3 Assembly and installation
BU 0630 en-2020 29
Remove the control
terminals and blank
cover.
Remove the STO
contact jumper.
Install the SK CU5-STO
customer unit.
Install the control
terminals and blank
cover.
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3.2 Electrical connection
The information for installation or electrical connection from the manual BU 0600 as well as all of the
following information must be observed.
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Electric shock
Touching electrically conducting components may cause an electric shock and severe or possibly fatal injury.
• Disconnect the frequency inverter from the power supply before starting installation work.
• Only work on devices which have been disconnected from the power supply.
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Electric shock
The frequency inverter carries hazardous voltage for up to 5 minutes after being switched off.
• Only start work after a waiting period of at least 5 minutes after switching off the mains supply
(disconnection).
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3.2.1 Wiring guidelines
Wire end sleeves must be used if flexible cables (multiple strand or fine-wire) are used for the
connections X19 (at position X17) or X20. In addition, the wiring guidelines in the frequency inverter
manual (BU 0600) also apply.
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3.2.2 Mains connection
Devices for implementation of a safety function must only be operated on TN, TT and IT networks.
Grounded Corner operation is not intended.
For operation in IT networks
• the IT network screws must be removed
• a braking resistor must be used
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