Difference between revisions of "Argon user guide/Power supply safe discharging"
From Granite Devices Knowledge Wiki
| [checked revision] | [checked revision] |
| Line 1: | Line 1: | ||
| − | 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. | + | 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, or its wiring, that has been just unplugged from the power line. |
==Safely discharging Argon drive== | ==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. | [[Argon (servo drive)]] has internal power supply bleeding resistor that will discharge the capacitors during 5 minutes after AC power has been removed. | ||
Revision as of 11:29, 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, or its wiring, 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:
- 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.
- Wait 3 to 5 minutes after removing AC to allow capacitor voltage discharge.
- 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.
