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Brand: Phoenix Contact
Phoenix Contact TRIO-PS-2G/1AC/24DC/20 Power Supply 24 V 20 A
Description
TRIO-PS-2G/1AC/24DC/20 power supply, 24 V DC 20 A with push-in terminals
The TRIO-PS-2G/1AC/24DC/20 (item number 2903151) is a single-phase TRIO POWER second-generation supply that delivers 24 V DC at 20 A (480 W) in a slim 68 mm housing. Where the QUINT family adds preventive monitoring and SFB technology, the TRIO POWER range focuses on standard functionality at lower cost: a dynamic boost of 1.5 times the nominal current for five seconds, a DC OK signal, overvoltage protection on the output, and fast tool-free push-in wiring. Seven Star LLC supplies the TRIO-PS-2G/1AC/24DC/20 in Oman and the GCC as an independent supplier in Muscat for machine builders and plant projects that need a dependable 24 V bus without extra diagnostic features.
Reading the TRIO-PS-2G/1AC/24DC/20 designation
- TRIO-PS-2G: TRIO POWER power supply, second generation.
- 1AC: single-phase AC input.
- 24DC: 24 V DC output voltage.
- 20: nominal output current of 20 A.
TRIO-PS-2G/1AC/24DC/20 technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Phoenix Contact TRIO-PS-2G/1AC/24DC/20, item no. 2903151 |
| Nominal input voltage range | 100 V AC … 240 V AC (-15 % … +10 %); 110 V DC … 250 V DC |
| Input voltage range | 85 V AC … 264 V AC, derating below 100 V AC (2.5 %/V) |
| Frequency | 50 Hz … 60 Hz |
| Inrush current | ≤ 20 A typical at 25 °C; I2t < 0.9 A2s |
| Input fuse | 10 A internal (device protection) |
| Mains buffering | > 10 ms at 120 V AC |
| Output voltage | 24 V DC ±1 %, adjustable 24 … 28 V DC (constant capacity restricted above 24 V) |
| Output current | 20 A nominal; 30 A dynamic boost for 5 s |
| Efficiency | > 93 % at 230 V AC and nominal values |
| Residual ripple | ≤ 30 mVPP; rise time ≤ 30 ms |
| Output protection | Overvoltage limit ≤ 30 V DC (EN 61131-2) |
| Signaling | DC OK LED and floating contact (threshold UOUT < 0.9 x UN), 30 V AC/DC, 100 mA |
| Insulation input / output | 4 kV AC type test, 1.5 kV AC routine test |
| Ambient temperature | -25 °C … +70 °C; derating above 60 °C (2.5 %/K); start-up type tested at -40 °C |
| MTBF (IEC 61709, SN 29500) | > 1,000,000 h at 40 °C |
| Dimensions / weight | 68 x 130 x 160 mm (W x H x D); 1.5 kg |
| Approvals listed | UL 508 listed, UL 60950-1 recognised; GL applied for (per data sheet) |
How the TRIO-PS-2G/1AC/24DC/20 differs from QUINT4
The TRIO-PS-2G/1AC/24DC/20 offers a dynamic boost of 30 A for five seconds, a simple floating DC OK relay contact and an LED, and a fixed push-in connection on input, output and signal. The data sheet does not list the SFB pulse, the NFC configuration or the analogue and digital preventive outputs found on the QUINT4-PS/1AC/24DC/20. The result is a smaller and cheaper unit, appropriate where the 24 V bus feeds standard control loads and the plant does not require predictive diagnostics. Efficiency above 93 % and a typical MTBF above one million hours at 40 °C are, however, comparable with premium units.
Boost, ripple and overvoltage protection
The 1.5 x IN boost for five seconds is designed for reliable starting of heavy loads such as contactor banks, solenoid groups or capacitive input stages. Residual ripple of 30 mV peak to peak and fast rise time suit PLCs and I/O. The output carries an overvoltage protection circuit limiting surges to 30 V DC in line with EN 61131-2, so electronics connected to the 24 V bus are protected if the regulator fails. The output voltage is adjustable up to 28 V DC for compensating long cables, but above 24 V the available constant power is restricted, which the data sheet notes explicitly.
Related types and system fit
The TRIO-PS-2G/1AC/24DC/20 stands next to the TRIO-PS-2G/1AC/24DC/10 (2903149) for 10 A, the TRIO-PS-2G/3AC/24DC/10 and TRIO-PS-2G/3AC/24DC/20 for three-phase sources, and above it the QUINT4 types when diagnostics matter. Units can be paralleled for redundancy or capacity, as the data sheet states.
Selection checklist
- Total 24 V load with reserve; stay below 20 A in continuous duty.
- Starting current of valves and coils, within the 30 A boost for five seconds.
- Mains quality and lowest voltage, noting the derating below 100 V AC.
- Fit: 68 mm of rail width and 160 mm depth.
- Required diagnostics: a floating DC OK contact only, with no analogue monitoring.
Installation, commissioning and maintenance
Install the TRIO-PS-2G/1AC/24DC/20 on a 35 mm DIN rail with the air-flow space shown in the manual, strip conductors to 10 mm for the push-in input and output (up to 10 mm² solid, 6 mm² flexible on the 20 A type), and wire the DC OK contact to a PLC input. Set the potentiometer under load, check the green LED, and record the output reading. During service, watch for repeated DC OK alarms, dust build-up on the vents and discoloured terminals, which indicate overloading or loose connections.
Typical applications in Oman and the GCC
Machine builders and EPC contractors in the region use this class of supply in package skid panels, utility distribution boards, HVAC and building automation cabinets, and local control stations in water and wastewater plants. The simple, rugged functionality and the wide input range suit sites where supply voltage varies and where maintenance staff prefer a single easily replaced unit.
Information to send with an RFQ
- Full type designation or item number, and quantity
- Mains voltage and frequency at site, and whether the supply is AC, DC or three-phase
- Total load current including inrush and motor starting, plus any redundancy or parallel-operation requirement
- Ambient temperature range, altitude and cabinet ventilation
- Required approvals such as marine, hazardous-area or UL, and any project specification references
- Delivery location and required documents
Documents and quotation
The manufacturer data sheet for the TRIO-PS-2G/1AC/24DC/20 is attached to this page.
Send item number 2903151, quantity and delivery location to Seven Star LLC and request a quotation.
Other Models in the Pc Trio Ps 2g Range
Seven Star LLC supplies models from the Pc Trio Ps 2g range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Phoenix Contact TRIO-PS-2G/1AC/24DC/20 Power Supply 24 V 20 A | Power Modules | You are viewing this model |
| Phoenix Contact TRIO-PS-2G/3AC/24DC/10 3-Phase Power Supply | Power Modules | View details |
Datasheets & Documents
- Datasheet Phoenix Contact TRIO-PS-2G/1AC/24DC/20 Datasheet Download
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About brand
Phoenix Contact is a German, family-owned manufacturer of electrical connection technology and industrial automation, founded in 1923 in Essen by Hugo Knümann. It began as a sales company, and in 1928 Knümann developed the modular terminal block mounted on a rail, the product the company is still best known for. Phoenix Contact is headquartered in Blomberg, North Rhine-Westphalia.
Seven Star LLC lists Phoenix Contact surge protection, power supplies and safety relays, and sources these components by order number for panel builders and maintenance teams in Oman.
Phoenix Contact company profile
| Founded | 1923, Essen, Germany, by Hugo Knümann, as Phönix Elektro- und Industrie-Bedarfsgesellschaft |
|---|---|
| Headquarters | Blomberg, Germany |
| Ownership | Family-owned (Eisert and Stührenberg families) |
| Key invention | The modular terminal block on a DIN rail, 1928 |
| Product families | CLIPLINE terminal blocks, PCB terminals and connectors, QUINT and TRIO power supplies, relay modules, surge protection, signal conditioners, Ethernet switches and PLCnext controllers |
Milestones
- 1923: Hugo Knümann founds the company in Essen.
- 1928: The first modular terminal block is developed.
- Later: Headquarters move to Blomberg, Ostwestfalen-Lippe.
Phoenix Contact parts listed on this page
The TTC-6-2X1-24DC-UT (order number 2906799) is a surge protection device with screw connection for two 24 V DC signal wires that share a common reference potential. The QUINT-PS/1AC/24DC/10 is a single-phase DIN rail power supply delivering 24 V DC at 10 A. The PSR-SCP-24DC/ESP4/2X1/1X2 (order number 2981020) is a single-channel PSR safety relay for emergency stop and safety door monitoring, with two enabling current paths and plug-in screw terminals.
Phoenix Contact products we list
Ordering Phoenix Contact components: what we need
Phoenix Contact items are ordered by a seven-digit order number together with the type designation, both printed on the side of the module. Send both, plus the quantity. If the number is unreadable, send the type text and a photo. For power supplies, state input voltage, output current and whether the unit runs in parallel or with a redundancy module. For buyers in the GCC replacing an older unit, we check the manufacturer's documentation for the listed successor type.
Facts checked against Phoenix Contact's own company history (phoenixcontact.com), October 2026.
Browse Phoenix Contact products by category: Isolator & Barrier, Power Modules, Automation Accessories.
FAQ
Questions about the Phoenix Contact TRIO-PS-2G/1AC/24DC/20 Power Supply
Answers from our engineering team on installation, compatibility and integration.
01What does the TRIO-PS-2G/1AC/24DC/20 output?
It supplies 24 V DC at 20 A nominal, with a dynamic boost of 30 A for 5 seconds, and the output can be adjusted from 24 to 28 V DC.
02How does it signal a fault?
A green LED and a floating signal contact indicate DC OK. The threshold is output voltage below 0.9 times nominal, and the contact is rated 30 V AC/DC, 100 mA.
03What input range does it accept?
The nominal range is 100 to 240 V AC and 110 to 250 V DC, with an overall AC range of 85 to 264 V and derating below 100 V AC.
04What are its dimensions?
The data sheet gives 68 x 130 x 160 mm (width x height x depth) and 1.5 kg.
05Can it be used in redundancy?
Yes. The data sheet allows parallel connection for redundancy and increased capacity, and series connection.
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