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

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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.
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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 recently 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.
  
 
To safely discharge Argon voltages:  
 
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.
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# Remove power from J4 connector (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.
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# Wait at least 3 minutes after de-energization 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.
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# Measure a DC voltage between VN and VP terminals of J4 connector with a multimeter rated at least up to 600 VDC as the worst case drive internal HV voltage may be over 400 VDC. '''Voltage has been successfully discharged if VN-VP voltage is less than 5 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 may be present even after weeks of wait. 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 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.
 
Discharging 24 VDC supply does happen instantly after 24 V has been removed. However, this does not affect AC side discharge in any way.
[[Category:Setup guides]]
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[[Category:Argon]]
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[[Category:Argon_user_guide]]

Latest revision as of 13:17, 7 April 2016

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 recently unplugged from the power line.

Safely discharging Argon drive[edit | edit source]

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 power from J4 connector (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 at least 3 minutes after de-energization to allow capacitor voltage discharge.
  3. Measure a DC voltage between VN and VP terminals of J4 connector with a multimeter rated at least up to 600 VDC as the worst case drive internal HV voltage may be over 400 VDC. Voltage has been successfully discharged if VN-VP voltage is less than 5 VDC.

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