Festo VACC-S18-35-K4-1U-EX4ME, VACC-S18-120-K4-2U-EX4ME, VACC-S18-35-K4-3U-EX4ME, VACC-S18-120-K4-27-EX4ME, VACC-S18-120-K4-3U-EX4ME Operating Instructions Manual
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Solenoid coil
VACC-S18-…-K4-…-EX4ME
II 2G Ex emb II T6, T5, T4
II 2D Ex tD A21 IP65 T80 °C, T95 °C, T130 °C
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
Operating instructions
(Original instructions)
8073493
2017-10d
[8073495]
Solenoid coil VACC-S18-…-K4-…-EX4ME English...........................
1 Further applicable documents
– Certification documents
– VOFC/VOFD assembly instructions
For all available product documentation è www.festo.com/pk
2 Certified solenoid coils
Voltage Type Part no.
24 V DC/AC VACC-S18-35-K4-1U-EX4ME 562897
110 V DC/AC VACC-S18-35-K4-2U-EX4ME 562898
230 V DC/AC VACC-S18-35-K4-3U-EX4ME 562899
24 V DC/AC VACC-S18-120-K4-1U-EX4ME 3536527
110 V DC/AC VACC-S18-120-K4-2U-EX4ME 3536565
230 V DC/AC VACC-S18-120-K4-3U-EX4ME 3535568
60 DC VACC-S18-120-K4-27-EX4ME 3536569
48 DC VACC-S18-120-K4-7-EX4ME 3536573
24 V DC/AC VACC-S18-35-K4-1UF-EX4ME 570785
24 V DC/AC VACC-S18-120-K4-1UF-EX4ME 3535840
Fig. 1
3 Function
When switching on the voltage, the solenoid is energised and the valve is actuated.
A built-in bridge rectifier or a built-in varistor limits the switch-off overvoltage.
4 Application
The solenoid coil is intended to be used as an actuator for solenoid valves.
The solenoid coils can be used in combination with the specified solenoid valves
from Festo in zones 1 and 2 for potentially explosive gas atmospheres and in
zones 21 and 22 for potentially explosive dust atmospheres.
The suitability of other solenoid valves can only be determined in connection
with the assessment of further components of the subsystem. These must
achieve the same safety level.
Note
Label X: special conditions
Operate the solenoid coils (except variants -1UF-) only with upstream fuses.
è Technical data and product label
Protect connecting cables that contain silicone or are not crack-resistant
against mechanical damage.
Protect the device from all mechanical damage.
For solenoid coils in direct current design -7- and -27-, the maximum permiss
ible ripple is 20 %.
Note
When using Festo solenoid valves:
Operate the solenoid valve only with compressed air or neutral gases.
The device is not intended to be used with other fluids.
Always draw in the operating medium outside the potentially explosive area.
Use only solenoid valves approved for potentially explosive areas.
5 Requirements for product use
Comply with all applicable national and international regulations.
Installation and commissioning should only be carried out by qualified electrical
specialists.
Use the device in its original status, without any unauthorised modifications.
The certification is no longer valid if the device is altered in any way by anyone
other than the manufacturer.
6 Commissioning
Observe the product labelling.
Operate solenoid coils only with upstream fuses (except variants -1UF-).
Do not commission the solenoid coil until after mounting.
Warning
The discharge of electrostatically charged parts can lead to ignitable sparks.
Prevent electrostatic discharge by taking appropriate installation and cleaning
measures.
Include the device in the system’s potential equalisation. The surface coating
of the Festo solenoid valves (VOFD-…) is electrically non-conductive.
Prevent charge-generating processes that are stronger than manual rubbing
of surfaces.
Do not mount the housing of the solenoid coils in an area of pneumatically
conveyed dusts (e.g. powder jet).
Note
Escaping exhaust air can swirl up dust and create an explosive dust atmosphere.
Block circuit diagrams
VACC-S18-…-K4-1UF-EX4ME
DC / AC
X
VACC-S18-…U-EX4ME
DC / AC
IEC 60127-2-1
X
VACC-S18-…7-EX4ME
DC
IEC 60127-2-1
7 Operation
Observe the operating conditions.
Comply with permissible limit values è Technical data.
Note
Risk of injury from hot surfaces.
The surfaces on the housing of the solenoid coil can get hot.
Do not touch the housing.
8 Maintenance and care
Note
The discharge of electrostatically charged parts can lead to ignitable sparks.
If used in group IIC:
Only clean the device with a damp cloth.
Changes or repairs to the solenoid coil are not permitted.
The device is maintenance-free.
9 Certifications
Region/country Certificate no.
Europe PTB 08 ATEX 2033 X
Brazil TÜV12.1946 X
China NEPSI GYJ 17.1237X
Korea KGS16-GA4BO-0755X
KGS16-GA4BO-0756X
Fig. 2
10 Technical data
35-1U 35-2U 35-3U 35-1UF 120-1UF
Nominal voltage U
N
(–15 % / +10 %)
V DC/AC24 110 230 24 24
Type of voltage Hz Alternating voltage (50 … 60)
DC / undulating voltage
Nominal power W/VA 3.5 12
Duty cycle 100 % (continuous operation)
Degree of protection IP65 / 67 in accordance with FN 942017-2
Overvoltage category III in accordance with EN 60664-1
Fuse connected
upstream
in accordance with
IEC 60127
mA 250 63 32
Interruption rating
Fuse
A Normally ≥ 1500 35
Limitation
of switch-off
overvoltage
(internal)
Bridge rectifier
Resistance R
20
Ω 158 3250 13200 158 42.1
Current consumption
I
20
mA 143 33 17 143 524
Temperature class at ambient temperature T
a
–20 Ta +40 °C T4/T130°C
–20 Ta +50 °C T6/T80°C T6/T80°C T6/T80°C T6/T80°C
–20 Ta +60 °C T5/T95°C T5/T95°C T5/T95°C T5/T95°C
Storage temperature °C 20 … +90
Relative humidity 95 % (non-condensing)
Connecting cables
Conductor
cross-section
mm20.75 … 2.5
Cable diameter mm 6 … 12
Cable entry
thread K4
M20 x 1.5
External earth
terminal
mm24
Materials
Housing Steel
Cover
Terminal housing
Steel, PA
Assembly Individual mounting
Installation position Optional
120-1U120-2U120-3U120-27120-
7
Nominal voltage U
N
(–15 % / +10 %)
24 V
DC/AC
110 V
DC/AC
230 V
DC/AC
60
DC
48
DC
Type of voltage Hz Alternating voltage (50 … 60)
DC / undulating voltage
Direct voltage
Max. permitted ripple % 20
Nominal power W/VA 12
Duty cycle 100 % (continuous operation)
Degree of protection IP65 / 67 in accordance with FN 942017-2
Overvoltage category III in accordance with EN 60664-1
Fuse connected upstream in
accordance with IEC 60127
mA 1250 315 125 500 630
Interruption rating
Fuse
A Normally ≥ 1500
Limitation of switch-off over
voltage (internal)
Bridge rectifier Varistor
Resistance R
20
Ω 42.1 902 3690 266 173
Current consumption I
20
mA 524 120 62 226 277
Temperature class at ambient temperature T
a
–20 Ta +40 °C T4/
T130°C
T4/
T130°C
T4/
T130°C
T4/
T130°C
T4/
T130°C
Storage temperature °C 20 … +90
Relative humidity 95 % (non-condensing)
Connecting cables
Conductor cross-section mm20.75 … 2.5
Cable diameter mm 6 … 12
Cable entry thread K4 M20 x 1.5
External earth terminal mm24
Materials
Housing Steel
Cover, terminal housing Steel, PA
Assembly Individual mounting
Installation position Optional
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