ENMG / DIN-RAIL POWER SUPPLIES
SDR power supplies
Active-PFC DIN-rail power supplies
Industrial AC/DC power supplies with active power-factor correction, adjustable DC outputs and a DC OK status contact. Available in120,240,480 and960 class enclosures.
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Specifications & selection.
- 12 /24 /48 /55 V selections by power class.
- DC OK contact and short-duration overload capability.
- Natural convection, Class I construction.
| Model | Power W | Output V / A | Adjustment V | Typical efficiency230VAC | Capacitive load µF |
|---|---|---|---|---|---|
| SDR-120-12 | 120 | 12 /10 | 11.8–14 | 93.5% | 80000 |
| SDR-120-24 | 120 | 24 /5 | 23.5–28 | 94% | 50000 |
| SDR-120-48 | 120 | 48 /2.5 | 47–53 | Not stated | 30000 |
| SDR-120-55 | 121 | 55 /2.2 | 52–56 | Not stated | Not stated |
| SDR-240-12 | 192 | 12 /16 | 12–14 | 93% | 160000 |
| SDR-240-24 | 240 | 24 /10 | 24–28 | 94% | 40000 |
| SDR-240-48 | 240 | 48 /5 | 48–53 | Not stated | 10000 |
| SDR-240-55 | 242 | 55 /4.4 | 52–56 | Not stated | 10000 |
| SDR-480-24 | 480 | 24 /20 | 24–28 | 94.5% | 20000 |
| SDR-480-48 | 480 | 48 /10 | 48–55 | Not stated | 10000 |
| SDR-960-24 | 960 | 24 /40 | 24–28 | 95% | 10000 |
| SDR-960-48 | 960 | 48 /20 | 48–55 | 95% | 5000 |
| Parameter | 120 /240 /480 | 960 |
|---|---|---|
| AC input range in prose | 85–264 VAC | 180–264 VAC |
| Nominal input marking | 100–240 VAC | 200–240 VAC |
| DC input range | 120–370 VDC | 254–370 VDC |
| Frequency | 47–63 Hz | 47–63 Hz |
| Peak power in prose | 150%, duration/duty require model data | 130%, duration/duty require model data |
| Ambient | −40 to +70 °C, derating required | −40 to +85 °C, derating required |
| Input/output withstand | 3000 VAC | 4000 VAC |
| Class | Prose body dimensions | Original dimensioned photo | Prose mass |
|---|---|---|---|
| 120 | 32 ×124 ×110 | 32 ×129 ×120 | 490 g |
| 240 | 41 ×124 ×110 | 41 ×129 ×120 | 650 g |
| 480 | 48 ×131.5 ×125 | 48 ×129 ×141 | 980 g |
| 960 | 110 ×124 ×127 | 110 ×124 ×135 | 1680 g |
| Parameter | Source information |
|---|---|
| DC OK | Contact opens below90% of output;30 VDC rating with1 A or7 A versions not mapped to models |
| Accuracy | Generally±1%; some12 V variants±2% |
| Line / load regulation | ±0.5% /±1% |
| Altitude | Up to5000 m in prose; above2000 m reduce permitted ambient5 °C per1000 m |
| Protections | Short-circuit, overload, overvoltage and temperature; behavior must be confirmed by model |
| Parallel option | SDR-960 lists3+1 current sharing; obtain approved wiring and redundancy configuration |
Selection & installation notes
- Output current and power limits apply together, including when voltage is adjusted. Check low-input-voltage and temperature derating curves for the selected model.
- Connect protective earth and maintain vertical convection airflow. The source suggests20 mm above/below and5 mm at the sides; allow more beside hot equipment. Confirm terminal torque and wire size for the actual unit.
- Do not infer certified end-equipment compliance from referenced standards or logos. Request the exact model’s certification and verify EMC in the completed installation.
- A conformal-coating option does not make an open ventilated power supply waterproof.
- The photos and prose show different outlines; do not assume the smaller prose dimensions provide sufficient space. Confirm the delivered revision and full envelope.
- DC OK contact current is unresolved between1 A and7 A; do not apply7 A to an unidentified signal contact.
- The source title says stainless steel, but the material table lists aluminum and coated/carbon-steel parts. No all-stainless construction is claimed.
- Peak power is time-limited, not continuous output. Current sharing alone does not establish fault-isolated redundancy; verify required ORing and protection.
Based on the official Chinese product page and selection charts ↗. Checked 2026-09-15. Confirm the current specification for the exact model when ordering.
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ENMG power supplies — English product-family brochure.
This is a product-family brochure. Request a model-specific datasheet and installation drawing with your inquiry.