EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. C 13
Shut-off valve
Install a shut-off valve in the sample gas line (recommended
when the sample gas is pressurized).
Purging of the gas line system
Plan for the option of connecting an inert gas, such as nitrogen,
from the gas sampling point for purging the gas line system.
Installation Material
19″ housing (model EL3020)
• 4 raised head screws
(recommendation: M6; this depends on the cabinet/ rack
system)
• 1 pair mounting rails (design depending on the cabinet/
frame system), length approx. 240 mm corresponding to
approx. ⅔ the housing depth
Wall-mount housing (model EL3040)
4 M8 or M10 screws
Signal Lines
Select conductive material which is appropriate for the length of
the lines and the predictable current load.
Notes concerning the cable cross-section for connection of the
I/O modules:
• The maximum capacity of terminals for stranded or solid
conductors is 1 mm
2
(17 AWG).
• The stranded conductor may be tinned on the tip or
twisted for simplified connection.
• When using wire end ferrules the total section must not
exceed 1 mm
2
, i.e. the maximum stranded conductor
section cannot be greater than 0.5 mm
2
. The Weidmüller
PZ 6/5 crimping tool must be used for crimping the
ferrules.
Lengths and types of cables for the RS485 lines
• Maximum 1,200 m (transfer rate, maximum 19,200 bit/s).
• Three-core twisted-pair cable, conductor cross section
0.25 mm
2
(e.g. order number 746620)
Length of the RS232 lines
Maximum 15 m.
Mating connector (socket housing)
The required mating connector (socket housing) for the plug-
in terminal strips on the I/O modules is included in the scope
of delivery.
Power supply lines
• If the supplied power cable is not used, select conductive
material which is appropriate for the length of the lines and
the predictable current load.
• Provide a supply circuit isolator or a switched socket outlet
to be able to disconnect the power supply at all phases from
the gas analyzer if required.
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