Safety notes for electrical drives and controllers
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2.4.3
Protection against contact with electrical parts
This section only concerns devices and drive components carrying voltages exceeding 50 V. Contact with parts carrying
voltages of more than 50 V can be dangerous for people and may cause electrical shock. During operation of electrical
devices some parts of these devices will inevitably carry dangerous voltages.
DANGER!
High electrical voltage!
Danger to life, danger due to electrical shock or serious personal injury!
The appropriate DIN, VDE, EN and IEC regulations as well as all national and local safety regulations and rules for the
prevention of accidents apply for the assembly and maintenance of the system. The plant engineer or the operator is
responsible for compliance with these regulations:
Before switching on the device, install the appropriate covers and protections against accidental contact.
Rack-mounted devices must be protected against accidental contact by means of a housing, for example a
switch cabinet. The national regulations for safety/accident prevention must be complied with!
Always connect the ground conductor of the electrical equipment and devices securely to the mains supply.
Due to the integrated line filter the leakage current exceeds 3.5 mA!
Comply with the minimum copper cross-section for the ground conductor over its entire length (see for
example EN 60800-5-1).
Prior to the initial operation, even for short measuring or testing purposes, always connect the ground
conductor of all electrical devices as per the terminal diagram or connect it to the ground wire. Otherwise the
housing may carry high voltages which can cause electrical shock.
Do not touch electrical connections of the components when switched on.
Prior to accessing electrical parts carrying voltages exceeding 50 Volts, disconnect the device from the mains
or power supply. Protect it from being switched on again.
For the installation the amount of DC bus voltage must be considered, particularly regarding insulation and
protective measures. Ensure proper grounding, wire dimensioning and corresponding short-circuit protection.
The device comprises a rapid discharge circuit for the DC bus as per EN 60204-1. In certain device
constellations, however, mostly in the case of parallel connection of several servo positioning controllers in
the DC bus or in the case of an unconnected brake resistor, this rapid discharge may be rendered ineffective.
The servo positioning controllers can carry voltage until up to 5 minutes after being switched off (residual
capacitor charge).
2.4.4
Protection against electrical shock by means of protective extra-low voltage (PELV)
All connections and terminals with voltages of up to 50 Volts at the servo positioning controller are protective extra-low
voltage, which are designed safe from contact in correspondence with the following standards:
International: IEC 60364-4-41
European countries within the EU: EN 61800-5-1
