Mean-Well LRS-150F-12 wiring for DC input

This MEAN WELL USA Inc. power supply LRS-150F-12 has a universal input of 85 ~ 264 VAC, 120 ~ 370 VDC. They provide the following wiring info in their FAQ section here

Due to different circuit designs, MEAN WELL power supply’s input consists of three types as below:

a. 85~264VAC;120~370VDC
c. 85~132VAC/176~264VAC by Switch; 250~370VDC

In a and b inputs models, power supply can work properly no matter under AC or DC input. Some models need correct connection of input poles, positive pole connects to AC/L; negative pole connects to AC/N. Others may require opposite connection, positive pole to AC/N; negative pole to AC/L. If customers make a wrong connection, the power supply will not be broken. You can just reverse the input poles and power supply will still work.

In c input models, please make sure that you switch the 115/230V input correctly. If the switch is on the 115V side and the real input is 230V, the power supply will be damaged.