KBox A-103 – User Guide, Rev. 3.0
// 49
8/
Starting Up
The KBox A-103 must be only operated with the nominal voltage of 24V DC of type SELV. For
details refer to the chapter 10/ “Technical Specifications”.
8.1.
Connecting to DC Main Power Supply
The DC input connector (Figure 10 and Figure 11 marked X101) is located on the front side of the KBox A-103. The KBox
A-103 will be connected to a DC main power supply via the supplied Phoenix power plug terminal (see Figure 36) and
corresponding power wires (not included).
Before using your system, become familiar with the system components and check that
everything is connected properly. Following a proper cabling procedure will prevent a false
power-on condition, which could result in unit operational failure.
When you install/disconnect the unit, the functional earth connection must always be made
first and disconnected last.
Also, it is recommended that the last connections attached to the system should be the
power wires!
The KBox A-103 must be connected DC mains power supply complying with the SELV (Safety
Extra Low Voltage) requirements of EN 60950-1 standard.
It must be observed that wiring and short-circuit/overcurrent protection is performed
according to the applicable standards, regulations and respect to the electrical specification
of the KBox A-103.
Even when the system is turned off via the power button (Figure 10 and Figure 12, marked
PWR) parts of the system are still energized.
The disconnecting device (fuse/circuit backer) rating must be in accordance with the wire
cross-section and the rated current of the KBox A-103.
The wires used for power connections must be clearly marked (+/-/functional earth) to
ensure that they will be proper connected to the DC IN connector of the KBox A-103 and to
the main power source, corresponding to signals marked. Refer to Figure 11 and Figure 36.
In addition, the cables must have some form of support so as to minimize the strain on the
unit’s connectors.
To connect the KBox A-103 to a corresponding DC main power supply, please perform the following steps:
1.
Ensure that the DC power source is switched off via a disconnecting device (circuit breaker), in order to ensure
that no power is flowing from the external DC power source during the connection procedure.
2.
Connect at first the wire for “Functional Earth stud” (Figure 18, pos. 5) to an appropriate “common earth”
connection point.
3.
Connect the Phoenix power terminal prepared as described in the subsection 7.2.1 “Cabling” to the DC input
connector (Figure 10 and Figure 11 marked X101) of the KBox A-103. The DC input connector is located on the front
side and is marked “24VDC”.
4.
Connect the other ends of the DC power wires to the connections of the DC main power supply. Pay attention to
the polarity of the connections.
5.
Switch on the disconnecting device (circuit breaker) in order to apply voltage to the terminals of the power wires.
