Difference between revisions of "Argon user guide/Power supply safe discharging"

Revision as of 11:28, 14 June 2013

Power supplies and drives have capacitors that store electricity even when power supply has been disconnected from the power network. This poses electric shock hazard when touching a device that has been just unplugged from the power line.

Safely discharging Argon drive

Argon (servo drive) has internal power supply bleeding resistor that will discharge the capacitors during 5 minutes after AC power has been removed.

To safely discharge Argon voltages:

1. Remove AC power (both L and N lines). This can be done for example by unplugging the power cord from wall socket where the power comes from.
2. Wait 3 to 5 minutes after removing AC to allow capacitor voltage discharge.
3. Measure a DC voltage between VN and VP terminals of J4 connector with a multimeter rated up to 600 VDC. Voltage has discharged if VN-VP voltage is less than 20 VDC.

If DC voltage between VN and VP terminals of J4 connector is above 20 VDC after 3 minutes of de-energization, drive has internal failure of discharging circuity. In such case danger may be present even after weeks of wait. Contact your supplier first for further assistance before continuing servicing.

Discharging 24 VDC supply does happen instantly after 24 V has been removed. However, this does not affect AC side discharge in any way.