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MEAN WELL KNX-40E-1280 KNX Power Supply, 30 V, 1280 mA, 38.4 W
MEAN WELL KNX-40E-1280 KNX Power Supply, 30 V, 1280 mA, 38.4 W
MEAN WELL KNX-40E-1280 KNX Power Supply, 30 V, 1280 mA, 38.4 W

At a glance

Output Voltage
30 V KNX bus with choke
Rated Output Current
1280 mA
Rated Output Power
38.4 W
Input Voltage Range
180 V to 264 V AC
Mounting
DIN Rail
Diagnostics
basic function
MEAN WELL logoModel KNX-40E-1280Current model

MEAN WELL KNX-40E-1280 KNX Power Supply, 30 V, 1280 mA, 38.4 W

Price on request

At a glance

Output Voltage
30 V KNX bus with choke
Rated Output Current
1280 mA
Rated Output Power
38.4 W
Input Voltage Range
180 V to 264 V AC
Mounting
DIN Rail
Diagnostics
basic function

Powers the KNX bus so switches, sensors and actuators can talk, for home and building automation, lighting, HVAC, blinds and alarm monitoring. KNX power supply, 30 V, 1280 mA, 38.4 W. EIB / KNX power supply with integrated choke.

Part of the MEAN WELL KNX-40E series. Compare both models

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Ask for helpCompatibility, sizing and what else you need.
  • WarrantyManufacturer warranty under MEAN WELL's terms: 3 years. Warranty claims
  • DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery

Overview

What it is

The MEAN WELL KNX-40E-1280 is a KNX power supply from the KNX-40E series (1280 mA KNX Power Supply), rated 30 V, 1280 mA, 38.4 W.

What it is used for

Supplies the 30 V KNX bus through its integrated choke so KNX switches, sensors and actuators in a building automation or security installation can communicate, with a second 30 V output for auxiliary devices. MEAN WELL lists applications such as intelligent home control and building automation, lighting, hvac, blinds and shutters, security and alarm monitoring systems, energy management.

Key features

  • EIB / KNX power supply with integrated choke.
  • Compact 4SU (72 mm) width, suitable for TP1-256.
  • Safety extra low voltage (SELV), 180 V to 264 V AC input.
  • Protections: short circuit, overload (short circuit proof), over voltage.
  • LED indicators for normal operation, bus reset and bus overload.
  • Over voltage category III.

Key Specifications

  • Output Voltage: 30 V KNX bus with choke (black/red terminal); 30 V auxiliary DC output without choke.
  • Rated Output Current: 1280 mA.
  • Rated Output Power: 38.4 W.
  • Input Voltage Range: 180 V to 264 V AC; 176 V to 280 V DC.
  • Mounting: DIN Rail.
  • Diagnostics: Blank type: basic function; bus reset by holding RESET for at least 20 s.

Buying considerations

Size the unit with headroom above the connected load and check the derating information in the datasheet for high ambient temperature or low input voltage. Other models in the same series are listed on this page.

Installation considerations

MEAN WELL treats this unit as a component of the final equipment, so approvals and EMC performance should be confirmed for the complete installation. Wiring and safety details are in the official datasheet linked below.

Features

MEAN WELL KNX-40E-1280 KNX Power Supply, 30 V, 1280 mA, 38.4 W, dimension drawing
Check the datasheet for tolerances.

Size and fit

Dimensions
72 x 90 x 57 mm (W x H x D)
Weight
0.328 kg
Mounting
DIN Rail

Technical specifications

Key facts

What is it?
KNX power supplyBrand MEAN WELL, model KNX-40E-1280
What does it output?
30 V KNX bus with choke, 1280 mA, 38.4 W
What input does it accept?
180 V to 264 V AC
How does it mount?
DIN Rail
Can it be used outdoors?
IP20
Which documents are available?
Datasheet Open documents

RelatedSeriesMEAN WELL KNX-40E series, 2 modelsDocumentsAll MEAN WELL documents

Output

Output Voltage
30 V KNX bus with choke (black/red terminal); 30 V auxiliary DC output without choke
Rated Output Current
1280 mA
Rated Output Power
38.4 W
Ripple and Noise (max.)
100 mVp-p (before choke)
Efficiency (typ.)
86% (before choke)

Input

Input Voltage Range
180 V to 264 V AC; 176 V to 280 V DC
Input Frequency Range
47 Hz to 63 Hz

Protection

Short Circuit Current
2.8 A
Withstand Voltage
I/P to O/P: 4.2 kV AC; I/P to FG: 2 kV AC

Environment

Operating Temperature
-30 °C to +70 °C (see derating curve)
Operating Humidity
20% to 95% RH non-condensing
Cooling
Free air convection
IP Rating
IP20

Physical

Dimensions
72 x 90 x 57 mm (W x H x D)
Weight
0.328 kg
Mounting
DIN Rail

Approvals

MTBF
1414.2K hrs min. Telcordia SR-332 (Bellcore); 217.1K hrs min. MIL-HDBK-217F (25 °C)

Other

Mains Failure Back-up Time (typ.)
200 ms at 230 V AC, full load
Diagnostics
Blank type: basic function; bus reset by holding RESET for at least 20 s
Series
KNX-40E
Warranty
Manufacturer warranty under MEAN WELL's terms: 3 years. How claims work
Product attributes and shipping details
Brand

MEAN WELL
Power Output

38.4 W

Downloads

Documentation

  • KNX-40E series datasheetPublicDatasheet · Family · meanwell.com
    Download

Series documents can differ from your exact model. Report a wrong or missing file

Questions about this product

What input voltage does the KNX-40E-1280 accept?

MEAN WELL lists 180 V to 264 V AC; 176 V to 280 V DC for this model.

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