Mounting The Transmitter; Installing Electrical Connections; Connection Between Transmitter And Controller Unit - Dräger PEX 3000 Instrucciones Para El Servicio

Installing Transmitter

Mounting the transmitter

By means of fours screws (diameter 4 mm) through the holes of the housing
(drilling template see page 29).

Installing Electrical Connections

— Electrical wiring is only to be laid and connected by an expert paying attention
to the pertinent regulations and laws concerning electrical equipment in poten-
tially explosive atmospheres as well as the approval conditions.

Connection between transmitter and controller unit

The maximum cable length for loads of 250 Ohms can be extracted from the follo-
wing table:
minimum supply
voltage at
controller side
18 V
20 V
22 V
24 V
26 V
28 V
By means of 3-core screened cable, (braided screen, cover ≥ 80 %), outer
diameter min. 7 mm, max. 12 mm. Connect Shielding as short as possible to earth
clamp of the controller unit.
By means of the connecting cone within the cable gland the cable-screen has to
be contacted to the internal conductive surface of the enclosure as shown. With
this the required RF-immunity according to EN 50 270 is ensured.
ca. 55 mm
Remark:
The cable gland is explicitly approved for fixed installations and outer cable
diameters between 7 and 12 mm.
Page 8 of 42
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0.5 mm
(36 Ohms/km) (24 Ohms/km)
416 m
555 m
694 m
833 m
972 m
1110 m
core cross-section
2
0.75 mm 1.0 mm
(18 Ohms/km)
625 m
833 m
1041 m
1249 m
1457 m
1666 m
2
1.5 mm
(12 Ohms/km)
833 m 1249 m
1110 m 1666 m
1388 m 2082 m
1666 m 2498 m
1943 m 2915 m
2221 m 3331 m
ca. 12 mm
9023810 - 2nd edition - September 2005
2