KNX-20U-640 — KNX bus power supply
MEAN WELL KNX-20U-640 is the 640 mA KNX power-supply ordering option identified for 115 VAC input and available by request. Confirm the exact U-version specification and supplied configuration before system selection.
Download MEAN WELL KNX-20 Datasheet (PDF)The combined catalog identifies the U option in the model encoding on page 1. Pages 2–4 provide detailed specifications for KNX-20E-640, the 230 VAC E version.
Model selection
| Parameter |
Details |
| Manufacturer ordering option |
KNX-20U-640. The U code denotes 115 VAC input; E denotes the standard 230 VAC version. |
| Rated output current |
640 mA, as identified by the current code and the series model encoding. |
| Input selection |
115 VAC nominal input option. The catalog does not give a separate U-version operating input range; do not apply the E version’s 180–264 VAC range to this model. |
| Detailed specification |
Obtain the U-version output voltage and power, permitted AC/DC input range, protection ratings, temperature limits, dimensions and installation instructions for the supplied unit. The E-only detailed specification table does not establish these U-version values. |
| Unit mass |
No separately identified U-version unit mass is provided in the current catalog. |
