1. Entwodiksyon
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the MEAN WELL DR-120-12 AC-DC DIN Rail Power Supply. Please read this manual thoroughly before using the product and retain it for future reference.
2. Enstriksyon Sekirite
AVÈTISMAN: Risk pou chòk elektrik. Se sèlman pèsonèl kalifye ki dwe fè enstalasyon ak antretyen.
- Ensure the power supply is disconnected from the main voltage before any installation or maintenance work.
- Protect against accidental contact with live parts.
- Ensure proper grounding (earth connection) is established.
- Do not operate the unit in environments with high humidity or extreme temperatures outside the specified range.
- Pa ouvri c laasing; pa gen okenn pyès itilizatè a ka repare anndan an.
- Obsève tout kòd ak règleman elektrik lokal ak nasyonal yo.
3. Pwodwi souview
The MEAN WELL DR-120-12 is a 120W single output industrial DIN rail power supply, providing a stable 12V DC output at up to 10A. It features universal AC input and is designed for installation on standard DIN rails, making it suitable for various industrial control applications.

Figi 3.1: Devan view of the MEAN WELL DR-120-12 AC-DC DIN Rail Power Supply, showing input/output terminals and specifications label.

Figure 3.2: Close-up of the top terminals (+V, -V, DC OK) and ventilation grille on the MEAN WELL DR-120-12, indicating output connections and cooling features.
4. Espesifikasyon
| Paramèt | Valè |
|---|---|
| Modèl | DR-120-12 |
| Sòti Voltage | 12V DC |
| Sòti aktyèl | 10A |
| Sortie pouvwa | 120W |
| Antre Voltage Range | 88-132VAC / 176-264VAC (selectable by switch) |
| Gamme frekans | 47-63Hz |
| Efikasite | Tipikman 85% |
| Kalite aliye | DIN Rail (TS-35/7.5 or TS-35/15) |
| Tanperati Fonksyònman | -20°C to +70°C (refer to derating curve) |
| Dimansyon (L x W x H) | 125 x 100 x 70 mm (approximate, refer to dimension drawing) |
| Sètifikasyon | CE, UL Listed |

Figure 4.1: Technical drawing illustrating the dimensions of the DR-120-12 power supply in millimeters.
5. Enstalasyon ak Enstalasyon
5.1 DIN Rail Mounting
The DR-120-12 is designed for easy installation on standard TS-35/7.5 or TS-35/15 DIN rails. Ensure the unit is mounted vertically to allow for proper heat dissipation through convection cooling.
- Kwoke bò anwo ekipman pou pouvwa a sou ray DIN lan.
- Pouse kwen anba a byen fèm jiskaske li fè yon klik an plas.
- Verify that the unit is securely fastened to the DIN rail.

Figi 5.1: Egzample of the DR-120-12 power supply securely mounted on a DIN rail, demonstrating the proper installation method.
5.2 Koneksyon fil elektrik
Before making any connections, ensure the AC input voltage selector switch (115VAC/230VAC) on the front panel is set correctly according to your local mains voltage. Incorrect setting can damage the unit.
- Input Terminals (Bottom): Connect the AC mains supply to the L (Line), N (Neutral), and ⌂ (Ground) terminals. Use appropriate wire gauges for the current rating.
- Output Terminals (Top): Connect your load to the +V and -V terminals. Observe polarity. The "DC OK" LED will illuminate when the output voltage is within tolerance.
- Voltage Ajisteman: A potentiometer (ADJ) is located on the front panel for fine-tuning the output voltage within a small range.

Figi 5.2: Plis paseview of the DR-120 series, highlighting the input (bottom) and output (top) terminal blocks for wiring connections.
6. Operasyon
Once properly installed and wired, apply AC power to the input terminals. The "DC OK" LED indicator on the front panel will light up, indicating that the output voltage is present and within its specified range. The unit is now operational and supplying power to the connected load.
- Pwoteksyon Surcharge: The unit features overload protection. If an overload occurs, the output voltage may drop or shut down. Reduce the load to restore normal operation.
- Overvoltage Pwoteksyon: Si pwodiksyon an voltage exceeds a preset limit, the unit will shut down to protect the connected equipment. Power cycling may be required to reset.
7. Antretyen
The DR-120-12 power supply is designed for reliable operation and requires minimal maintenance. Regular inspection is recommended to ensure optimal performance and safety.
- Netwayaj: Keep the ventilation openings clear of dust and debris to ensure proper airflow. Use a soft, dry brush or compressed air for cleaning. Do not use liquid cleaners.
- Enspeksyon: Periodically check all wiring connections for tightness and signs of wear or damage. Ensure the unit is securely mounted.
- Kondisyon anviwònman: Asire w ke anviwònman operasyon an rete nan limit tanperati ak imidite espesifye yo.
NAN. Depanaj
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Pa gen pwodiksyon voltagLED "DC OK" la etenn / | Pa gen kouran AC Pa kòrèk D' voltage switch setting Surcharge oswa kous kout sou pwodiksyon an Fòt entèn | Check AC mains supply and connections. Verify 115VAC/230VAC switch setting. Disconnect load, check for short circuits, reduce load. Kontakte sipò si pwoblèm nan pèsiste. |
| Sòti voltage twò ba | Kondisyon Surcharge Voltage adjustment (ADJ) set too low | Diminye chaj. Adjust ADJ potentiometer clockwise to increase voltage. |
| Unit is hot to touch | Ensifizan vantilasyon Kondisyon Surcharge Segondè tanperati anbyen | Ensure proper clearance around the unit and clear ventilation openings. Diminye chaj. Ensure ambient temperature is within specifications. |
If troubleshooting steps do not resolve the issue, contact qualified service personnel or the manufacturer for assistance.
9. Garanti ak sipò
MEAN WELL products are typically covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official MEAN WELL website. For technical support or service inquiries, please contact your distributor or the manufacturer directly, providing the model number (DR-120-12) and serial number of your unit.
10. Enfòmasyon sou jete
This product contains electronic components and should not be disposed of with general household waste. Please dispose of this product in accordance with local regulations for electronic waste recycling. Proper disposal helps prevent potential negative consequences for the environment and human health.