3 – Mechanical installation
Digital Modules
The cabling is the subject of the paragraph Wiring and Electrical
Connections on page 33.
Gas detectors
Refer to the manual supplied with each detector.
Location
Each detector shall be positioned at ground level, on the ceiling, at the height
of the respiratory tract, or near air extraction ducts, depending on the density
of the gas to be detected or applied. Heavy gases are detected close to the
ground, while lighter gases are present along the ceiling. If necessary, contact
Oldham for any questions regarding proper detector positioning.
Fixing
The detectors shall preferably be positioned in an accessible place so that
inspections and maintenance can be carried out as well as to ensure the
absolute safety of the operators. The detectors must not be obstructed by
anything that will prevent them from measuring the ambient environment to be
checked.
If mounting an OLCT 10N on a vertical surface, position the cable gland
downwards.
Other models
Location
The relay modules, logic outputs, analog outputs, and analog inputs are
positioned depending on the installation layout, mandatorily in places free
from explosive atmospheres, protected from humidity, dust, and temperature
variations; for example in technical cabinets.
Fixing
These modules shall be mounted on
a DIN rail in a cabinet or in an
electrical cabinet.
For relay modules connected to low
voltage electrical parts, the
installation is carried out according to
the standards in force.
Figure 7: Fixing of a module (relay, logic
outputs, or analog outputs or inputs) on a
DIN rail.
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