
Installation SPIDER-SL
Release
07
05/2022 9
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.
Requirements for connecting electrical wires
Before connecting the electrical wires, always verify that the
requirements listed are complied with.
Supply voltage
The supply voltage is only connected with the ground connection via
protective elements.
General requirements for connecting electrical wires
The following requirements apply without restrictions:
The electrical wires are voltage-free.
The cables used are permitted for the temperature range of the application case.
The switched voltage complies with the requirements for a safety extra-low voltage (SELV)
according to IEC 60950-1 or ES1 according to IEC/EN 62368-1.
Relevant for North America:
Exclusively use 60/75 °C (140/167 °F) or 75 °C (167 °F) copper (Cu) wire.
Requirements for connecting the supply voltage
The following requirements apply without restrictions:
The supply voltage corresponds to the voltage specified on the type plate of the device.
The power supply conforms to overvoltage category I or II.
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.
Hirschmann recommends a wire diameter of 0.5 mm² (AWG20).
The cross-section of the ground conductor is the same size as or bigger than the cross-
section of the power supply cables.
The following requirements apply alternatively:
Alternative 1 The power supply complies with the requirements for a limited power source
(LPS) according to IEC 60950-1 or ES1 + PS2 according to IEC/EN 62368-1.
Alternative 2 All of the following requirements are complied with:
The power supply complies with the requirements for a safety extra-low
voltage (SELV) according to IEC 60950-1 or ES1 according to IEC/
EN 62368-1.
A back-up fuse suitable for DC voltage is located in the plus conductor of
the power supply.
The minus conductor is on ground potential. Otherwise, a back-up fuse is
also located in the minus conductor.
Regarding the properties of this back-up fuse:
See “General technical data” on page 34.
Alternative 3 Relevant for North America:
The power supply complies with the requirements according to NEC Class 2.