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External wiring can supply dangerous voltages to the terminals of relay outputs (RO1, RO2
•
and RO3).
The Safe torque off function does not remove the voltage from the main and auxiliary
•
circuits. The function is not effective against deliberate sabotage or misuse.
Printed circuit boards
WARNING! Use a grounding wrist band when you handle printed circuit boards.
Do not touch the boards unnecessarily. The boards contain components sensitive to
electrostatic discharge.
Grounding
These instructions are for all personnel who are responsible for the electrical installation,
including the grounding of the drive.
WARNING! Obey these instructions. If you ignore them, injury or death, or equipment
malfunction can occur, and electromagnetic interference can increase. If you are not a
qualified electrical professional, do not do grounding work.
Always ground the drive, the motor and adjoining equipment to the ground/ protective
•
earth (PE) bus of the power supply. This is necessary for the personnel safety. Proper
grounding also reduces electromagnetic emission and interference.
In a multiple-drive installation, connect each drive separately to the ground / protective
•
earth (PE) bus of the power supply.
Make sure that the conductivity of the ground/ protective earth (PE) conductors is
•
sufficient. See the electrical planning instructions of the drive. Obey the local regulations.
Connect the power cable shields to the ground / protective earth (PE) terminals of the
•
drive.
Make a 360° grounding of the power and control cable shields at the cable entries to
•
suppress electromagnetic disturbances.
Note:
You can use power cable shields as grounding conductors only when their conductivity is
•
sufficient.
As the normal touch current of the drive is higher than 3.5mA AC or 10mA DC, you must use
•
a fixed protective earth (PE) connection. The minimum size of the protective earth
conductor must comply with the local safety regulations for high protective earth
conductor current equipment. See standard IEC/EN 61800-5-1 (UL 61800-5-1) and the
electrical planning instructions of the drive.
Additional Instructions for permanent magnet motor drives
Safety in installation, start-up and maintenance
These are additional warnings concerning permanent magnet motor drives. The other safety
instructions in this chapter are also valid.
WARNING! Obey these instructions. If you ignore them, injury or death and damage to the
equipment can occur.
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