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Mean Well KNX-40E-1280D KNX Power Supply 1280mA - Diagnostic
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Mean Well KNX-40E-1280D KNX Power Supply 1280mA - Diagnostic
The KNX-40E is a Mean Well DIN rail power converter with a 72mm profile (input range: 180~264VAC, operating temperature: -40~+85°C).
Key Features
- ✓ 72mm width — DIN rail TS-35 compatible
- ✓ Input voltage range: 180~264VAC
- ✓ Cooling by free air convection
- ✓ Wide operating temperature: -40~+85°C
- ✓ Protections: Short circuit / Overload / Over voltage
- ✓ Safety approvals: EN61558-1,EN61558-2-16 ; EN50491-3
- ✓ 3 years warranty
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BrandMean Well
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SeriesKNX Series
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Power Rating38.4 Watt
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Output Voltage30 Volt
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Rated Current1.28 Ampere
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Input Voltage180V~264V
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No of Output1
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Standards MetCE,DEKRA,KNX
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Operating Temperature-30°C~70°C
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Warranty3 Year
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Length3.54 in
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Width2.83 in
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Height2.24 in
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Weight0.72 lb
::specification::
Frequently Asked Questions
Can the KNX-40E-1280D be used for a higher-capacity KNX control cabinet in building management?
Yes. This model is rated at 30V, 38.4W, and 1280mA, so it fits KNX building management cabinets that need more output capacity than a 19.2W, 640mA supply. It is also designed as a DIN rail power supply for panel use.
Is the KNX-40E-1280D suitable for centralized KNX automation panels in commercial control enclosures?
It is well suited to centralized KNX control enclosures that use a 30V KNX supply and need the higher 38.4W, 1280mA rating. The integrated choke keeps it aligned with EIB/KNX system use. Its 90.0 × 72.0 × 57.0 mm size also fits standard DIN rail cabinet layouts.
Can I use the KNX-40E-1280D in a PLC cabinet that also includes KNX-based building control functions?
Yes, when the KNX portion of the cabinet needs a dedicated 30V KNX power supply within a 38.4W and 1280mA rating. The DIN rail format makes it practical for mixed-control cabinets where panel organization matters. It should still be selected as a KNX power component, not as a general-purpose cabinet supply.
Should the KNX-40E-1280D be installed only inside an enclosure or cabinet?
It is best used inside a control cabinet or enclosure. The operating temperature range is -30°C to +70°C, but no IP rating is listed in the specs. That makes protected indoor cabinet use the appropriate environment.
How does the KNX-40E-1280D compare with the other models in the KNX series?
The KNX-40E-1280D is a 38.4W, 30V, 1280mA model. In the same sibling set, the KNX-40E-1280 has the same 38.4W, 30V, 1280mA rating, while the KNX-20E-640 and KNX-20U-640 are both 19.2W, 30V, 640mA models. The family therefore separates into lower-capacity 20-series units and higher-capacity 40-series units.
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Other KNX-40E Models
1 other model| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well KNX-40E-1280 KNX Power Supply 1280mA | 38.4W | 30V | 1.28A | Indoor | $128.67 | View |
