Seitz 2A52W Mode D'emploi page 2

Safety
Correct Use
The solenoids are used for operating Eugen
Seitz AG valves. The appropriate solenoid must
be selected in conjunction with the manufactur-
er or one of his representatives. The solenoids
are classified as category 2 and equipment-
group II devices in compliance with EC-type-
examination certificate PTB 01 ATEX 2129 X
and are therefore suitable for use in areas with
potentially explosive gas-, vapour-, mist- and air
mixtures (zones 1 and 2) and in areas with dust
and air mixtures (zones 21 and 22).
Authorised persons
The tasks described here may only be carried
out by authorised personnel. Authorised per-
sonnel are those persons that have undergone
training in electrical engineering
(EN 60204-1).
Concerning these operating instructions
These operating instructions form a component
part of the product and must be integrated in
the relevant operating instructions of the sys-
tem- or machine description.
General Safety Warnings
Before starting any connection or
disconnection procedures, it must
be ensured, that the power supply is
disconnected and protected against
unauthorised reconnection.
The housing of the solenoid can
reach a temperature of more than
80ºC. The danger of burning exists
when the housing is touched.
In order to maintain protection against
explosion, the assembly instruc-
tions must be absolutely adhered to.
Please ensure that the dimensions
of the valve body are minimum 32
mm x 32 mm at a height of 54 mm,
in order not to exceed the maximum
surface temperature and tempera-
ture limit of the temperature class in-
dicated on the name plate. The heat
conductivity of the valve body must
correspond to that of steel, at least.
Any arrangement whereby there are
several valves to a single block is
prohibited. Modifications of any kind
in the solenoids are prohibited.
Warranty
Trouble-free operation
Trouble-free operation is only assured if the
prime information contained in chapter „Techni-
cal Data" is adhered to and the conditions listed
in „Operating Conditions" are fulfilled.
Type Designation
Example of a type designation:
2 A 52W
Construction type
Circuit type
Solenoid size
Explosion Protection
For gas-, vapour-, mist- and air mixtures
II 2 G Ex emb II T6 or T4 (temperature
class dependent on rated power)
Eugen Seitz AG CH-8623 Wetzikon
Operating instructions
solenoids
2A52W and 2C52W
0102
II 2 G/D
For dust- and air mixtures
II 2 D Ex tD A21 IP65 T80°C or T110° or
T130°C (max. surface temperature is depen-
dent on rated power)
Technical Data
Rated voltage
According to name plate
Rated frequency
According to name plate
Rated power
According to name plate
Operating time
100 % (continuous duty)
Ambient temperature
with rated power ≤ 7 W or ≤ 12 VA
for T1 to T6 and T80°C: - 20°C to +40°C
for T1 to T4 and T110°C: - 20°C to +70°C
with rated power ≤ 17 W or ≤ 23 VA
for T1 to T4 and T130°C: - 20°C to +40°C
Relative humidity
Max. 95 % (non-condensing)
Protection against soiling
IP 65 according to EN 60 529
Operating Conditions
Power supply
Harmonic oscillations have no effect on the
functioning of the device if the r.m.s. value of
the sum of all the voltages lies within the tol-
erances specified for the rated voltage.
Permissible voltage impulses:
Peak value:
Duration:
The permissible values for voltage interrup-
tions or loss depend on the valve. If neces-
sary, these can be obtained from the manu-
facturer.
The device must be protected for up to a
maximum of three times the rated current of
the solenoid (see name plate). Breaking ca-
pacity at least as great as the short-circuit
current to be expected at the place of instal-
lation.
Electromagnetic compatibility
These solenoids do not emit any radiated dis-
turbances (according to EN 61000-6-3).
Conducted disturbances are to be expected
Switzerland Phone +41 044 931 80 80
-15 %, +10 %
±2 %
≤ 1000 V
≤ 1.5 ms
www.seitz.ch info@seitz.ch
in the case of circuit type „A". Possible tran-
sient switching voltages:
- 200 V at rated voltage ≤ 60 V
– 600 V at rated voltage > 60 V – 250 V
Solenoids are not sensitive to radiated distur-
bances ( according to EN 61000-6-2).
For conducted disturbances, please consult
the specification for the power supply.
Surge voltages of the over-voltage category III
according to IEC 60664-1 are permissible be-
tween current-carrying parts and those parts
connected with the protective conductor.
Extreme demands
Please consult the manufacturer to discuss
extreme operating-/environmental conditions
such as ionising- and non-ionising radiation,
vibration, shock, permanent shock and hostile
environmental conditions.
Assembly/ Disassembly
Before beginning, the „Safety" and „General
Safety Warnings" sections must be read and
fully und erstood.
Assembly
Slide solenoid over the guide tube of the
valve.
Fasten with securing washer and nut.
Tighten the nut until loosening of the sole-
noid due to expected shocks and vibrations
is no longer possible.
Connection work
Open the cover and connect the solenoid
to the power supply using a cable (copper
crosssection of 0.75 to 2.5 mm
12 mm). The polarity does not matter.
Connection with local potential equalisation
via internal earthing clamp or external con-
nection clamp.
Before beginning initial operation, close the
cover and check whether the connected
current circuit is protected with a fuse ac-
cording to that stated on the name plate.
The solenoid may only be switched on if it
has been mounted on a valve body as de-
scribed under „General Safety Warnings."
Disassembly
Disconnect the connection cable (observe
„General Safety Warnings").
Loosen fastening nut.
Withdraw solenoid from the guide tube (only
with the equipment isolated from the power
supply, and dead!).
Disposal
To ensure explosion protection, solenoids
may not be repaired. Dispose of as special
waste or return to the manufacturer.
, outer ø 6 to
2