item Controller BL 1-04 /C
― Product manual
12
2.8 Protection against electric shock by way of protective extra-low voltage (PELV)
DANGER
Dangerous electrical voltage!
There is a risk of high electrical voltage due to incorrect electrical connections. Always follow the safety instructions stated
hereinbelow.
All of the connections and terminals with voltages up to 50 V of the servo drive have protective extra-low voltage. They are
protected against contact in accordance with IEC 61800-5-1 and EN 61800-5-1.
Only devices, electrical components and wires or cables with protective extra-low voltage (PELV) may be connected to connec
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tors and terminals with voltages from 0 to 50 V.
When connecting voltages and circuits, ensure that they 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.
2.9 Protection against dangerous movements
WARNING
Risk of injury due to dangerous movements
Always follow the safety instructions stated hereinbelow.
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 the 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 damage to prop
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erty, 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.
For the reasons mentioned above, protection must be ensured by monitoring or by superordinate measures. This must be
implemented by the system manufacturer based on the specific system situation and on a hazard and fault analysis. This also
includes the safety rules and regulations that apply to the system. Random movements of the machine or other malfunctions
may be caused by deactivating, bypassing or failing to activate the safety devices.
2.10 Protection against contact with hot parts
WARNUNG
Risk of burns due to hot surfaces
The servo drive and, in particular, the (external or internal) braking resistor may become hot during operation. Always wait a
sufficient amount of time prior to touching these parts.
Always use suitable personal protective equipment to avoid severe burns.
DANGER
