Safety Instructions For Combi Power Modules - Siemens SINAMICS S120 Combi Manual

S120 Combi Power Modules

4.2 Safety instructions for Combi Power Modules

4.2 Safety instructions for Combi Power Modules
Electric shock due to connection to the line supply
If the S120 Combi is not disconnected from the line supply system (e.g. via the line
contactor or main switch), the DC link remains charged. Contact with live parts can result in
death or serious injury.
• Before starting any maintenance work, disconnect the S120 Combi from the line supply
Electric shock due to residual charge
A hazardous voltage is still present for up to 5 minutes after the power supply has been
switched off. Contact with live parts can result in death or serious injury.
• Remove the front plate only after 5 minutes have passed.
• When using expansion axes, check that the DC-link connection is in a no-voltage
• Only operate the S120 Combi when the front plate is mounted.
• When operating without expansion axes, do not remove the factory-mounted DC-link
• Do not continue to operate damaged components.
Electric shock due to contact with unused terminals X1 and X2
If cables are not connected to the terminals X1 (line connection) and X2 (motor connection
- spindle), contact can result in death or serious injury.
• Before starting any work on the connections, check for zero voltage.
Electric shock or fire due to overcurrent protective equipment that trips too late
Overcurrent protective devices that do not trip or trip too late can cause an electric shock or
fire.
• To protect personnel and for fire protection purposes, at the infeed point, the short-
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WARNING
using the line contactor or main switch.
WARNING
condition (de-energized).
cover.
WARNING
WARNING
circuit rating and loop impedance must correspond to the specifications in the
documentation in order for the installed overcurrent protection devices to trip within the
specified time.
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7