Kollmorgen Digital MMC Control, Руководство по оборудованию

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Kollmorgen - December 2011 17
MMC Smart Drive Hardware Manual
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SAFETY PRECAUTIONS
•
Make sure the circuit is safe by using the proper test equipment. Check test equip-
ment regularly.
• There may be circumstances where troubleshooting on live equipment is required.
Under such conditions, special precautions must be taken:
• Make sure your tools and body are clear of the areas of equipment which may
be live.
• Extra safety measures should be taken in damp areas.
• Be alert and avoid any outside distractions.
• Make certain another qualified person is in attendance.
• Before applying power to any equipment, make certain that all personnel are clear
of associated equipment.
• Control panel doors should be unlocked only when checking out electrical equip-
ment or wiring. On completion, close and lock panel doors.
• All covers on junction panels should be fastened closed before leaving any job.
• Never operate any controls while others are performing maintenance on the sys-
tem.
• Do not bypass a safety device.
• Always use the proper tool for the job.
• Replace the main supply fuses only when electrical power is OFF (locked out).
2.9 Safe Cleaning Practices
•
Do not use toxic or flammable solvents to clean control system hardware.
•
Turn off electrical power (lock out) before cleaning control system assemblies.
•
Keep electrical panel covers closed and power off when cleaning an enclosure.
ATTENTION
Care should be taken if you are manually discharging
the bus capacitors.
WARNING
Even after power to the drive is removed, it may take up
to 10 minutes for bus capacitors to discharge to a level
below 50 VDC. To be sure the capacitors are dis-
charged, measure the voltage across the + and - termi-
nals for the DC bus.