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

(Ordine n.: 2903155)

Fenice Contact 2nd-generation TRIO POWER DIN rail mounted industrial switching Alimentazione elettrica, 3-phase AC input, 24V DC/20A output, Dynamic Boost 30A for 5 secondi, Push-in tool-free spring terminals. Typically used for 24V power supply to PLCS, isole valvole, 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 Alimentazione elettrica

3AC: 3-phase AC input

24DC: 24Uscita V CC

20: Rated output current 20A

📋 Full Technical Specifications

Lato ingresso

Tensione in ingresso: 3×400～500V AC (tolleranza: -20% ~ +15%)

Frequenza: 50/60Hz

Tempo di attesa: >10ms @400VAC

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

Protezione dell'ingresso: Recommended upstream 3P 10A/16A type B circuit breaker

Lato di uscita

Valutato: 24A DC / 20UN, 480W

Dynamic Boost: 30UN, 5 secondi (for solenoid valves and motor inrush loads)

Adjustable output: 24～28V DC

Ondulazione & rumore: ≤20mVpp

Efficienza: Tip. >93% @400VAC full load

Protezione: Protezione da cortocircuito, protezione da sovracorrente, overtemperature protection, OVP overvoltage protection (OVP limit ≤30V DC)

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

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

Meccanico & Ambientale

Montaggio: Guida DIN standard da 35 mm

Dimensioni: W65 × H130 × D160 mm

Peso netto: Approx.1.5kg

Classe di protezione: IP20 (installazione dell'armadio)

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

MTBF: >1,800,000h @25℃ (IEC61709)

🛠️ Wiring Notes

1. Ingresso: 3-phase L1/L2/L3 + Terra di protezione PE. The unit can still operate with phase loss, but DC OK signal will trigger an alarm.
2. Produzione: CC+ / 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 & Sostituzione

1. 2seconda generazione: TRIO-PS-2G/3AC/24DC/20 (2903155, modello attuale)
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.

⚠️ Common Troubleshooting

1. DC OK indicator off, nessuna uscita

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, voltage drop under load

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

Confirm load does not continuously exceed 20A (Boost only lasts 5 secondi, 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

Automazione delle macchine utensili, linee di confezionamento, metallurgy auxiliary control, large control cabinets, centralized power supply for PLC, isole valvole, 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, Montaggio su guida DIN, parallel redundancy support, adjustable 24~28V output, IP20, -25~70℃.

Nota: 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:

Fenice: 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℃; Innovazione & Great Wall have similar curve; Meanwell TDR requires derating at full load near 70℃
5. EMC: 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: Solo indicatore LED, 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. Standard replacement: 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) Elenco completo dei modelli

Series common features: Montaggio su guida DIN, Terminali a molla push-in, 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, your target series)

📌 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. Nota di sostituzione: 2nd-gen TRIO-PS-2G phasing out; new projects prefer TRIO3 3rd generation

📎 Matching Accessories (Common for the series)

Modulo di ridondanza: 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)

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

1. Power system accessories (TRIO family, ridondanza & protezione)
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 (20UN). 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. Gruppo di continuità UPS

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

1. Morsettiere (COMPLETE line PT series, Push-in)

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

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

III. Relè / optocoupler isolation modules (PLC output driving solenoids & contattori)

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

DIN rail pluggable relay module, 24VDC coil, 1NA+1NC; 6.2mm slim width, Indicatore di stato LED; replaceable relay cartridge, PLC IO isolation, suppress inductive load surge to IO points.

PLC-OPT-24DC/24DC/2: Optocoupler isolation module, nessun contatto meccanico, for high-frequency circuits.

1. Surge protection devices (SPD, lightning & transient surge protection)
2. VAL-MS 230/2: Single-phase 220V AC Type 2 protezione contro le sovratensioni, 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, fieldbus)

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

1. Industrial Switches (FL SWITCH series)

INTERRUTTORE FL 1005, 5-port unmanaged industrial Ethernet switch; INTERRUTTORE FL 2008 managed switch, ring redundancy support, wide temperature DIN rail mount, widely used in Profinet/EtherCAT networks.

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

MACX MCR series isolation transmitters

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

Explosion-proof application: MACX Ex intrinsic safety barriers for hazardous area instruments.

VIII. Relè di sicurezza (Circuiti di sicurezza, arresto di emergenza, cancelli di sicurezza)

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