Bosch Rexroth IndraDrive C HCS03.1, Planning Manual

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3-6
Safety Instructions for Electric Drives and Controls Rexroth IndraDrive C HCS03.1
DOK-INDRV*-HCS03.1****-PR02-EN-P
3.6 Protection Against Electric Shock by Protective Low
Voltage (PELV)
All connections and terminals with voltages between 0 and 50 Volts on
Rexroth products are protective low voltages designed in accordance with
international standards on electrical safety.
WARNING
High electrical voltage due to wrong
connections! Danger to life, bodily harm by
electric shock!
⇒
Only connect equipment, electrical components and
cables of the protective low voltage type (PELV =
Protective Extra Low Voltage) to all terminals and
clamps with voltages of 0 to 50 Volts.
⇒
Only electrical circuits may be connected which are
safely isolated against high voltage circuits. Safe
isolation is achieved, for example, with an isolating
transformer, an opto-electronic coupler or when
battery-operated.
3.7 Protection Against Dangerous Movements
Dangerous movements can be caused by faulty control of the connected
motors. Some common examples are:
•
improper or wrong wiring of cable connections
•
incorrect operation of the equipment components
•
wrong input of parameters before operation
•
malfunction of sensors, encoders and monitoring devices
•
defective components
•
software or firmware errors
Dangerous movements can occur immediately after equipment is
switched on or even after an unspecified time of trouble-free operation.
The monitoring in the drive components will normally be sufficient to avoid
faulty operation in the connected drives. Regarding personal safety,
especially the danger of bodily injury and material damage, this alone
cannot be relied upon to ensure complete safety. Until the integrated
monitoring functions become effective, it must be assumed in any case
that faulty drive movements will occur. The extent of faulty drive
movements depends upon the type of control and the state of operation.