MEAN WELL logo Home

What is the difference between -V and COM which are marked on the output side?

COM (COMMON) means common ground. Please see below: Single output: Positive pole (+V), Negative pole (-V) Multiple output (Common ground): Positive pole (+V1, +V2,.), Negative pole (COM)

Recent Articles

Safety Standard

What is RoHs?

24/09/20
Technical Question

What is the input voltage of the ELG series?

21/09/20
Technical Question

Would it be possible to reduce the noise of a fan?

21/09/20
Technical Question

How to select the correct circuit breaker or fuse for MEAN WELL SPS?

21/09/20
Technical Question

During the operation of your power supply, there is some leakage current on the case. Is this normal? Will this leakage current hurt the human body?

21/09/20
Technical Question

The output ground (GND) and frame ground (FG) is the same point in my system, can MEAN WELL's power supplies be used in such system?

21/09/20

Sales & Support