Difference between revisions of "Argon user guide/Power supply safe discharging"
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# 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. | # 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. | # 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 voltage | + | # 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. |
{{electricshock|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 is present even after 5 minutes. Contact your supplier first for further assistance before continuing servicing.}} | {{electricshock|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 is present even after 5 minutes. Contact your supplier first for further assistance before continuing servicing.}} | ||
Revision as of 23:39, 13 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:
- 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 is present even after 5 minutes. 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.
