Functional Safety - Lenze i950 Series Mounting And Switch-On Instructions

Electrical installation

Functional safety

Functional safety
DANGER!
Improper installation of the safety engineering system can cause an uncontrolled starting action of the
drives.
Possible consequence: Death or severe injuries
▶ Safety engineering systems may only be installed and commissioned by qualified personnel.
▶ All control components (switch, relay, PLC, ...) must comply with the requirements of EN ISO 13849−1 and
the EN ISO 13849−2.
▶ Switches, relays with at least IP54 degree of protection.
▶ Always mount devices with a degree of protection lower than IP54 in control cabinets with a minimum
degree of protection of IP54.
▶ The wiring must be shielded.
▶ 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!
▶ For safety-related braking functions, use safety-rated brakes only.
▶ 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
Overvoltage
Destruction of the safety component
▶ Make sure that the maximum voltage (maximum rated) at the safe inputs does not exceed 30 V DC.
NOTICE
Excessively high humidity or condensation
Malfunction or destruction of the safety component
▶ Only commission the safety component when it has acclimatised.
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