO power supplies in parallel, fault isolation to prevent reverse current from failed unit.

3. CBM / CAPAROC electronic circuit breaker (24V branch protection)

CBM e4 24DC/0.5-10A NO-R, 4-channel adjustable electronic protection, alternative to fuses, fault alarm signal to PLC, standard for 24V sensor and valve island loops.

4. Unterbrechungsfreie USV-Stromversorgung

QUINT-UPS/24DC/20, 24V DC UPS, maintains PLC and controller data retention during short mains dropout.

1. Klemmenblöcke (COMPLETE line PT series, Einsteckbar)

PT2.5 (Order No.3209508): 2.5mm² general signal/power terminal, tool-free direct insertion, highest consumption in control cabinets

PT2.5-PE: Protective earth terminal, green-yellow

PT6: 6mm² high-current terminal, power input wiring

Vorteil: Common FBST jumpers, uniform marking strips, same Push-in technology as TRIO power supply for fast wiring.

III. Relais / optocoupler isolation modules (PLC output driving solenoids & Schütze)

PLC-RSC-24DC/21 (Order No.2966171)

DIN rail pluggable relay module, 24VDC-Spule, 1NO+1NC; 6.2mm slim width, LED-Statusanzeige; replaceable relay cartridge, PLC IO isolation, suppress inductive load surge to IO points.

PLC-OPT-24DC/24DC/2: Optocoupler isolation module, keine mechanischen Kontakte, for high-frequency circuits.

1. Surge protection devices (SPD, Blitz & transient surge protection)
2. VAL-MS 230/2: Single-phase 220V AC Type 2 Überspannungsschutz, cabinet mains inlet protection
3. VAL-MS 24DC: 24V DC side surge protection for sensors and fieldbus signals; hot-swappable module with remote alarm contact, fault feedback to PLC.
4. Distributed I/O modules (Axioline series, Feldbus)

Axioline F / Axioline Smart Elements, Profinet, EtherCAT distributed I/O, IP20 cabinet mount; Steckklemmen, high density, compatible with Phoenix PLC and PC WORX software, for large production line distributed signal acquisition.

1. Industrial Switches (FL SWITCH series)

FL SWITCH 1005, 5-Port Unmanaged Industrial Ethernet Switch; FL SWITCH 2008 managed switch, Unterstützung für Ringredundanz, wide temperature DIN rail mount, widely used in Profinet/EtherCAT networks.

VII. Signal Isolators / Intrinsic Safety Barriers (Process instrumentation, analog)

MACX MCR series isolation transmitters

4-20mA analog signal isolation, conversion and loop power supply; eliminates ground loop interference for pressure and temperature transmitters.

Explosionsgeschützte Anwendung: MACX Ex intrinsic safety barriers for hazardous area instruments.

VIII. Sicherheitsrelais (Sicherheitsschaltungen, Not-Aus, Sicherheitstore)

PSR series safety relay, PSR-SCP-24DC/ESD/5X1/1X2; for emergency stop buttons, safety doors and safety light curtains, PLd safety level, mandatory safety circuit for machine tools.

1. Controllers PLC / IPC

ILC compact PLC: Compact DIN rail controller, PC WORX programming, onboard I/O, for small & medium standalone machines

RFC high-end PLC: Redundant controller, large production lines and critical equipment; Profinet, Modbus TCP supported

📌 Recommended Complete Cabinet Bill of Material (based on TRIO-PS-2G/3AC/24DC/20)

3-phase mains inlet → VAL-MS 3-phase surge protector → TRIO 24V power supply → TRIO-DIODE redundancy module (dual power option) → CAPAROC electronic circuit breaker → PT terminal blocks → PLC-RSC relay modules + Axioline I/O + FL switch + PSR safety relay