Installation OCTOPUS OS3
Release
01
02/2019
7
Grounding the device
Grounding the device is by means of a separate ground connection on the
device.
Ground the device before connecting any other cables.
Disconnect the grounding only after disconnecting all other cables.
The overall shield of a connected shielded twisted pair cable is connected
to the grounding connector on the front panel as a conductor.
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:
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.
Requirements for connecting the signal contact
The following requirements apply without restrictions:
The connected voltage complies with the requirements for a safety extra-low voltage
(SELV) or ES1 as per IEC/EN 62368-1.
The connected voltage is limited by a current limitation device or a fuse.
Observe the electrical threshold values for the signal contact.
See “General data” on page 31.
Requirements for connecting the supply voltage
The following requirements apply without restrictions:
All of the following requirements are complied with:
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 wire diameter of the power supply cable is at least 1 mm² (North America: AWG16) on
the supply voltage input.
The following requirements apply alternatively:
Relevant when the device is supplied via 1 voltage input:
Relevant for North America:
The power supply complies with the requirements according to NEC Class 2.
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