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Appendix E—STO function
POWERXL SERIES VFD MN040002EN—February 2018 www.eaton.com
The STO terminal block shall be short circuited by jumper if
user doesn’t needed STO function.
If the function is used by customer, the STO terminal block
shall be connected to emergency stop switch, safety relay
or PLC, and so on.
The STO function needs to be always on, which means the
idle-current principle shall be followed by the end user.
Figure 56. Thermistor STO wiring diagram
Re quirements of proof test
•
Th is device must be subjected to a full test at least once
every 20 years.
•
The STO function must be verified.
•
The system response time must be verified to check
whether it is still ≤ 1ms.
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