Eaton PowerXL DG1 - Figure 28. Thermistor;Sto Wiring Diagram; Figure 29. Example of Wiring a STO with the Internal 24 V Supply; Figure 30. Example of Wiring a STO with the Internal 24 V Supply; Safe Torque off (STO)

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Chapter 6—Installation requirements
POWERXL SERIES VFD MN040002EN—February 2018 www.eaton.com
Safe torque off (STO)
Refer to Appendix E for details of STO.
The PowerXL Series includes Safe Torque Off (STO)
functionality as standard and provides:
•
Isolation from the control board will stop IGBT from firing
•
Functional safety SIL1 certification: IEC/EN 61800-5-2 and
DIN EN ISO 13849-1, Performance Level C
Figure 28. Thermistor/STO wiring diagram
Switch
In the Figure 28 wiring diagram above the activation switch
would represent a component such as a manual operated
switch and Emergency stop push button or the contacts of
asafety relay or safety PLC.
Cable type
It is recommended to use double-shielded twisted-paircable.
Maximum cable lengths:
•
300 m (984 ft) between activation switch and controlboard
•
60 m (200 ft) between multiple drives
Grounding
Grounds between the drive and the activation switch should
be connected to the drive end. Grounds between two drives
should only be grounded to a signal drive.
Figure 29. Example of wiring a STO with the internal
24V supply
Figure 30. Example of wiring a STO with the internal
24V supply to multiple drives