Installation BAT867-F
Release 01 12/2019
9
Requirements for connecting the supply voltage
The supply voltage is connected to the device casing through protective
elements exclusively.
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 power supply cable is suitable for the voltage, the current and the physical load.
Hirschmann recommends a wire diameter of 0.5 mm² to 0.75 mm² (AWG20 up to
AWG18).
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) as per IEC/EN 60950-1 or IEC/EN 62368-1.
Alternative 2
Relevant for North America:
The power supply complies with the requirements according to
NEC Class 2.
Alternative 3
All
of the following requirements are complied with:
The power supply complies with the requirements for a safety extra-
low voltage (SELV) or ES1 as per IEC/EN 62368-1.
A fuse suitable for DC voltage is located in the plus conductor of the
power supply.
The minus conductor is on ground potential. Otherwise, a fuse is also
located in the minus conductor.
Regarding the properties of this fuse:
See “Technical data” on page 40.
Table 2:
Requirements for connecting the supply voltage
Summary of Contents for Hirschmann BAT867-F
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