Dräger PEX 3000 Manual Del Usuario página 35

Type XTR 0090 and XTR 0091:
– Connection between sensing head SE Ex and the transmitter as shown.
– The power supply may also be an integral part of the controller unit.
Cable screen
PEX 3000
contacted within
Type XTR 0000,
the cable gland
XTR 0001,
XTR 0010
Type XTR 0090,
and XTR 0011
Cable screen
contacted within
the cable gland
1 2 3
1 2 3
Connection to the controller:
Connect terminal +24 V to +24 volts
Connect terminal SIG to 4 to 20 mA input
Connect terminal 0 V to 0 Volt
|
Power supply
+24 Volts
24 V 20 %,
0 Volt
4 to 20 mA
0 mA
Controller Unit
PEX 3000
XTR 0091
max. cable length core cross-section
50 m 0.5 mm
100 m 1.0 mm
150 m 1.5 mm
Sensing head
Polytron SE Ex PR ... DQ
Connection to the sensing head:
Connect terminal br/br to terminal 1
Connect terminal ge/yw to terminal 2
Connect terminal sw/bk to terminal 3
0.15 A
Cable routing inside the transmitter
– Connect the insulated single conductors (min. conductor length 55 mm) to
the spring terminal clamp, the end stripped by around 5 mm, keeping them
as short as possible.
– For the wiring of the power supply and signal transmission, only use cables
with a cross-section of at least 0.75 mm
2
0.5 mm can be used if fitted with an insulated ferrule (Zoller+Fröhlich, type
V3AE0005, V3AE0037 or equivalent). This ensures that the degree of
protection IP 30 is preserved if the housing is opened for maintenance
purposes.
Only types XTR 0090 and XTR 0091:
2
– For the wiring between the gas measurement transmitter and gas sensing
2
head (e.g. sensing head SE Ex ... DQ), only use cables with a cross-section
2
of at least 0.75 mm
fitted with an insulated ferrule (Zoller+Fröhlich, type V3AE0005, V3AE0037
or equivalent). This ensures that the degree of protection IP 30 is preserved
if the housing is opened for maintenance purposes.
2
. Cables with a cross-section of
2
. Cables with a cross-section of 0.5 mm
| en
Operation
2
can be used if
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