KNX-20E-640

AC/DC DIN Rail Power Supply (PSU), ITE, 1 Output, 19.2 W, 30 VDC, 640 mA

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: MEAN WELL
Product type:
No. of Outputs:1 Output; Output Power Max:19.2W; Output Voltage - Output 1:30V; Output Current - Output 1:640mA; Output Voltage - Output 2:-; Output Current - Output 2:-; Output Voltage -
SVHC: No SVHC (25-Jun-2025)
Product Range: KNX-20E Series
No. of Outputs: 1 Output
Output Power Max: 19.2W
Current, Output 4: -
Input Voltage VAC: 180V AC to 264V AC
Input Voltage AC Max: 264V
Input Voltage AC Min: 180V
Power Supply Output Type: Fixed
Output Current - Output 1: 640mA
Output Current - Output 2: -
Output Current - Output 3: -
Output Voltage - Output 1: 30VDC
Output Voltage - Output 2: -
Output Voltage - Output 3: -
Output Voltage - Output 4: -
Power Supply Applications: ITE
Delivery and price
Units per pack	50
Price	90.13 €
Current stock	10+
Lead time	30 days
Datasheet
**- KNX 20E** 

640mA KNX Power Supply 

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- ‧Isolation classⅠ 

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   - ‧ 

   - ‧ 

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   - ‧  

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-  

- ‧Installed on DIN rail TS-35/7.5 or 15 

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## ** ** 

     

_File Name:KNX-20E-SPEC   2016-08-24_ 

**- KNX 20E** 

640mA KNX Power Supply 

## **SPECIFICATION** 

|**MODEL**<br>**DC OUTPUT VOLTAGE WITHOUT CHOKE**<br>**RATED CURRENT**<br>**RATED POWER**<br>**OUTPUT**<br>**SHORT CIRCUIT CURRENT**<br>**SETUP, RISE TIME**<br>**AC MAINS FAILURE BACK-UP TIME(Typ.)**<br>**VOLTAGE RANGE**<br>**FREQUENCY RANGE**<br>**EFFICIENCY (Typ.)    Note.3**<br>**INPUT**<br>**INRUSH CURRENT (Typ.)**<br>**LEAKAGE CURRENT**<br>**SAFETY STANDARDS**<br>**WORKING TEMP.**<br>**CHOKE**<br>**LED  DISPLAY**<br>**RESET**<br>**WORKING HUMIDITY**<br>**STORAGE TEMP., HUMIDITY**<br>**VIBRATION TYPE OF PROTECTION**<br>**MTBF**<br>**DIMENSION**<br>**MOUNTING**<br>**OTHERS**<br>**NOTE**<br>**PACKING**<br>**OVERLOAD**<br>**OVER VOLTAGE**<br>**AC CURRENT (Typ.)**<br>1000ms, 50ms/230VAC at full load<br>200ms/230VAC at full load<br>180 ~ 264VAC          254 ~ 370VDC<br>47 ~ 63Hz<br>86%<br>0.22A/230VAC<br>COLD START 40A/230VAC<br><1mA / 240VAC<br>33 ~ 35V<br>Protection type : Shut down o/p voltage, re-power on to recover<br>EN61558-1,EN61558-2-16 approved<br>Compliance to EN50491-5-2,-5-3;EN50491-3;EN61000-3-2,-3-3<br>Compliance to EN50491-5-2,-5-3;EN61000-4-2,3,4,5,6,8,11,  heavy industry level, criteria A<br>-30 ~ +70℃(Refer to "Derating Curve")<br>One integrated choke<br>Green LED (ON) :Normal operation<br>Physical button for reset the bus (Press the RESET button for at least 20 seconds to reset the KNX Bus)<br>20 ~ 95% RH non-condensing<br>-40 ~ +85℃, 10 ~ 95% RH<br>10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes<br>109K hrs min.      MIL-HDBK-217F (25℃)<br>52.5*90*54.5mm (W*H*D)<br>35mm mounting rail according to DIN EN60715<br>0.215Kg ; 60pcs/13.9Kg/0.97CUFT<br>**KNX-20E-640**<br>30V(Additional output for ancillary power)<br>640mA<br>19.2W<br>100mVp-p<br>1.4A<br>**ENVIRONMENT**<br>**SAFETY &**<br>**EMC**<br>**(Note 4)**<br>**PROTECTION**<br>**FUNCTION**<br>**RIPPLE & NOISE (max.)Note.2**<br>℃<br><br><br><br><br><br><br>**EMC IMMUNITY**<br>**EMC EMISSION**<br>205 ~ 235% rated output power<br>Protection type : Constant current limiting, recovers automatically after fault condition is removed<br>**WITHSTAND VOLTAGE**<br>I/P-O/P:3.75KVAC     I/P-FG:2KVAC     O/P-FG:1.25KVAC<br>**ISOLATION RESISTANCE**<br>I/P-O/P, I/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH<br>**TYPE OF PROTECTION**<br>IP20 design<br>max<br>**BUS OUTPUT VOLTAGE WITH CHOKE**<br>Bus,30V (KNX black/red terminal block)<br>Red LED1 (Reset):Reset the bus; Red LED2 (> ):Overload/Short<br>ⅠⅠ|**MODEL**<br>**DC OUTPUT VOLTAGE WITHOUT CHOKE**<br>**RATED CURRENT**<br>**RATED POWER**<br>**OUTPUT**<br>**SHORT CIRCUIT CURRENT**<br>**SETUP, RISE TIME**<br>**AC MAINS FAILURE BACK-UP TIME(Typ.)**<br>**VOLTAGE RANGE**<br>**FREQUENCY RANGE**<br>**EFFICIENCY (Typ.)    Note.3**<br>**INPUT**<br>**INRUSH CURRENT (Typ.)**<br>**LEAKAGE CURRENT**<br>**SAFETY STANDARDS**<br>**WORKING TEMP.**<br>**CHOKE**<br>**LED  DISPLAY**<br>**RESET**<br>**WORKING HUMIDITY**<br>**STORAGE TEMP., HUMIDITY**<br>**VIBRATION TYPE OF PROTECTION**<br>**MTBF**<br>**DIMENSION**<br>**MOUNTING**<br>**OTHERS**<br>**PACKING**<br>**OVERLOAD**<br>**OVER VOLTAGE**<br>**AC CURRENT (Typ.)**<br>**ENVIRONMENT**<br>**SAFETY &**<br>**EMC**<br>**(Note 4)**<br>**PROTECTION**<br>**FUNCTION**<br>**RIPPLE & NOISE (max.)Note.2**<br>**EMC IMMUNITY**<br>**EMC EMISSION**<br>**WITHSTAND VOLTAGE**<br>**ISOLATION RESISTANCE**<br>**TYPE OF PROTECTION**<br>**BUS OUTPUT VOLTAGE WITH CHOKE**|**MODEL**<br>**DC OUTPUT VOLTAGE WITHOUT CHOKE**<br>**RATED CURRENT**<br>**RATED POWER**<br>**OUTPUT**<br>**SHORT CIRCUIT CURRENT**<br>**SETUP, RISE TIME**<br>**AC MAINS FAILURE BACK-UP TIME(Typ.)**<br>**VOLTAGE RANGE**<br>**FREQUENCY RANGE**<br>**EFFICIENCY (Typ.)    Note.3**<br>**INPUT**<br>**INRUSH CURRENT (Typ.)**<br>**LEAKAGE CURRENT**<br>**SAFETY STANDARDS**<br>**WORKING TEMP.**<br>**CHOKE**<br>**LED  DISPLAY**<br>**RESET**<br>**WORKING HUMIDITY**<br>**STORAGE TEMP., HUMIDITY**<br>**VIBRATION TYPE OF PROTECTION**<br>**MTBF**<br>**DIMENSION**<br>**MOUNTING**<br>**OTHERS**<br>**PACKING**<br>**OVERLOAD**<br>**OVER VOLTAGE**<br>**AC CURRENT (Typ.)**<br>**ENVIRONMENT**<br>**SAFETY &**<br>**EMC**<br>**(Note 4)**<br>**PROTECTION**<br>**FUNCTION**<br>**RIPPLE & NOISE (max.)Note.2**<br>**EMC IMMUNITY**<br>**EMC EMISSION**<br>**WITHSTAND VOLTAGE**<br>**ISOLATION RESISTANCE**<br>**TYPE OF PROTECTION**<br>**BUS OUTPUT VOLTAGE WITH CHOKE**|**KNX-20E-640**<br>Bus,30V (KNX black/red terminal block)|
|---|---|---|---|
|||**DC OUTPUT VOLTAGE WITHOUT CHOKE**|30V(Additional output for ancillary power)|
|||**RATED CURRENT**|640mA|
|||**RATED POWER**|19.2W|
|||**RIPPLE & NOISE (max.)Note.2**|100mVp-p|
|||**SHORT CIRCUIT CURRENT**|1.4A|
|||**SETUP, RISE TIME**|1000ms, 50ms/230VAC at full load|
|||**AC MAINS FAILURE BACK-UP TIME(Typ.)**|200ms/230VAC at full load|
|||**VOLTAGE RANGE**|180 ~ 264VAC          254 ~ 370VDC|
|||**FREQUENCY RANGE**|47 ~ 63Hz|
|||**EFFICIENCY (Typ.)    Note.3**|86%|
|||**AC CURRENT (Typ.)**|0.22A/230VAC|
|||**INRUSH CURRENT (Typ.)**|COLD START 40A/230VAC|
|||**LEAKAGE CURRENT**|<1mA / 240VAC|
|||**OVERLOAD**|205 ~ 235% rated output power<br>Protection type : Constant current limiting, recovers automatically after fault condition is removed|
|||**OVER VOLTAGE**|33 ~ 35V<br>Protection type : Shut down o/p voltage, re-power on to recover|
|||**RESET**|Physical button for reset the bus (Press the RESET button for at least 20 seconds to reset the KNX Bus)|
||||Green LED (ON) :Normal operation|
|||**LED  DISPLAY**|max<br>Red LED1 (Reset):Reset the bus; Red LED2 (> ):Overload/Short<br>ⅠⅠ|
|||**CHOKE**|One integrated choke|
|||**WORKING TEMP.**|-30 ~ +70℃(Refer to "Derating Curve")|
|||**WORKING HUMIDITY**|20 ~ 95% RH non-condensing|
|||**STORAGE TEMP., HUMIDITY**|-40 ~ +85℃, 10 ~ 95% RH|
|||**VIBRATION TYPE OF PROTECTION**|10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes|
|||**TYPE OF PROTECTION**|IP20 design|
|||**SAFETY STANDARDS**|EN61558-1,EN61558-2-16 approved|
|||**WITHSTAND VOLTAGE**|I/P-O/P:3.75KVAC     I/P-FG:2KVAC     O/P-FG:1.25KVAC|
|||**ISOLATION RESISTANCE**|I/P-O/P, I/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH|
|||**EMC EMISSION**|Compliance to EN50491-5-2,-5-3;EN50491-3;EN61000-3-2,-3-3|
|||**EMC IMMUNITY**|Compliance to EN50491-5-2,-5-3;EN61000-4-2,3,4,5,6,8,11,  heavy industry level, criteria A|
|||**MTBF**|109K hrs min.      MIL-HDBK-217F (25℃)|
|||**DIMENSION**|52.5*90*54.5mm (W*H*D)|
|||**MOUNTING**|35mm mounting rail according to DIN EN60715|
|||**PACKING**|0.215Kg ; 60pcs/13.9Kg/0.97CUFT|
|||℃<br><br><br><br><br><br>||



℃ 

  

 

 

**NOTE**   

_File Name:KNX-20E-SPEC   2016-08-24_ 

**- KNX 20E** 

640mA KNX Power Supply 

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Block Diagram<br>fosc :65KHz<br>EMI RECTIFIERS POWER RECTIFIERS CHOKE BUS+V<br>I/P FILTER & SWITCHING & & -V<br>FILTER FILTER MODULE BUS<br>O.C.P.<br>without choke<br>FG DETECTION +V<br>CIRCUIT<br>O.L.P. CONTROL -V<br>—— 4 | ——s without choke 0<br>O.V.P.<br>e l<br>Derating Curve |_| Static Characteristics<br>100<br>100<br>90<br>80<br>80<br>60 70<br>60<br>40<br>50<br>20<br>40<br>-30 0 10 20 30 40 50 60 70 (VERTICAL) 180 200 220 240 264<br>AMBIENT TEMPERATURE ( ℃ ) INPUT VOLTAGE (V) 60Hz<br>Mechanical Specification<br>Case No. KNX-20             Unit:mm<br>3SU<br>1 standard unit (SU)=18mm<br>2 3 58.5<br>52.5<br>54.5<br>5 7.25 7.5<br>EIB/KNX<br>+V -V Reset<br>1<br>+V -V<br>BUS 30VDC<br>a 4<br>5<br>6<br>S<br>| Qe<br>| t—itséisdCY-|<br>L N<br>7.5 7.5 24.06<br>a | ~<br>1 KNX bus termnials (Red :+, Black:-)<br>2 Ancillary power termnials<br>3 Reset button<br>oo|<br>4 Power ON (Green)<br>ADMISSIBLE DIN-RAIL:TS35/7.5 OR TS35/15<br>5 Reset (Red)<br>——— 6 ⅠⅠ> max (Red) CT<br>LOAD (%) LOAD (%)<br>7.45<br>90 63.7 45.2<br>7.45<br>35<br>**----- End of picture text -----**<br>


_File Name:KNX-20E-SPEC   2016-08-24_ 

**- KNX 20E** 

640mA KNX Power Supply 

## **Configuration and Commissioning** 

The device does not need any configuration or application program. 

## **Typical application** 

- **Application 1:Powering KNX Bus Only** 

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KNX Bus<br>+V -V Reset<br>BUS+V 30VDC-V BUS+V 30VDC-V BUS+V 30VDC-V BUS+V 30VDC-V<br>HV AC Blinds &<br>KNX-20E Lighting device System Shutters<br>device device<br>L N L N L N L N<br>L<br>N<br>PE<br>**----- End of picture text -----**<br>


Bus wiring consideration: 

1. the maximum number of bus devices connected is 64. 

2. the maximum length of a line segment is 350 m, measured along the line between the power supply and the furthest device bus. 

3. the maximum distance between two bus devices cannot exceed 700 m 

4. the maximum length of a bus line is 1000 m, keeping into account all segments 

## ◎ **Application 2:Powering KNX Bus and KNX device** 

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KNX Bus<br>Ⅰ 1 Ⅰ 2<br>+V -V Reset +V -V<br>BUS+V 30VDC-V BUS+V 30VDC-V BUS+V 30VDC-V BUS+V 30VDC-V<br>HV AC Blinds &<br>KNX-20E Lighting device System Shutters<br>device device<br>L N L N L N L N<br>L<br>N<br>PE<br>Note:<br>1. Use only ancillary output of KNX-20E to power the KNX device<br>2. The total current     +    should be equal or less than 640mA. Ⅰ 1  Ⅰ 2 Ⅰ 1  +Ⅰ  ≤ 2 640mA<br>**----- End of picture text -----**<br>


3. The above Bus wiring consideration is still applicable 

## **Recommended Screwdriver, Wire and Torque Setting** 

- 1.Screwdriver(Width*Thick):Slotted screwdriver 2.5*0.4~3.5*0.6 2.Wire:0.5~4.0mm   solid core  or  0.5~2.5mm   finely stranded **2** 2 

- 3.Torque:0.8Nm 

## **Installation Manual** 

Please refer to : http://www.meanwell.com/webnet/search/InstallationSearch.html 

_File Name:KNX-20E-SPEC   2016-08-24_
Updated at June 4, 2026
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