3.1 Section Safety
A CAUTION
Crush Hazard
Carrying the drive by the front cover may cause the main body of the drive to fall, resulting in minor or
moderate injury.
Always hold the case when carrying the drive.
NOTICE
Equipment Hazard
Only connect recommended devices to the drives braking transistor terminals.
Failure to comply could result in damage to the drive or braking circuit. Carefully review instruction manual
TOBP C720600 00 when connecting a braking option to the drive.
Do not share the ground wire with other devices such as welding machines or large-current electrical
equipment.
Improper equipment grounding could result in drive or equipment malfunction due to electrical interference.
Observe proper electrostatic discharge procedures (ESD) when handling the drive and circuit boards.
Failure to comply may result in ESD damage to the drive circuitry.
Never connect or disconnect the motor from the drive while the drive is outputting voltage.
Improper equipment sequencing could result in damage to the drive.
Do not use unshielded cable for control wiring.
Failure to comply may cause electrical interference resulting in poor system performance. Use shielded, twisted-pair
wires and ground the shield to the ground terminal o f the drive.
Do not modify the drive circuitry.
Failure to comply could result in damage to the drive and will void warranty.
Yaskawa is not responsible for any modification o f the product made by the user. This product must not be modified.
Check all the wiring to ensure that all connections are correct after installing the drive and connecting any other
devices.
Failure to comply could result in damage to the drive.
Connect braking circuits to the drive as shown in the I/O wiring examples.
Improperly wiring braking circuits could result in damage to the drive or equipment.
Do not check or test control circuit signals while the drive is running.
Improper use of test equipment could result in damage to the drive circuitry by short circuit.
Standard motors used with PW M drives may experience winding failures due to surge voltages, when input line
voltage is greater than 480 V or motor wire distance is greater than 100 meters.
Select a motor design with insulation tolerant of surge voltages and drive-rated motor for use with PW M
drives.
Failure to comply could lead to motor winding failure.
Do not connect control circuit ground terminals to the drive enclosure.
Improper drive grounding can cause control circuit malfunction.
Do not use the negative DC bus terminal "-" as a ground terminal. This terminal is at high DC voltage potential.
Improper wiring connections could damage the drive.
Before applying power to the drive, use power-off resistance checks to check for short-circuits between (R/L1, S/
L2, and T/L3) or between main circuit terminals and ground.
Failure to comply may result in damage to the drive from short-circuit.
44
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
