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Smart Buildings
Safety
2.8
Shielding ground
The shielding ground of the connectable twisted pair cables is connected to the ground connection as a
conductor.
Beware of possible short circuits when connecting a cable section with conductive shielding braiding.
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2.9
Requirements for connecting electrical wires
Before connecting the electrical wires, always verify that the requirements listed are complied with.
General requirements for connecting electrical wires
The following requirements apply without restrictions:
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Requirements for connecting the supply voltage
The following requirements apply without restrictions:
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The electrical wires are voltage-free.
The cables used are permitted for the temperature range of the application case.
Relevant for North America:
Exclusively use 60/75 °C (140/167 °F) or 75 °C (167 °F) copper (Cu) wire.
Enable the supply voltage for the device only when the following requirements are fulfilled:
- the terminal blocks are wired correctly
- the device casing is closed.
The supply voltage corresponds to the voltage specified on the type plate of the device.
The power supply complies with overvoltage category I or II or III.
The power supply has an easily accessible disconnecting device (for example a switch or a plug). This disconnecting
device is clearly identified. So in the case of an emergency, it is clear which disconnecting device belongs to which
power supply cable.
The power supply cable is suitable for the voltage, the current and the physical load. Smart Buildings recommends a
wire diameter of 0.5 mm² (AWG20).
A back-up fuse is located in the outer conductor of the power supply.
The neutral conductor is on ground potential at both voltage inputs. Otherwise, a back-up fuse is also located in the
neutral conductor.
Regarding the properties of this back-up fuse:
See IS/S 8.1.1 IP-Swich
3.4.4 Technical data on page 17
see ISP/S 8.1.1.1 IP-Swich PoE
The cross-section of the ground conductor is the same size as or bigger than the crosssection of the power supply
cables.
or
3.5.4Technical data auf Seite
26.
IS/S 8.1.1, ISP/S 8.1.1 | 9AKK107992A0761 EN Rev. B 7
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