BECKHOFF C9900-P208 - Manual (Page 12)

Installation Instructions
10 C9900-P208 / C9900-P209
Preparing the cable harness
A wiring harness is used for connecting the power supply unit with the
connection sockets in the Industrial PC. Due to different cable lengths, the
harness is produced individually for each type of computer.
The wiring diagram section shows the connection between the 7-pin power
supply unit connector and the 3-pin and 5-pin pin strip at the PC case:
Cable harness wiring
diagram
Insert fuse
Attention
The power supply of the customized components for shutting down the
PC must be protected with a fuse! To this end, a "flying" fuse (6.3A/
medium time-lag) is inserted in the line.
Note cable cross sections
The cable cross sections are 0.75 mm
2
/ AWG18 for connecting the switch
and 2.5 mm
2
/ AWG14 (screened) for connecting the power supply.
External wiring
The external wiring consists of the connection of the power supply, the
battery pack (only C9900-P209) and the connection of customized
components for shutting down the PC.
The external wiring occurs according to the wiring diagram, see chapter
Wiring diagram .
Cable Cross Sections
Note cable cross sections,
avoid voltage drop! For the connection of the power supply, wiring with a cable-cross-section
of 1.5 mm
2
must be used.
With bigger distances between voltage source and PC, you take the
voltage drop as a function of the cable-cross-section as well as voltage
fluctuations of your distribution voltage into account, so that is secured that
the voltage doesn't fall under 22 V at the power supply.
Insert fuse
Attention
The power supply must be protected with 16 A.