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ctrlX SAFETY "SafeMotion"
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Instructions with regard to specific dangers
Cross section of outer con-
ductor
70 mm2 (AWG 2/0)
4.2.2
Protective extra-low voltage as protection against electric shock
Protective extra-low voltage is used to connect devices with basic insulation at
extra-low voltage circuits.
At components of an electric drive and control system provided by Rexroth,
all connections and terminals with voltages up to 50 volts are PELV (Protec-
tive Extra-Low Voltage) systems. It is allowed to connect devices equipped with
basic insulation, such as programming devices, PCs, notebooks, display units,
to these connections.
Danger to life, risk of injury by electric shock! High electrical voltage by incor-
rect connection!If extra-low voltage circuits of devices containing voltages and
circuits of more than 50 volts (e.g., the mains connection) are connected to
Rexroth products, the connected extra-low voltage circuits must comply with
the requirements for PELV (Protective Extra-Low Voltage).
4.2.3
Protection against dangerous movements
Dangerous movements can be caused by incorrect control of connected
motors. In the following, the different reasons are listed:
● Improper or wrong wiring or cable connection
● Operating errors
● Incorrect parameter input prior to commissioning
● Malfunction of sensors and encoders
● Defective components
● Errors in the software or firmware
These errors can occur immediately after switch-on or after an undefined time
of operation.
As far as possible, the monitoring functions in the components of the elec-
tric drive and control system rule out malfunction in the connected drives.
Regarding personal safety, in particular the danger of personal injury and/or
property damage, this alone cannot be relied upon to ensure complete safety.
Until the implemented monitoring functions are active, it must be assumed in
any case that faulty drive movements will occur. The faulty movements depend
on the type of control and the operating state.
Dangerous movements! Danger to life, risk of injury, serious injury or property
damage!
Prepare a risk assessment for the system or machine, with their specific condi-
tions, in which the components of the electric drive and control system are
installed.
As specified in the risk assessment, the user has to provide monitoring func-
tions and higher-level measures in the system for personal safety. The safety
regulations applicable to the system or machine have to be included. Unin-
tended machine movements or other malfunctions are possible if safety devices
are disabled, bypassed or not activated.
Bosch Rexroth AG
Minimum cross section of equipment grounding conductor
Leakage current ≥ 3.5 mA
1 equipment grounding con-
ductor
35 mm2 (AWG 2)
2 equipment grounding conduc-
tors
-
R911404905, Edition 02
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