Safety Precautions - Omron Q2A Series Technical Manual

4.1 Safety Precautions

4.1

Safety Precautions

Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a
minimum. The internal capacitor stays charged after the drive is de-energized. The charge
indicator LED extinguishes when the DC bus voltage decreases below 50 Vdc. When all
indicators are OFF, remove the covers before measuring for dangerous voltages to make sure
that the drive is safe.
Failure to obey will cause death or serious injury.
Do not operate equipment when covers are missing. Some figures in this section include drives
without covers or safety shields to more clearly show the inside of the drive. Replace covers
and shields before operation. Use drives only as specified by the instructions.
Failure to obey can cause death or serious injury.
Do not remove covers or touch circuit boards while the drive is energized.
Failure to obey can cause death or serious injury.
Prepare an isolated holding brake. The holding brake wiring must activate an external sequence
to de-energize the drive or trigger an emergency switch when the drive detects a fault.
Failure to obey could cause death or serious injury.
In hoist applications, use the applicable safety precautions to prevent the load from falling.
Failure to obey can cause death or serious injury from falling loads.
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DANGER
Electrical Shock Hazard
WARNING
Electrical Shock Hazard
Crush Hazard
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual