View Full Version : electronics query newbie

12-07-2014, 01:10 PM
A newbie question but,
I want to connect my driver to power supply.
My DM442 driver has ports labelled +VdC and GND for supplying power to it.
My power supply (PS408-12) (http://www.leadshine.com/productdetail.aspx?type=products&category=power-supplies&producttype=linear&series=PS&model=PS408-12) has a VH+ and VH-.
Does +VdC connect to VH+ and does GND connect to VH-.
Its just that the GND port on driver has got me confused as to whether i connect to VH- or to the earth ground on star point.

12-07-2014, 03:30 PM
yes Vdc -> VH+, Gnd -> VH-

NOTHING connects to the star point except mains earth, cable shields, machine frame... its a safety earth... don't confuse 'ground' on power supplies, BOBs etc, which correctly should be labelled 0v to differentiate it from +Volts with 'earth' or 'safety ground'.

The reason the power supply says VH+ and VH- is that it has isolated outputs (from 'safety ground') so depending on application either output could be designated as 0v.