Videotec EXPT - Manual (Page 12)

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6.2.2 Installing the pan & tilt
For a wall-mounted P&T, the special bracket is used:
this is attached using the 4 holes, diameter 11mm.
For a parapet mounting, on the other hand, it is
possible to make use of the supporting disc on the
base, which has 4 holes, 8.5mm diameter, at 90°
intervals.
As regards this, to make sure the P&T is able to move
through its whole range, the bottom flange of the
central body and the support disc on the base have
two red vertically aligned marks.
When the P&T has been installed, these marks should
face the installer, because they represent the point
of reference for horizontal movement over the whole
range of ±180° with respect to the installation point.
Flange
(other side)
Marks
Fig. 04
6.2.3 Connecting the pan & tilt
h Before proceeding with the following
operations, make sure that the P&T control
unit voltage is correct.
To connect the pan & tilt to the control unit, use the
supplied multipolar cable. Refer to the electrical
diagram attached to this handbook and carry out the
following operations:
• Disconnect the control unit from the power supply;
• Make the connections with the P&T (motors,
camera, lens etc.);
• Power the unit;
• Carry out the operational tests.
6.2 Installation
h The installer must not use devices that
generate dangerous radiation.
One of the most important features of the EXPT
series P&T is the complete absence of rotation cables,
whether for controlling the P&T or for controlling the
camera. This means that installation and maintenance
of the P&T are simple.
The multipolar cable supplied is already connected
and leaves the base via the Ex d 3/4" NPT IP66
armoured barrier cable gland.
The two flanges on the housing and the three flanges
on the central body each have 12 screws, while the
two flanges on the base each have 6 screws. All the
screws have a hexagonal head and a M6 thread. In
addition, each flange has 3 screws at 120° intervals to
facilitate extraction of the flange itself. When the M6-
thread screws have been unscrewed from the flange,
turning the 3 screws at 120° intervals (one turn per
screw at a time, in turn) will make it easier to extract
the flange.
6.2.1 Installing the camera
To install the camera, you have to extract the flange
closing the housing, which also supports the plate to
which the camera will be attached, and the related
terminal board. This plate is supported on two guides
attached to the housing; when the flange is removed,
the plate slides along the guides, so that it is easy to
fit and connect the camera and its accessories. During
installation, we strongly recommend insulating the
camera from the support plate using the supplied
insulating spacers.
Before closing the flange, after installing the
camera, make sure that the 4 earth wires have been
connected (back cover, front cover, housing body,
terminal board) and make sure they have been
placed at the same potential.
We recommend a torque wrench setting of 12.5Nm
for the 12 screws closing the flange.
Fig. 03