posirot
®
Magnetic angle sensors, dust-ex proof
Version 4.2.0
www.asm-sensor.com
5
•
In safety-relevant applications, additional facilities must be provided for maintaining
safety and preventing damage.
•
Check whether the protection class of the sensor is suitable for the application.
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1.3 Dust-ex proof marking
The Dust-ex proof marking according to the guideline 2014/34/EU is lasered on the sensor housing.
These are:
PRAS2EX, PRAS5EX-K:
II 3D
Ex tc IIIC T80°C Dc X
PRAS3EX, PRAS5EX-V:
II 3D
Ex tc IIIC T80°C Dc X
max. 1000rpm
This means:
II
=
Equipment-group II: Equipment
not
intended
for use in underground parts of mines, as
well as their overground plants, which are endangered by firedamp or/and combustible
dusts
3
=
Equipment category 3: Normal level of safety
– application in dust explosion hazardous
areas. Equipment in this category is intended for use in areas in which explosive
atmospheres
– in the case of this sensor caused by dispersed dust – are unlikely to
occur, or, if they do occur, are likely to do so only infrequently and for a short period
only.
Equipment in this category ensures the requisite level of protection during normal
operation.
D
=
Air/dust mixture
EX
=
This symbol indicates that the electrical equipment complies with one or more types of
protection
Tc
=
Ignition protection class: protection by enclosure IP65
IIIC
=
Group for conductive dust
T80°C
=
Maximum surface temperature of the angle sensor
Dc
=
Equipment Protection Level (EPL): EPL „Dc“ complies with the categorie 3D
X
=
Resists an impact with reduced impact energy of 4J, without X the sensor resists an
impact of 7J impact energy
max.
1000rpm
=
Max. revolutions of 1000 1/min resp. max. 1000rpm are admissible. A higher number of
revolutions can cause the surface temperature to exceed 80°C.
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