POLARIS PROFESSIONAL
- für Zone 1/21
POLARIS Panel PC Professional 10,4" / 12,1" / 12,1" W
Installation
Technical data subject to change.
04/2019
EN 45/68
6.8
EMC (Electromagnetic compatibility)
This is a class A unit and can cause radio interference in residential areas; if it does, the
owner/managing operator may be required to implement suitable measures and pay for
loss or damage.
Only shielded conductors may be used as connecting conductors. This applies both to
the data line and to all other conductors too.
The data lines must be stranded in pairs.
Example 2 x 2 x 0.75 mm² LIYCY TP.
As far as possible, separate conductors should be used for power supply and data
6.8.1
Voltage supply (AC- and DC- variants)
To supply voltage to the DC variant, it is necessary to use a regulated power supply unit
with a power level of at least 5 A. The voltage supply at the place of installation may neither
exceed nor drop below DC 24 V
10 %. Observe the voltage drop on the supply cable and
correct if necessary.
The voltage drop in the DC variant of the supply line is calculated with the following formula:
U
Voltage drop on the supply line at power supply
voltage of DC 24 V
Max. 2.4 V
U
Voltage drop on the supply line with maximum
permissible mains adapter overvoltage
DC 24 V +10 % (26.4 V)
Max. 4.8 V
(until 10 % undervoltage is
achieved)
I
Electricity for a POLARIS
At least 4 A
A
Cable cross-section of the supply line
Specific conductance of copper
56
m
mm
²
l
Length of the supply line (consider both the
outgoing and return line)
R
l
A
R
U
I
U
l
A
I
If the voltage drop cannot be balanced out or the calculation produces excessive cable
cross-sections, a separate mains adapter must be installed near the installation site.
Example:
pressure-tight encapsulation or ex-free area on the outside of the building.
As a result of the connection of the power supply to the POLARIS, the earth for the
power supply is connected to the PE. It is essential to ensure that the earth for the power
supply on the POLARIS, if this is not electrically isolated, indicates no potential
difference to the PE/PA.
