Safety notes for electrical drives and controllers
Page 26
2.4.4
Protection against electric shock by way of protective extra-low voltage (PELV)
All of the connections and terminals with voltages up to 50 V of the servo positioning controller have protective extra-low
voltage. They are insulated in accordance with the following standards:
International: IEC 60364-4-41
European countries within the EU: EN 61800-5-1
DANGER!
High electrical voltage caused by incorrect connections!
Danger to life and risk of injury due to electric shock!
Only devices, electrical components, and wires or cables with protective extra-low voltage (PELV) may be connected to
connectors and terminals with voltages from 0 to 50 V.
Connect only those voltages and circuits that are securely isolated from any dangerous voltages. This isolation can be realised
by way of isolation transformers, safe optocouplers, or battery operation without mains power.
2.4.5
Protection against dangerous movements
Dangerous movements can be caused by the faulty actuation of the connected motors. Causes may be as follows:
improper or faulty wiring or cabling
errors during the operation of the components
errors of the sensors and transducers
defective or non-EMC-compliant components
software errors in superordinate control system
These errors can occur directly after the activation of the device or after some time during the operation.
The monitoring systems in the drive components exclude any malfunction in the connected drives to the greatest possible
extent. However, in view of the protection of the operators, particularly in terms of the risk of injuries and/or damage to
property, relying solely on this measure is not recommended. Until the built-in monitoring systems become effective, faulty
drive movements should always be anticipated. The extent of these faulty drive movements depends on the type of control and
on the operating state.
DANGER!
Dangerous movements!
Danger to life, risk of injury, serious personal injury, or damage to property!
