
Installation BRS20/22/30/32/40/42/50/52
Release
12
01/2022 11
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 voltage connected complies with the requirements for a safety extra-low voltage
(SELV) as per IEC 60950-1 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 65.
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)
according to IEC 60950-1 or ES1 according to 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 wire diameter of the power supply cable is at least 1 mm² (North America: AWG16) on
the supply voltage input for PoE device variants.
The cross-section of the ground conductor is the same size as or bigger than the cross-
section of the power supply cables.
Depending on the voltage input used (characteristic value F, T, U, P) and the supply voltage
used (DC, AC), the following additional requirements apply:
Device variants
featuring supply
voltage with
characteristic
value F, T, U
All of the following requirements are complied with:
Supply with DC voltage:
There are fuses suitable for DC voltage in the positive conductors of
the supply lines, or the voltage sources are appropriately current-
limited. Regarding the properties of this fuse: See “Technical data”
on page 65.
The negative conductors of the voltage inputs are on ground
potential.
Device variants
featuring supply
voltage with
characteristic value F
All of the following requirements are complied with:
Supply with AC voltage:
There are fuses in the supply lines, or the voltage sources are
appropriately current-limited. Regarding the properties of this fuse:
See “Technical data” on page 65.
The power sources are electrically isolated from the ground
potential.