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ENGLISH
POLARIS
The directional photocell with POLARIS alignment,
composed of a transmitter and a receiver, fig. 1, with
infrared modulation, is a safety device. Darkening the
light beam produces a change of state of the electrical
contact on the receiver.
TECHNICAL SPECIFICATIONS
Power supply
24Vdc (19÷34Vdc)
24Vac - 5%
a
Absorbed current TX 30mA - RX 60mA
Nominal range 30 metres
Obstacle detection time 7 mSec
Operating ambient
temperature
-20 - +70 °C
Maximum contact load 0.1 A at 25Vac
Protection class IP 55
a
with regard to variations in the power supply voltage
INSTALLATION
Before proceeding with installation of the
photocells, it must be borne in mind that:
The pair of photocells, receiver and transmitter, must be
installed in alignment with each other.
If two pairs of photocells are contemplated, the
receivers must be positioned on opposite sides to avoid
mutual interference.
In the case of installations with photocells walled in, flush
mounted on, the walls, the sheaths must be prepared
for passage of the connection cables.
The POLARIS photocells can be installed in different
ways:
Walled in the Wall/post (fig. 3)
Make a cylindrical hole Ø60.5 mm (minimum) in the
wall/post to a depth of at least 50 mm.
Position the sheaths for passage of the cables.
Wall the photocell body directly into the wall/post.
Wait for the cement to set, then fit the photocell, as
described in the following paragraph.
flush Mounted on the Wall/post (fig. 5)
On the photocell body, open the two factory-prepared
holes (fig. 4) which will be used to fix the container.
Make a cylindrical hole, Ø60.5 x 50 mm in the wall/post
(fig. 5 ref. a).
Position the photocell body inside the hole and mark
the position of the two holes opened up previously
(fig. 5 ref. b).
The rawlplugs and fixing screws used must
satisfy the specifications shown in fig. 5 ref. c.
Do not use fastening components of larger size.
Make two fixing holes in the position marked.
Position the sheaths for passage of the cables.
Fix the photocell body.
flush Mounted on an iron post (fig. 6)
On the photocell body, open the two factory-prepared
holes (fig. 4) which will be used for fixing.
Make a cylindrical hole in the post, Ø 60.5 (fig 6 ref. a).
Position the housing within the hole and mark the position
of the two holes opened up previously (fig 6 ref b).
Make two fixing holes Ø3 mm (fig. 6 ref. c) in the position
previously marked.
Position the connecting cables.
Fix the photocell body using the two screws (Ø3.5x16 mm)
and the washers provided.
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With the Metal container Welded to the post (fig. 7).
Weld the metal container (optional) to the post.
Make a hole on the container in the most suitable
position for passage of the connecting cables.
The diameter of the hole must be suitable for the type
of cable used and any cable gland.
Position the connecting cables.
Position the photocell body and fix it using the screws
(Ø3.5x16 mm) and the washers provided.
Before positioning the photocell body, wait for the
metal container, which has just been welded, to
cool.
ASSEMBLY AND CONNECTION
Once the photocell body has been positioned, make the
electrical connections and fix the photocell.
The POLARIS photocells can be used as safety devices
or as pulse generators. The different solutions are shown
below:
A pair of photocells as a safety device (fig. 9).
A pair of photocells as a pulse generator (fig. 10).
Two pairs of photocells as a safety device (Fig. 11).
A pair of photocells as a pulse generator and safety
device (fig. 12).
A pair of photocells to control an electrical contact
(fig. 13).
The maximum contact load is 0.1A.
Before making the electrical connections, make sure that
the seal, fig. 8 ref. a, is positioned behind the photocell
contact block (fig. 8 ref. b).
Once the electrical connections have been made,
position the contact block within the photocell body and
fix it with the three screws provided.
At this stage, the three screws must be tightened
approximately 3 mm (2-3 turns of the screwdriver), so as to
permit subsequent alignment of the photocells.
ALIGNMENT
The alignment procedure must be performed using a
tester. Insert the tips of the tester into the two test points
on the receiver contact block, see fig. 14, observing the
polarity shown on the block.
Lighting up of the red LED on the receiver indicates the
pre-alignment condition.
Tighten the three fixing screws of both the receiver and
the transmitter, fig 15, until the direct current voltage
measured, reaches the values indicated in the following
table:
Distance between receiver
and transmitter
Control signal voltage
Up to 20 metres 7.5 Vdc
From 20 to 30 metres 6 - 7.5 Vdc
Once the alignment procedures are finished, remove
the tips of the tester and check that the photocells are
functioning. In case of incorrect alignment, the LED on
the receiver starts to flash.
FINAL OPERATIONS
Once the alignment procedures are finished, position the
two closing plugs, fig. 16, and the closure slide, fig. 17.
If it should be necessary to remove the slide, insert a flat
tip screwdriver into the lower slit of the photocell body
and turn it until the slide is removed, fig. 18.
MAINTENANCE
The POLARIS photocells do not require periodic
maintenance.
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