Lenze 8400 BaseLine Manual - Manual (Page 15)

Safety instructions
Residual hazards
2

15 EDS84ABD302 EN 4.0
2.3 Residual hazards
Protection of persons
ƒ Before working on the controller, check if no voltage is applied to the power
terminals because
– depending on the device - the power terminals L1, L2/N, L3, U, V, W, +UG, - UG and
RB remain live for at least 3 minutes after disconnecting the mains.
– the power terminals L1, L2/N, L3; U, V, W, +UG, - UG and RB remain live when the
motor is stopped.
Device protection
ƒ Connect/disconnect all pluggable terminals only in deenergised condition!
ƒ Detach the controllers from the installation, e.g. from the rear panel of the control
cabinet, only in deenergised condition!
Motor protection
ƒ Depending on the controller settings, the connected motor can be overheated by:
– For instance, longer DC-braking operations.
– Longer operation of self-ventilated motors at low speed.
Protection of the machine/system
ƒ Drives can reach dangerous overspeeds (e.g. setting of high output frequencies in
connection with motors and machines unsuitable for such conditions):
– The controllers do not offer any protection against such operating conditions. Use
additional components for this purpose.
Parameter set transfer
ƒ During the parameter set transfer, control terminals of the controllers can adopt
undefined states!
– Therefore it is required to disable the terminal X4 (digital input signals) before the
transfer starts. This ensures that the controller is inhibited and all control
terminals have the firmly defined ”LOW” status.
ƒ Switch contactors in the motor cable only if the controller is inhibited.
When switching contactors in the motor cable while the controller is enabled, you can
activate monitoring functions of the controller. If no monitoring function is activated,
switching is permissible.