Kontron KISS 4U X9SCAF - Manual (Page 36)

9. Starting Up KISS 4U V2 – User's Guide (Version 1.01)
9.2. DC Power Connection
The DC version of the KISS 4U V2 platform is equipped with a +24V or-48V power supply (with a 2-pin terminal block and
an ON/OFF power switch).
The system has to be mounted and installed only by qualified personnel for this area familiar with the
associated dangers.
It must be ensured that the platform can be powered ON and OFF via an easy accessible two pole isolating
switch and an overload protection. These should be incorporated in the building installation wiring.
The unit is only completely disconnected from the DC power source, when the DC power wires are
disconnected either from the power source or the unit. Therefore, the DC power wires and its connectors
must always remain easily accessible.
Please ensure that during the DC connection procedure, there is no power flowing from the external
DC power source to the KISS 4U V2 system.
1. Prepare two isolated wires according to the connectors of the screw terminal.
The minimum cross section of up to 4.00 mm 2 for the +24VDC PSU and minimum cross section of up to
2.5 mm 2 for the -48VDC PSU must be selected corresponding the KISS 4U V2 system configuration and the
customer-specific expansion cards installed.
In order to determine the minimum cross section of the power wires, please observe the table 3D and 3E
of the EN 60950-1.
2. Loosen the two cross-head screws of the screw terminal so that you can insert the stripped ends of the wires. Pay
attention to the polarity of the wires.
3. Fasten the cross-head screws firmly.
4. Cover the connectors of the screw terminal with the protective cover available.
After attaching the cables to the terminals of the DC PSU (+24VDC or -48VDC) always operate the
DC versions of KISS 4U V2 systems with the protective cover provided.
5. Prepare the other ends of the wires according to the terminal of the DC power source.
6. Connect the wires prepared to the DC power source. Pay attention to the polarity of the connectors. The DC power
source has to be switched off.
7. Switch on the DC power source.
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