Eaton Rapid Link RAMO5, Manual

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2 Engineering
2.8 STO function
Rapid Link 5 · RAMO5 · RASP5 10/19 MN034004EN www.eaton.com
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2.8.3 STO-compatible installation
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DANGER
Make sure to use proper grounding and select cables based on
local regulations or standards.
The variable frequency drive may have a leakage current greater
than 3.5 mA AC or 10 mA DC. In addition, the grounding cable
must be sized for the maximum mains fault current, which is
normally limited by fuses or miniature circuit-breakers.
Appropriately sized fuses or miniature circuit-breakers should be
installed at the mains supply for the variable frequency drive in
line with local regulations or standards.
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DANGER
The “STO wiring” must be protected against unintended short-
circuits and unintended tampering and modifications.
It must be ensured that the “STO input signal” has a safe oper-
ating state.
￫
In order to prevent damage to the variable frequency drive,
the devices should remain in their original packaging until right
before they are installed.
They must be stored in a dry and clean area with a temperature
range of -40 °C to 60 °C.
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The conductor cross-section used for the STO installation
should be between 0.75 and 2.5 mm
2
.
The length of the cable connected to the control signal terminals
should not exceed 25 meters.