Installation GRS105/GRS106
Release
01
11/2021
13
2.9.3 Requirements for connecting the supply voltage
The supply voltage is connected to the device casing through protective
elements exclusively.
The supply voltage is electrically isolated from the casing.
Before connecting the supply voltage, always verify that the requirements
listed are complied with.
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 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 cross-section of the ground conductor is the same size as or bigger
than the cross-section of the power supply cables.
The power supply cable is suitable for the voltage, the current and the
physical load. Hirschmann recommends a conductor cross section of
0.5 mm² to 0.75 mm² (AWG20 up to AWG18).
2.9.4 Requirements for connecting the signal contact
Before connecting the signal contact, always verify that the requirements
listed are complied with.
The following requirements apply without restrictions:
The connected voltage complies with the requirements for a safety extra-
low voltage (SELV) as per IEC/EN 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 “Signal contact” on page 62.
2.10 LED or laser components
LED or LASER components according to IEC 60825-1 (2014):
CLASS 1 LASER PRODUCT
CLASS 1 LED PRODUCT
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