8
Installation BRS20/30/40/50
Release
02
11/2018
Grounding the device
The housing is grounded via the separate ground screw on the bottom left
of the front side of the device.
Ground the device before connecting any other cables.
Disconnect the grounding only after disconnecting all other cables.
Requirements for connecting electrical wires
Before connecting the electrical wires, always verify that the
requirements listed are complied with.
Requirements for connecting the signal contact
Before connecting the signal contact, always verify that the requirements
listed are complied with.
Requirements for connecting the supply voltage
Before connecting the supply voltage, always verify that the requirements
listed are complied with.
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.
The AC power source is electrically isolated from the ground potential. The power source
is current-limited or there is a fuse in the supply line. Regarding the properties of this fuse:
See “Technical data” on page 54.
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 “Technical data” on page 54.
Prerequisites:
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 complies with the requirements for a safety extra-low voltage (SELV) or
ES1 as per IEC/EN 62368-1.
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 0.75 mm² (North America: AWG18)
on the supply voltage input.
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:
Relevant when the device is supplied via 1 voltage input:
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