Functional Safety - Lenze i550 Series Project Planning Manual

Information on electrical installation

Functional safety

Functional safety
DANGER!
Improper installation of the safety engineering system can cause an uncontrolled starting
action of the drives.
Possible consequences: Death or severe injuries
▶ Safety engineering systems may only be installed and commissioned by qualified and skilled
personnel.
▶ All control components (switches, relays, PLC, ...) must comply with the requirements of the
EN ISO 13849−1 and the EN ISO 13849−2.
▶ Switches, relays with at least IP54 enclosure.
▶ Control cabinet with at least IP54 enclosure.
▶ It is essential to use shields for the wiring.
▶ It is essential to use insulated wire end ferrules for wiring.
▶ All safety relevant cables outside the control cabinet must be protected, e.g. by means of a
cable duct
▶ Ensure that no short circuits can occur according to the specifications of the
EN ISO 13849−2.
▶ All further requirements and measures can be obtained from the EN ISO 13849−1 and the
EN ISO 13849−2.
▶ If an external force acts upon the drive axes, additional brakes are required. Please observe
that hanging loads are subject to the force of gravity!
▶ The user has to ensure that the inverter will only be used in its intended application within
the specified environmental conditions. This is the only way to comply with the declared
safety-related characteristics.
DANGER!
Automatic restart if the request of the safety function is deactivated.
Possible consequences: Death or severe injuries
▶ You must provide external measures according to EN ISO 13849−1 which ensure that the
drive only restarts after a confirmation.
NOTICE
Excessively high humidity or condensation
Malfunction or destruction of the safety component
▶ Only commission the safety component when it has acclimatised.
NOTICE
Overvoltage
Destruction of the safety component
▶ The maximum voltage (maximum rated) at the safety inputs is 30 V DC. The user must make
provisions to avoid that this voltage is exceeded.
Identification of the components
Safety components and the respective terminals are yellow.
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