15 of 35 REF: CCU3/C-4100.DOC REV: M September 26, 2005
3.4.4. Connecting the CCU3/C-4100 to Power
Connect the 24V DC power source to the supplied connector. The power connector
is easily identified as the largest 3-way plug.
These connections are written on the top of the unit.
Pin number Function
V+
24V
V- COM
Earth
Table 4
3.4.5. Earth Connection
For correct installation and protection of the CCU3/C device the CCU3 must be
mounted on an earthed metal plate. This is important for correctly dissipating any
static discharge on the communication lines (as caused by an electrical storm) and
thereby preventing damage to this unit.
The Earth Flt Switch must be in the ON position for COM1, COM2 and COM3 for
earth fault to be reported to XLGraphics.