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4. ATEX Intrinsic Safety Marking and Electrical
Safety Parameters
4.1 Marking
The marking is on the serial plate stamped on the
496 cover (rep 14).
•Name and address of the manufacturer:
Dresser Produits Industriels S.A.S.
14110 CONDE SUR NOIREAU - FRANCE
•Type designation:
–496-858 for position transmitter
–496-858/• for position transmitter with
additional function(s)
the “•” can take the values 1, 2, 4, 5
–496-•58 for position switches
the “•” can take the values 1, 2, 4, 5
–496-158/• and 496-258/• for position switches
with additional function(s)
the "•" can take the values 1, 2
•Basic and complementary marking:
–Position transmitter alone or Position
transmitter equipped with microswitch(es)
(additional function):
Types: 496-858 or 496-858/1 or 496-858/2
II 1 GD
Ex ia IIC T.* Ga Tamb = -..°C à +..°C*
Ex ia IIIC T..°C* Da
–Positiontransmitter equipped with proximity
detector(s) (additional function):
Types: 496-858/4 or 496-858/5
II 1G
Ex ia IIC T.* Ga Tamb = -..°C à +..°C*
or
II 2G
Ex ia IIC T.* Gb Tamb = -..°C à +..°C*
–Position contactor alone equipped with
microswitch(es):
Types: 496-158 or 496-258 or 496-158/•or
496-258/•
II 1 GD
Ex ia IIC T.* Ga Tamb = -..°C à +..°C*
Ex ia IIIC T..°C* Da
–Position contactor alone equipped with
proximity detectors:
Types: 496-458 or 496-558
II 1G
Ex ia IIC T.* Ga Tamb = -..°C à +..°C*
or
II 2G
Ex ia IIC T.* Gb Tamb = -..°C à +..°C *
*Ambient temperatures ranges and surface temperatures for
the temperature classifications T6, T5 and T4 are given in
Annex I with:
•Tables 1, 2 and 3 for the transmitter alone, the
mechanical switch(es) alone and the proximity
switch(es) alone.
•Tables 4 and 5 for the transmitter with mechanical
switch(es) and for the transmitter with proximity
switch(es).
•Serial number
•Year of manufacturing
•Number of notified body ••••
•EC-Type examination certificate number
Warning:
AVERTISSEMENT : DANGER POTENTIEL DE
CHARGES ELECTROSTATIQUES –VOIR
INSTRUCTIONS
WARNING: POTENTIAL DANGER OF
ELECTROSTATIC CHARGES. SEE
INSTRUCTIONS
4.2 Electrical safety parameters
4.2.1 Type 496-•58
4.2.1.1 Option with 1 or 2 Micro-Switch(es)
•Type identification is: 496-158 and 496-258
•Mechanical switch(es): type BZ-2R72-A2,
manufacturer: HONEYWELL
•They are supplied by a certified power source
for explosible atmospheres group IIC with the
maximal characteristics:
–Constant power supply: Ui= 30V, Ii = 0.5A,
Ci = 0F and Li = 0H
–Alternative power supply: Ui= 90V, Ii = 1.4A,
Ci = 0F and Li = 0H
•The wiring connection is done directly on
mechanical switch(es).
4.2.1.2Option with 1 or 2 Proximity Switch(es)
•Type identification is: 496-458 and 496-558
•These detectors from PEPPERL & FUCHS are
defined as:
–II 1G Ex ia IIC T6 Ga
–II 2G Ex ia IIC T6 Gb
•EC type examination certificate:
–PTB 00 ATEX 2048 X (II1G, II2G)
–PTB 00 ATEX 2049 X (II1G, II2G)
