Dräger PEX 3000 Mode D'emploi page 33

Connect terminal SIG to 4 to
20 mA input
Connect terminal 0 V to 0 volts
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 mm². Cables with a cross-section of
0.5 mm2 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:
– For the wiring between the gas measurement transmitter and gas sensing
head (e.g. sensing head SE Ex ... DQ), only use cables with a cross-section
of at least 0.75 mm2. Cables with a cross-section of 0.5 mm2 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.
Dräger PEX 3000
Connect terminal ge/yw to termi-
nal 2
Connect terminal sw/bk to termi-
nal 3
CAUTION
Blank cables must not stick out of the spring terminals. The method of explosion
protection during maintenance is based on the condition that it is not possible to
touch blank cable parts with a probe of 2.5 mm diameter (definition of IP 30).
Operation
OK
M