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ASCO CONTROLS BV
P.O. Box 3, 3925 ZG Scherpenzeel, The Netherlands
Tel. +31(0)33 277 79 11 - Fax +31(0)33 277 45 61 / www.asconumatics.eu
DRAWING DESSIN ZEICHNUNG
DISEGNO TEKENING
DRAWING DESSIN ZEICHNUNG
DISEGNO TEKENING
GB
DESCRIPTION
FR
DESCRIPTION
DE
BESCHREIBUNG
IT
DESCRIZIONE
NL
BESCHRIJVING
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Intrinsically safe/low power solenoid operator (ISSC – MXX)
GENERAL
This installation and maintenance instruc-
tion sheet of the solenoid is a general sup-
plement to the particular I&M sheet for the
valve. The identification is made by prefix IS
to the catalogue number. Always use both
I&M sheets for installing and maintaining
the solenoid valve.
DESCRIPTION
The solenoid valves are designed in accord-
ance with Annex II of the European Directive
94/9/EC and IEC standards EN 13463-1,
EN-IEC 60079-0, EN-IEC 60079-11,
EN-IEC 60079-26, EN-IEC 61241-0 and
EN-IEC 61241-11.
Classification: II 2G/Ga Ex ia IIC / Ex iaD 21
IP65.
INSTALLATION
ASCO Numatics components are intended
to be used only within the technical char-
acteristics as specified on the nameplate.
Changes to the equipment are only al-
lowed after consulting the manufacturer or
its representative. These solenoid valves
are intended for installation in potentially
explosive atmospheres, Groups II A, II B or
II C gases, vapors, mists or dusts (Group
G/D, category 2). The surface temperature
classification is T6/85°C.
ELECTRICAL INSTALLATION
Wiring must comply with local and national
regulations of explosion proof equipment.
Application of the IS solenoid in the haz-
ardous area is not permitted without the
addition of an approved and classified
device (such as barriers), located between
the safe and the hazardous area. The
purpose of the safety device is to protect
the equipment located within the hazard-
ous area from current and voltage surges,
which might enter the system from the
energy sources located in the safe area.
In addition the wiring to the equipment
installed within the hazardous location
should satisfy particular requirements with
respect to resistance (R), inductance (L),
capacitance (C), inductance to resistance
ratio (L/R) and screening. Due to redun-
dant blocking diodes the effective internal
inductance and capacitance of the solenoid
are neglibly small. To make the electrical
connection to the spade plug connector,
strip the outer insulation of the cable back
over approximately 30 mm and the insula-
tion from the leads over 5 mm. Select the
proper sealing ring Ø 6-8 mm or Ø 8-10 mm
depending on cable diameter. Insert cable
through the compression screw, washer,
sealing ring and connector housing and
connect wires to the terminal block. Place
terminal block into connector housing and
assemble connector cover. Note that the
cover must be pressed properly to the con-
nector until a ‘click’ is heard. The terminal
block can be mounted in four different posi-
tions to select the most favourable position
for the cable entry. Assemble the sealing
ring, washer and tighten the compression
screw into the connector housing in such
a manner that the seal fits tightly around
the cable. Position connector gasket, place
connector over coil spades and tighten the
central screw to specified torque to ensure
proper gaskets compression. The coil itself
can be rotated 360° to select the most fa-
vourable position for the cable entry.
ELECTRICAL SPECIFICATIONS
Nominal operating voltage range:
24 VDC +/- 10%.
Minimum series resistance required:
200 Ohms.
Maximum allowable system leakage cur-
rent: 1 mA.
Intrinsically Safe Coil Calculations
The following application information will
allow the calculation of the loop current for
the ASCO intrinsically safe solenoid.
Definitions:
V
supply
The supply voltage to the
barrier.
T
ambient
The ambient temperature
in degrees C.
R
barrier
The maximum barrier end to
end resistance.
R
loop
The maximum resistance in
lead wire
R
coil
The resistance of the solenoid
coil at Tambient
R
coil
= 104 Ω
I
loop
Loop current in the circuit:
I
loop
=
This current must always be greater than or
equal to 28mA for proper operation fo the
solenoid valve.
CAUTION
Electrical load must be within the range
stated on the nameplate. Failure to stay
within the electrical range of the coil rating
results in damage to or premature failure of
the coil. It will also invalidate the approval.
SERVICE
To prevent the possibility of personal or
property damage, do not touch the solenoid.
It can become hot under normal operation
conditions. If the solenoid valve is eas-
ily accessible, the installer must provide
protection preventing accidental contact.
To prevent electrostatic hazard, clean coil
surface only with a damp cloth. Do not use
solvents.
MAINTENANCE
Maintenance depends on service condi-
tions. Periodic cleaning is recommended,
the timing of which will depend on the
media and service conditions. During ser-
vicing, components should be examined for
excessive wear. A complete set of internal
parts is available as a spare parts kit. If a
problem occurs during installation/mainte-
nance or in case of doubt please contact
ASCO Numatics or authorize representa-
tives.
CAUTION: Before servicing the solenoid
valve, turn off electrical power, depressurize
valve and vent fluid to a safe area.
Solenoid must be fully reassembled as the
housing and internal parts complete the
magnetic circuit. In case of any replace-
ment of parts by the user, the traceability
of the final product can not be guaranteed
by ASCO Numatics. Wrong assembly will
invalidate the approval.
For additional information visit our inter-
net site: www.asconumatics.eu
IM1050-21B-X-R0 / pg. 1
123620-292X
1. Nut
2. Nameplate, retaining
3. Connector assembly
4. Coil
5. Washer, spring
6. Cartridge assembly
7. O-ring, cartridge
8. O-ring, seat
1. Ecrou
2. Plaque signalétique,
maintien
3. Montage du connecteur
4. Bobine
5. Rondelle élastique, ressort
6. Montage de la cartouche
7. Joint torique, cartouche
8. Joint torique, siège
1. Mutter
2. Typenschild, Halter
3. Gerätesteckdose
4. Magnetspule
5. Federscheibe
6. Einsatzbaugruppe
7. Dichtungsring, Einsatz
8. Dichtungsring, Ventilsitz
1. Dado
2. Targhetta / di tenuta
3. Gruppo connettore
4. Bobina
5. Rondella, molla
6. Gruppo cartuccia
7. Anello di ritenuta, cartuccia
8. Anello di ritenuta, sede
1. Moer
2. Bevestigingstypeplaatje
3. Steker
4. Spoel
5. Veerring
6. Cartridge
7. O-ring, cartridge
8. O-ring, klepzitting
TORQUE CHART
A
B
C
0,6±0,2
20±3
1,1±0,1
5±2
175±25
10±1
ITEMS NEWTON.METRES INCH.POUNDS
3/2 PULL TYPE
TYPE EXTRACTION 3/2
3/2-ZUGAUSFÜHRUNG
TIPO AD ESTRAZIONE 2/2
3/2 TREK
2/2 PULL TYPE
TYPE EXTRACTION 2/2
2/2-ZUGAUSFÜHRUNG
TIPO AD ESTRAZIONE 2/2
2/2 TREK
3/2 PULL TYPE
TYPE EXTRACTION 3/2
3/2-ZUGAUSFÜHRUNG
TIPO AD ESTRAZIONE 2/2
3/2 TREK
2/2 PULL TYPE
TYPE EXTRACTION 2/2
2/2-ZUGAUSFÜHRUNG
TIPO AD ESTRAZIONE 2/2
2/2 TREK
GB
FR
DE
IT
NL
Supplied in spare part kit
Livrées en pochette de rechange
Enthalten im Ersatzteilsatz
Disponibile nel Kit parti di ricambio
Geleverd in vervangingsset
SERIES
ISSC-MXX
/