Siemens SITRANS F M MAG 3100 Operating Instructions Manual page 16

Safety notes
2.2 Installation in hazardous area
● Sensor insulation thickness is max. 100mm (only insulated sensors).
● IEC/EN 61241-14 and 61241-17 are considered for installation in areas with combustible
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dust.
WARNING
Potential equalization
In operation, the output is earthed through the conductive medium being measured and
therefore potential equalisation is necessary throughout the hazardous area.
The apparatus housing shall be connected to the potential equalising conductor in the
hazardous area.
WARNING
External connections to Ex e terminals
The external connections to the Ex 'e' Terminals of the Remote version shall comply
with the following:
 The wire conductors shall have a cross-sectional area between 0.5 mm
 No more than one single or multiple strand wire conductor shall normally be
connected to each of the terminals. If multiple conductors are required, these shall be
joined in a suitable manner, e.g. two conductors into a single insulated crimped boot
lace ferrule.
 The insulation on the wire conductors shall extend to within 1mm of the metal of the
terminal throat.
 The terminal screws shall be tightened down with a torque between 0.5 Nm and 0.7
Nm.
 The terminals shall never be exposed to temperatures outside of the range -50°C to
+ 130°C; in addition, they shall only be installed and wired with cable in an ambient
temperature of -10 to +80°C. Furthermore, in the event of there being a process
temperatures of + 180°C in conjunction with an upper ambient temperature of +50°C
the terminal strips should not be installed or wired with cable.
WARNING
Explosive gas or dust
The terminal box shall not be opened when an explosive gas or dust atmosphere may
be present.
WARNING
"Flameproof enclosure" type of protection
Only open devices with type of protection "Flameproof enclosure" in hazardous areas
when the power to the device is turned off, otherwise there is a risk of explosion.
WARNING
SITRANS F M MAG 3100
Operating Instructions, 06/2010, A5E03005599-01
and 4 mm .
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