PiXtend eIO Hardware Manual
5.3. Protective Conductor Connection
Depending on the variant, PiXtend eIO devices are supplied with or without housing. If the
devices are to be used in an area in which dangerous voltages
control cabinet of a machine), we recommend the "Pro" versions with stainless steel cover.
The stainless steel hood has a special connection for the protective conductor (PE). This is
marked with the label "PE" and designed for common cable lugs or so-called "flat plug-in
sleeves" (width 6.35 mm).
Likewise, another protective conductor connection is available at the bottom of the DIN rail
housing made of aluminum. For safe operation, both the hood and the DIN rail housing
must be provided with a protective conductor connection.
2
As a rule, voltages greater than 50 V (DC or AC) are referred to as dangerous voltages. The most
common dangerous voltage is the mains voltage with 230 or 115 V AC. But there are also other
dangerous tensions.
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Figure 21: Protective earth (PE) connection at the
PiXtend eIO “Pro” cover
