Festo Стандартные распределители по NAMUR - Manual (Page 2)

Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
en Detailed specifications on the product and the inten-
ded accessories, the assembly instructions as well as
the conformity declaration can be found in Internet:
www.festo.com
MD-3/2-24DC-PI-IA-EX
546022
U i : 28V DC I i : 115mA
C i : ~0nF L i : ~0nH
Pi: 1,6W
PTB 09 ATEX 2043
II 2G Ex ia IIC T6 X
II 2D Ex tD A21 IP65
T80°C X
-20°C≤Ta≤+50°C
D-73734
0344 Esslingen
Product identification
Solenoid valve
Example of manufacturing period = August 2010
Basic valves VSNB
Manufacturing year
R = 2003 S = 2004 T = 2005 U = 2006 V = 2007 W = 2008
X = 2009 A = 2010 B = 2011 C = 2012 D = 2013 E = ...
Manufacturing month
1 January
2 February
3 March
4 April
5 May
6 June
7 July
8 August
9 September
O October
N November
D December
Solenoid coils intrinsically safe en . . . . . . . . . . . . . . . . .
1 Permitted solenoid coil
Voltage Typ Part no.
24 V DC MD-3/2-24DC-PI-IA-EX 546 022
2 Function
When power is switched on, the solenoid is energised and
the pilot valve actuated. A small volume of pilot air switches
the solenoid valve. A socket is included for electrical connec-
tion.
3 Application
• The solenoid coil has been designed as an actuator for
Festo valves.
• The magnetic coils can be used in combination with the
planned magnetic valves and the included socket in zones
1 and 2 of potentially explosive gas atmospheres and in
zones 21 and 22 of potentially explosive dust atmosphe-
res.
Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If labelled with X: special conditions
• Ambient temperature: -20 °C ≤ Ta ≤ +50 °C
• At ambient temperatures -20 °C ≤ Ta ≤ +85 °C
II 2G Ex ia IIC T4
II 2D Ex tD A21 IP65 T130°C
• Electrical connections in potentially explosive dust atmosp-
heres must be made using the accompanying appliance
socket with mounting screw.
• In potentially explosive gas atmospheres, electrical con-
nection can also be made using solder and plug connec-
tions for push-in sleeves 6,3 in accordance with
DIN 46247-3.
4 Transport and storage
• Ensure storage conditions as follows: Short storage pe-
riods in cool, dry, shaded and corrosion-protected loca-
tions.
5 Conditions of use
• Comply with applicable national and international guideli-
nes.
• Note the maximum permitted values and operating condi-
tions.
• Take into account the ambient conditions at the site.
Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fitting and commissioning to be carried out only by quali-
fied electrotechnicians in accordance with the operating
instructions.
• Use the product in its original condition without underta-
king any modifications. Tampering with the device by an-
ybody except the manufacturer will render the EU test cer-
tificate invalid.
• The device must be connected to a certified intrinsically
safe current circuit Ex ia IIC or Ex ib IIC.
• When switched with appropriate operating media, proof
must be carried out of the intrinsic safety.
• Perform installation, commissioning, maintenance and
disassembly only outside potentially explosive areas.
• Use only the approved solenoid valves.
6 Installation
• Follow the operating conditions and information in the
installation instructions for the solenoid valves.
• Connect the device to equipment of ignition protection
type [Ex ia] IIC or [Ex ib] IIC.
• Make sure that the connections and the tubing lines of the
solenoid valve are free of dirt particles or foreign matter.
5
1
2
3
Fig. 1
4
1 Pilot control exhaust port
2 Knurled nut
3 Solenoid body
4 Connection for cable with socket
5 Device socket
6 Fastening screw
7 CNOMO Sub-base
8 Basic valve VSNB
7
6
8
1. Connect the plug socket with cable (see 4 ).
To do this, mount the cable connector with sealing ring and
washer to the housing.
2. Plug the socket into the housing.
3. Place the seal onto the plug.
4. Plug in the device socket 5and tighten the fastening
screw 6.
Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The following combinations of solenoid coil and solenoid
valve are in the form of a pre-fitted component.
Preassembled module Part
no.
VSNB-FC-M52-MH-G14-1A1-EX4A 547019
VSNB-F-M52-MH-G14-1A1-EX4A 547023
VSNB-F-B52-H-G14-1A1-EX4A 547024
7 Commissioning
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The discharge of electrostatically charged parts can lead
to sparks which can cause an explosion.
• Prevent electrostatic discharges by means of suitable
installation and cleaning measures.
• Include the device in the system’s potential equalisa-
tion.
• Include the drive in the potential equalisation. The
mounting screws ensure there is an electrically conduc-
tive contact between basic valve and drive.
• Prevent all charge-producing processes that are stron-
ger than manual rubbing of surfaces.
Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air flowing out can swirl up dust and create a potentially
explosive atmosphere.
• Remove the exhaust air from the potentially explosive
atmosphere via tubing lines (see 1 in Fig. 1).
• Observe the specifications on the type plate.
• Do not commission the solenoid coil until it has been fit-
ted .
Fig. 2
Connection diagram II
(2
)
G
[E
x
ib
]II
C
DC
Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Plan the size of the intrinsically safe current circuit ta-
king into account the maximum permissible electrical
values (Technical specifications).
• Always suction the operating medium outside the poten-
tially explosive area.
8 Operation
• Observe the operating conditions.
• Always observe the maximum permitted limits.
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hot surfaces can cause injury.
The temperature on the surface of the solenoid coil hou-
sing can amount to 80°C.
• Do not touch the housing.
• Prevent unintended actuation through suitable measures.
• Protect the device against fluids and corrosive media.
• Protect the device against twisting and bending.
To avoid short circuits and interruptions:
• Prevent kinking of connecting cables and stranded wires.
9 Disassembly
1. Ensure that all components which are pressurized by the
valve have assumed a position which is also stable after
venting.
2. Vent the line to which the valve is connected.
3. Switch off the power supply.
4. Undo the fastening screw 6 on the appliance socket and
pull off the appliance socket 5.
5. Loosen the plug socket with cable.
10 Accessories
Accessories taken into account Part
no.
Basic valve VSNB-FC-M52-M-G14-P2
VSNB-F-M52-M-G14-P2
VSNB-F-B52-G14-P2 547017
547021
547022
Socket MD-3/2-24DC-PI-IA-EX 747856
11 Service and maintenance
• Modifications and repairs to the solenoid coil are not per-
mitted.
• The solenoid coil does not require maintenance if used in
accordance with the operating instructions.
12 Technical specifications
Operating conditions
Power supply Only from certified intrinsically
safe circuits Ex ia IIC or Ex ib IIC
Maximum permissible electrical values
Max. input voltage U i 28 V DC
Max. input current I i 115 mA
Max. Power (performance) P i 1,6 W
Effective inner inductivity L i L 0 μH
Effective inner capacity C i L 0 nF
Resistance R 20 400 Ω + 8%
Nominal voltage U N 24V DC (21,6 ... 28 V DC)
Minimum switching current 27 mA
Duty cycle 100% (Continuous operation)
Protection class IP65 as per EN 60529
Pneumatic data
Max. operating pressure 8 bar
Operating medium Filtered compressed air, grade of
filtration 40 μm, unoiled
Pneumatic connection CNOMO 30 mm
Exhaust port (internal armature
tube) M5 x 5
Thermal data
Temperature class with ambient temperature Ta
–20 ≤ Ta ≤ +50 °C T6, T80 °C
–20 ≤ Ta ≤ +85 °C T4, T130 °C
Max. Medium temperature +70 °C
Storage temperature –20 ... +80 °C
General technical data
Mounting position as desired
Tightening torque
Plug socket mounting screw max. 0,4 Nm ± 0,1 Nm
Cable screw connector max. 1,8 Nm ± 0,2 Nm
(en) Operating instructions
Original: de
Festo AG & Co. KG
Postfach
D-73726 Esslingen
Phone:
+49/711/347-0
www.festo.com
1003NH 704 020
MD-3/2-24DC-PI-IA-EX
MD-3/2-24DC-PI-IA-EX
PTB 09 ATEX 2043
II 2 G Ex ia IIC T6 X
II 2 D Ex tD A21 IP65 T80°C X