11
item Controller BL 1-04 /C
― Product manual
Disconnect the electric equipment from the power supply via the main switch and secure it against reconnection. Wait until the
DC bus has discharged in the following cases:
▪ maintenance and repairs
▪ cleaning
▪ long downtimes
The standard motor holding brake that is included in the scope of supply or any other external motor holding brake that is
actuated by the servo drive is not suitable for the protection of the operators if used alone!
Be particularly careful during the installation process. During the installation and also later on during the operation of the
drive, ensure that no drilling chips, metal dust or installation parts (screws, nuts, cable sections) can fall into the servo drive.
Use suitable personal protective equipment during the installation.
Vertical axes must be additionally secured against falling down or lowering after the motor has been switched off, for example
by way of the following:
▪ mechanical locking of the vertical axis,
▪ external braking, catching or clamping devices, or
▪ sufficient weight counterbalance of the axis
Perform the start-up process with idling motors. This is to avoid mechanical damage, e.g. due to an incorrect direction of
rotation.
2.7 Protection against contact with electrical parts
DANGER
Dangerous electrical voltage!
In certain device constellations, the rapid discharge of the DC bus voltage of the servo drive may be rendered ineffective.
In these cases, the servo drives may still carry dangerous voltage levels up to 10 minutes after they have been switched off
(residual capacitor charge).
Wait 10 minutes prior to performing any work on the connections. Always measure the voltage with a suitable instrument.
To prevent accidents, injuries and damage to property:
Follow the national accident prevention regulations (for Germany, this is DGUV regulation 3 (formerly BGV A3)).
Do not touch the electrical connections of the components when they are switched on.
Prior to accessing electrical parts carrying voltages above 50 V, disconnect the device from the mains power supply or voltage
source. Secure it against reconnection.
Install the respective covers and guards against accidental contact prior to switching the device/system on. Rack-mounted
devices must be protected against accidental contact by way of an enclosure, e.g. a switch cabinet.
Prior to start-up and even for brief measurements or tests, connect the protective earth conductor (ground conductor) of all
of the electrical devices in accordance with the circuit diagram (see section 9 Electrical installation on page 52) in a fixed
manner (hardwiring) to the supply network or to the earthing system on site.
Comply with the minimum copper cross-section for the protective earth conductor (ground conductor) over its entire length
(see EN 61800-5-1). Otherwise, the housing may carry high voltages which can cause electric shock.
Due to the integrated line filters, the leakage current exceeds 3.5 mA. This is why two connection points must be hard-wired
The magnitude of the DC bus voltage must be taken into consideration during the installation process in order to ensure prop
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er insulation and protection. Ensure proper earthing (grounding), conductor rating and protection against short circuits.
