Burkert 8690 User Manual [en, de, fr]
Type 8690
Pneumatic Control Unit
Pneumatische Ansteuerung
Unité de commande pneumatique
Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© 2008 - 2013 Bürkert Werke GmbH
Operating Instructions 1311/06_EU-ml_00805640 / Original DE
Type 8690
Pneumatic Control Unit Type 8690
1 OPERATING INSTRUCTIONS ................................................................5
1.1 Symbols .......................................................................................5
1.2 Definition of term / abbreviation .............................................5
2 AUTHORIZED USE ......................................................................................6
2.1 Restrictions .................................................................................6
3 BASIC SAFETY INSTRUCTIONS ..........................................................6
4 GENERAL INFORMATION ........................................................................8
4.1 Contact addresse ...................................................................... 8
4.2 Warranty ......................................................................................8
4.3 Trademarks ..................................................................................8
4.4 Information on the internet ......................................................8
5 DESCRIPTION OF SYSTEM ....................................................................9
5.1 Configuration and function ...................................................... 9
6 TECHNICAL DATA .....................................................................................10
6.1 Conformity .................................................................................10
6.2 Standards ..................................................................................10
6.3 Operating conditions ..............................................................10
6.4 Mechanical data.......................................................................10
6.5 Pneumatic data ........................................................................11
6.6 Electrical data ...........................................................................11
6.7 Type label (example) ...............................................................11
7 INSTALLATION ............................................................................................ 12
7.1 Safety instructions ...................................................................12
7.2 Installation of the Pneumatic Control Unit Type 8690
on process valves of series 21xx .........................................12
7.3 Installation of the Pneumatic Control Unit Type 8690
on process valves of series 20xx .........................................15
7.4 Rotating the actuator module ...............................................18
7.5 Rotating the Pneumatic Control Unit for process valves
belonging to series 20xx ........................................................19
8 PNEUMATIC INSTALLATION ...............................................................20
9 ELECTRICAL INSTALLATION ............................................................... 21
9.1 Safety instructions ...................................................................21
9.2 Electrical installation with cable gland ................................22
9.3 Elektrical installation with circular plug-in connector ......24
9.4 Adjustment of the micro switch or the proximity
switches (option) .....................................................................26
10 MAINTENANCE ........................................................................................... 27
10.1 Service at the air intake filter.................................................27
11 ACCESSORIES ........................................................................................... 28
12 SAFETY POSITIONS .............................................................................. 28
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3
13 DISASSEMBLY ............................................................................................29
13.1 Safety instructions ...................................................................29
13.2 Disassembly the Pneumatic Control Unit ..........................29
14 PACKAGING, TRANSPORT, STORAGE ..........................................30
Type 8690
4
english
Type 8690
Operating Instructions
1 OPERATING INSTRUCTIONS
The operating instructions describes the entire life cycle of the device.
Keep these instructions in a location which is easily accessible to
every user, and make these instructions available to every new owner
of the device.
Important safety information.
Read the operating instructions carefully and thoroughly. Study
in particular the chapters entitled “Basic safety instructions” and
“Authorized use”.
▶ The operating instructions must be read and understood.
1.1 Symbols
DANGER!
Warns of an immediate danger.
▶ Failure to observe the warning will result in a fatal or serious injury.
WARNING!
Warns of a potentially dangerous situation.
▶ Failure to observe the warning may result in serious injuries or
death.
CAUTION!
Warns of a possible danger.
▶ Failure to observe this warning may result in a moderate or
minor injury.
NOTE!
Warns of damage to property.
▶ Failure to observe the warning may result in damage to the
device or the equipment.
Indicates important additional information, tips and
recommendations.
refers to information in these operating instructions or in
other documentation.
▶ Designates an instruction to prevent risks.
→ Designates a procedure which you must carry out.
1.2 Definition of term / abbreviation
The term “device” used in these instructions always stands for the
Pneumatic Control Unit Type 8690.
In these instructions, the abbreviation “Ex” always refers to “potentially explosive”.
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5
Type 8690
Authorized use
2 AUTHORIZED USE
Non-authorized use of the Pneumatic Control Unit Type
8690 may be a hazard to people, nearby equipment and the
environment.
The device is designed to be mounted on pneumatic actuators of
process valves for the control of media.
▶ Do not expose the device to direct sunlight.
▶ Use according to the authorized data, operating conditions and
conditions of use specified in the contract documents and operating instructions. These are described in the chapter entitled “6
Technical data”.
▶ The device may be used only in conjunction with third-party devices
and components recommended and authorized by Bürkert.
▶ In view of the large number of options for use, before installation, it
is essential to study and if necessary to test whether the Pneumatic
Control Unit is suitable for the actual use planned.
▶ Correct transportation, correct storage and installation and care-
ful use and maintenance are essential for reliable and faultless
operation.
▶ Use the Pneumatic Control Unit Type 8690 only as intended.
2.1 Restrictions
If exporting the system/device, observe any existing restrictions.
3 BASIC SAFETY
INSTRUCTIONS
These safety instructions do not make allowance for any
• contingencies and events which may arise during the installation,
operation and maintenance of the devices.
• local safety regulations, whereby the operator is responsible for their
compliance, by the installation personnel too.
DANGER!
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
Risk of electric shock.
▶ Before working on equipment or device, switch off the power
supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations
for electrical equipment.
6
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Type 8690
Basic safety instructions
General hazardous situations.
To prevent injury, ensure:
▶ In the potentially explosion-risk area the Pneumatic Control Unit
Type 8690 may be used only according to the specification on the
separate approval sticker. For use observe the additional instructions enclosed with the device together with safety instructions
for the explosion-risk area.
▶ Devices without a separate approval sticker may not be used in a
potentially explosive area.
▶ that the system cannot be activated unintentionally.
▶ Installation and repair work may be carried out by authorized
technicians only and with the appropriate tools.
▶ After an interruption in the power supply or pneumatic supply,
ensure that the process is restarted in a defined or controlled
manner.
▶ The device may be operated only when in perfect condition and
in consideration of the operating instructions.
▶ The general rules of technology apply to application planning and
operation of the device.
To prevent damage to property of the device, ensure:
▶ Do not feed any aggressive or flammable media into the pilot air
port.
▶ Do not feed any liquids into the pilot air port.
▶ When unscrewing and screwing in the transparent cap, do not
hold the actuator of the process valve but the connection housing
of Type 8690.
▶ Do not put any loads on the housing (e.g. by placing objects on
it or standing on it).
▶ Do not make any external modifications to the device housings.
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7
Type 8690
General information
4 GENERAL INFORMATION
4.1 Contact addresse
Germany
Bürkert Fluid Control Systems
Sales Center
Chr.-Bürkert-Str. 13-17
D-74653 Ingelfingen
Tel. : 07940 - 10 91 111
Fax: 07940 - 10 91 448
E-mail: info@de.burkert.com
International
Contact addresses are found on the final pages of the printed operating manual.
You can also find information on the Internet under:
www.burkert.com
4.2 Warranty
The warranty is only valid if the device is used as authorized in accordance with the specified application conditions.
4.3 Trademarks
Brands and trademarks listed below are trademarks of the corresponding companies / associations / organizations
Loctite Henkel Loctite Deutschland GmbH
4.4 Information on the internet
The operating instructions and data sheets for Type 8690 can be found
on the Internet at:
www.burkert.com
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Type 8690
Description of system
5 DESCRIPTION OF SYSTEM
5.1 Configuration and function
The Pneumatic Control Unit Type 8690 can control single or doubleacting process valves.
The Pneumatic Control Unit Type 8690 has been optimized for
integrated, modular installation on process valves of the 21xx series.
The module configuration permits a variety of expansion steps.
For installation on the 20xx series there is a special model which is
described in Chapter “5.1.2”.
5.1.1 Pneumatic Control Unit for integrated
installation on 21xx series
Transparent cap
Connection housing
Pilot air port
label: 1
Exhaust air port
label: 3
Pressure limiting valve
(for protection against
too high internal pressure
Cable gland M16 x 1.5 or
Circular plug-in connector M12 x 1
Fig. 1: Configuration and function (1)
in case of error)
Optical position indicator:
The device status is displayed on the pneumatic control unit (yellow
mark).
Option: Electrical position feedback
Optionally mechanical limit switches (micro switches) or inductive limit
switches (proximity switches) can measure the valve position.
View without transparent cap:
Screw for adjustment
of the lower micro
switch or the lower
proximity switch
Optical position indicator (yellow mark)
Screw for adjustment
of the upper proximity
switch
Screw terminals
Pilot valve (3/2-way
or 5/2-way solenoid
valve with hand lever)
Air intake filter (exchangeable)
Fig. 2: Configuration and function (2)
Fastening screws (2x)
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9
Type 8690
Description of system
5.1.2 Model for control of process valves
belonging to the 20xx series
A special model enables the Pneumatic Control Unit Type 8690 to be
attached to process valves belonging to the 20xx series.
This model has a different connection housing so that the pilot air ports
can be connected to the outside of the actuator.
Pilot air outlet 2
Pilot air outlet 2
Fastening screws (2 x)
Fig. 3: Model for process valves, 20xx series
1
2
6 TECHNICAL DATA
6.1 Conformity
In accordance with the EC Declaration of conformity, the Pneumatic
Control Unit Type 8690 is compliant with the EC Directives.
6.2 Standards
The applied standards on the basis of which compliance with the EC
Directives is confirmed are listed in the EC type examination certificate
and/or the EC Declaration of Conformity.
6.3 Operating conditions
WARNING!
Solar radiation and temperature fluctuations may cause malfunctions or leaks.
▶ If the device is used outdoors, do not expose it unprotected to
the weather conditions.
▶ Ensure that the permitted ambient temperature does not exceed
the maximum value or drop below the minimum value.
Ambient temperature: see type label
Degree of protection: IP65 / IP67 according to EN 60529
(only if cables, plugs and sockets have
been connected correctly and in compliance with the exhaust air concept in
chapter “8 Pneumatic installation”).
6.4 Mechanical data
Dimensions: see data sheet
Housing material external PPS, PC
Sealing material external EPDM
internal NBR
Stroke range of valve spindle Micro switch 7 – 28 mm
Proximity switch 2 – 28 mm
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Type 8690
Description of system
6.5 Pneumatic data
Control medium neutral gases, air, Quality classes in accordance
with DIN ISO 8573-1
Dust content Class 5 max. particle size 40 μm,
max. particle density 10 mg/m
3
Water content Class 3 max. pressure dew point -20 °C or
min. 10 °C below the lowest operating
temperature
Oil content Class 5 max. 25 mg/m
3
Temperature range -10 to +50 °C
Pressure range 3 to 7 bar
Air output of pilot valve 250 I
/min
N
(for aeration and deaeration, QNn-value
according to definition for pressure
drop from 7 to 6 bar absolute)
Connections Plug-in hose connector ∅6 mm / ¼”
Socket connection G 1/8
6.6 Electrical data
Connections: Cable gland M16 x 1.5, wrench size 22
(clamping area 5 – 10 mm)
with screw terminals
for cable cross-sections 0.14 – 1.5 mm²
Circular plug-in connector M12 x 1, 8-pole
Supply voltage
Pilot valve 24 V DC ± 10 %, residual ripple 10 %
Micro switch 24 V DC max. 2 A
Proximity switches 24 V DC max. 100 mA per proximity switch
Power consumption of pilot valve: 1 W
Position feedback
(option): 1 or 2x Micro switch (24 V DC)
1 or 2x Proximity switch (24 V DC),
normally open PNP
1 or 2x Proximity switch NAMUR (8 V DC)
6.7 Type label (example)
Supply voltage / Control
Type
8690 24 V/DC
single act Pilot 0,6
Pmax 7 bar 2 sw.mec.
Tamb 0°C - +55°C
S/N 001000
00185114
D-74653 Ingelfingen
CE
W14UN
Fig. 4: Example of type label
Control function - pilot valve
Max. operating pressure limit switch
Ambient temperature
Serial number - CE mark
Bar code
Identification number
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11
Type 8690
Installation
7 INSTALLATION
Only for Pneumatic Control Unit without pre-assembled
process valve.
7.1 Safety instructions
DANGER!
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
Risk of electric shock.
▶ Before working on equipment or device, switch off the power
supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations
for electrical equipment.
WARNING!
Risk of injury from improper installation.
▶ Installation may be carried out by authorized technicians only
and with the appropriate tools.
Risk of injury from unintentional activation of the system and
an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following installation, ensure a controlled restart.
7.2 Installation of the Pneumatic
Control Unit Type 8690 on
process valves of series 21xx
Procedure:
1. Install switch spindle:
Transparent cap
Pilot air ports
(plug-in hose con-
nectors with collets or
threaded bushings)
Actuator
Fig. 5: Installation of the switch spindle (1), 21xx series
→ Unscrew the transparent cap on the actuator and unscrew the
position display (yellow cap) on the spindle extension.
→ For model with plug-in hose connector, remove the collets (white
nozzles) from both control air connections (if present).
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Type 8690
Installation
Switch cam
10
Fig. 6: Installation of switch spindle (2), 21xx series
NOTE!
Improper installation may damage the groove ring in the
guide element.
The groove ring is already be pre-assembled in the guide element
and must be “locked into position” in the undercut.
▶ When installing the switch spindle, do not damage the groove ring.
Switch spindle
Guide element
Groove ring
max. 1 Nm
max. 5 Nm
Actuator cover
O-ring
Spindle extension
→ Push the switch spindle through the guide element.
NOTE!
Screw locking paint may contaminate the groove ring.
▶ Do not apply any screw locking paint to the switch spindle.
→ To secure the switch spindle, apply some screw locking paint
(Loctite 290) in the tapped bore of the spindle extension in the
actuator.
→ Check that the O-ring is correctly positioned.
→ Screw the central screw to the actuator cover (maximum torque:
5 Nm).
→ Screw switch spindle onto the spindle extension. To do this,
there is a slot on the upper side (maximum torque: 1 Nm).
→ Position the switch cam on the switch spindle so that the distance
between the switch cam and top of the spindle is 10 mm (see
“Fig. 6”)
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13
Type 8690
Installation
2. Install sealing rings
Form seal
Pilot air ports
Caution:
Collets must not be
fitted !
Fig. 7: Installing of the sealing rings, 21xx series
Installation of
the form seal
→ Pull the form seal onto the actuator cover (smaller diameter
points upwards).
→ Check that the O-rings are correctly positioned in the control air
connections.
When the Pneumatic Control Unit is being installed, the collets
of the pilot air ports must not be fitted to the actuator.
3. Installation of the Pneumatic Control Unit:
Connection
pieces
Pilot air
ports
Fig. 8: Installation of the Pneumatic Control Unit, 21xx series
Fastening
screws
max. 0,5 Nm
→ Align the Pneumatic Control Unit until the connection pieces
of the Pneumatic Control Unit can be inserted into the pilot air
ports of the actuator (see also “Fig. 8”).
→ Push the Pneumatic Control Unit, without turning it, onto the
actuator until no gap is visible on the form seal.
NOTE!
Too high torque when screwing in the fastening screw does
not ensure degree of protection IP65 / IP67.
▶ The fastening screws may be tightened to a maximum torque of
0.5 Nm only.
→ Attach the Pneumatic Control Unit to the actuator using the two
side fastening screws. In doing so, tighten the screws only handtight (max. torque: 0.5 Nm).
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Type 8690
Installation
7.3 Installation of the Pneumatic
Control Unit Type 8690 on
process valves of series 20xx
Procedure:
1. Install switch spindle
Transparent cap
Position indicator
Actuator
Fig. 9: Installation of the switch spindle (1), series 20xx
→ Unscrew the transparent cap on the actuator.
→ Using a hexagon socket key, unscrew the orange/yellow position
indicator from the inside of the actuator.
→ Press the O-ring downwards into the cover of the actuator (see
“Fig. 10”).
10 mm
Fig. 10: Installation of the switch spindle (2), series 20xx
Switch cam
Switch spindle
Guide element
O-ring
Plastic part of the
switch spindle
Spindle (actuator)
→ Manually screw the switch spindle (and the plugged-on guide
element) together with the plastic part onto the spindle of the
actuator, but do not tighten spindle yet.
→ Tighten the guide element with a face wrench
cover (torque: 8.0 Nm).
1)
into the actuator
→ Tighten the switch spindle on the spindle of the actuator. To do
this, there is a slot on the upper side (torque: 1.0 Nm).
→ Position the switch cam on the switch spindle so that the distance
between the switch cam and top of the spindle is 10 mm (see “Fig.
10”).
1) journal Ø: 3 mm; journal gap: 23.5 mm
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15
Type 8690
Installation
2. Installation of the cover ring and
the Pneumatic Control Unit:
Cover ring
Fig. 11: Installation of the cover ring and the Pneumatic Control
Unit, series 20xx
Fastening screws
max. 0.5 Nm
→ Pull the cover ring onto the actuator cover
(for actuator sizes ∅ 50 and ∅ 63 only).
→ Push the Pneumatic Control Unit onto the actuator.
→ Press the Pneumatic Control Unit all the way down as far as the
actuator and turn it into the required position.
Ensure that the pneumatic connections of the Pneumatic
Control Unit and those of the actuator are situated preferably vertically one above the other (see “Fig. 11”).
If they are positioned differently, longer hoses may be
required other than those supplied in the accessory kit.
NOTE!
Too high torque when screwing in the fastening screw does
not ensure degree of protection IP65 / IP67.
▶ The fastening screws may be tightened to a maximum torque of
0.5 Nm only.
→ Attach the Pneumatic Control Unit to the actuator using the two
side fastening screws. In doing so, tighten the fastening screws
hand-tight only (max. torque: 0.5 Nm).
3. Installation of the pneumatic connection on the actuator
Pilot air outlet 2
Pilot air outlet 2
Upper pilot air port
Lower pilot air port
Fig. 12: Installation of the pneumatic connection, 20xx series
1
2
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Type 8690
Installation
→ Screw the plug-in hose connectors onto the Pneumatic Control
Unit and the actuator.
→ Using the hoses supplied in the accessory kit, make the con-
nection between the Pneumatic Control Unit and the actuator
with the following “Tab. 1: Pneumatic connection to actuator”.
NOTE!
Damage or malfunction due to ingress of dirt and moisture.
▶ To comply with degree of protection IP65 / IP67, connect the
pilot air aoutlet which is not required to the free pilot air port of
the actuator or seal with a plug.
“In rest position” means that the pilot valves of the Pneumatic Control Unit Type 8690 are isolated or not actuated.
If the ambient air is humid, a hose can be connected between
pilot air outlet 22 of the Pneumatic Control Unit and the
unconnected pilot air port of the actuator for control function
A or control function B. As a result, the spring chamber of
the actuator is supplied with dry air from the vent duct of the
Pneumatic Control Unit.
Control function Pneumatic connection Type 8690
with actuator
Process valve closed
in rest position
A
(by spring force)
Pilot air outlet
Type 8690
2
1
2
2
Pilot air port
actuator
lower pilot air port
of the actuator
should be connected to the
upper pilot air port
of the actuator
upper pilot air port
of the actuator
should be connected to the
lower pilot air port
Process valve open
in rest position
B
(by spring force)
2
1
2
2
of the actuator
lower pilot air port
of the actuator
upper pilot air port
of the actuator
upper pilot air port
of the actuator
lower pilot air port
of the actuator
Process valve closed
in rest position
I
Process valve open
in rest position
2
1
2
2
2
1
2
2
Tab. 1: Pneumatic connection to actuator
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17
7.4 Rotating the actuator module
The actuator module (Pneumatic Control Unit and actuator)
can be rotated for straight seat valves and angle seat valves
only.
The position of the connections can be aligned steplessly by rotating the
actuator module (Pneumatic Control Unit and actuator) through 360°.
Process valves Type 2100 and 2100: Only the entire actuator
module can be rotated. The Pneumatic Control Unit cannot
be rotated contrary to the actuator.
The process valve must be in the open position for alignment
of the actuator module.
DANGER!
Type 8690
Installation
Actuator
module
Key contour
Nipple
Fig. 13: Rotating the actuator module
Hexagon
Nipple
with hexagonwithout hexagon
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
Procedure:
→ Clamp valve body in a holding device (only required if the process
valve has not yet been installed).
→ Control function A: Open process valve.
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→ Using a suitable open-end wrench, counter the wrench flat on
the pipe.
→ Actuator module without hexagon:
Fit special key2) exactly in the key contour on the underside of
the actuator.
→ Actuator module with hexagon:
Place suitable open-end wrench on the hexagon of the actuator.
2) The special key (665702) is available from your Bürkert sales office.
Type 8690
Installation
WARNING!
Risk of injury from discharge of medium and pressure.
If the direction of rotation is wrong, the body interface may
become detached.
▶ Rotate the actuator module in the specified direction only (see
“Fig. 14”).
→ Actuator module without hexagon:
Rotate clockwise (as seen from below) to bring the actuator
module into the required position.
→ Actuator module with hexagon:
Rotate counter-clockwise (as seen from below) to bring the
actuator module into the required position.
Open-end wrench
Special key
with hexagon
without hexagon
Fig. 14: Rotating with special key / open-end wrench
7.5 Rotating the Pneumatic
Control Unit for process valves
belonging to series 20xx
If the connecting cables or hoses cannot be fitted properly following
installation of the process valve, the Pneumatic Control Unit can be
rotated contrary to the actuator.
Fastening
screw (2x)
Pneumatic
connection
Fig. 15: Rotating the Pneumatic Control Unit, series 20xx
Pneumatic
Control Unit
Actuator
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19
Type 8690
Pneumatic installation
Procedure
→ Loosen the pneumatic connection between the Pneumatic
Control Unit and the actuator.
→ Loosen the fastening screws (hexagon socket wrench size 2.5).
→ Rotate the Pneumatic Control Unit into the required position.
NOTE!
Too high torque when screwing in the fastening screw does
not ensure degree of protection IP65 / IP67.
▶ The fastening screw may be tightened to a maximum torque of
0.5 Nm only.
→ Tighten the fastening screws hand-tight only (maximum torque:
0.5 Nm).
→ Re-attach the pneumatic connections between the Pneumatic
Control Unit and the actuator. If required, use longer hoses.
8 PNEUMATIC INSTALLATION
DANGER!
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
Procedure:
→ Connect the control medium to the pilot air port (1)
(3 to 7 bar, oil, water and dust-free instrument air).
→ Attach the exhaust airline or a silencer to the exhaust air con-
nection (3).
Important information for the problem-free functioning of the
device:
▶ The installation must not cause back pressure to build up.
▶ Select a hose for the connection with an adequate cross-section.
▶ The exhaust air line must be designed in such a way that no water
or other liquid can get into the device through the exhaust air
connection.
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Type 8690
Electrical installation
Pilot air port
label: 1
9 ELECTRICAL INSTALLATION
Two kinds of connections are used for the electrical bonding of the
Pneumatic Control Unit:
• Cable gland
with cable gland M16 x 1.5 and screw terminals
• Multi-pole
with circular plug-in connector M12 x 1, 8-pole.
Exhaust air
connection
label: 3
Fig. 16: Pneumatic connection
Caution: (Exhaust air concept):
In compliance with degree of protection IP67, an exhaust air
line must be installed in the dry area.
Keep the adjacent supply pressure always at least 0.5 –
1 bar above the pressure which is required to move the
actuator to its end position.
9.1 Safety instructions
DANGER!
Risk of electric shock.
▶ Before working on equipment or device, switch off the power
supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations
for electrical equipment.
WARNING!
Risk of injury from improper installation.
▶ Installation may be carried out by authorized technicians only
and with the appropriate tools.
Risk of injury from unintentional activation of the system and
an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following installation, ensure a controlled restart.
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21
Type 8690
Electrical installation
9.2 Electrical installation
with cable gland
NOTE!
Breakage of the pneumatic connection pieces due to rotational impact.
▶ When unscrewing and screwing the transparent cap, do not hold
the actuator of the process valve but the connection housing.
Procedure:
→ Open the Pneumatic Control Unit: unscrewing the transparent
cap in an anticlockwise direction.
→ Push the cables through the cable gland.
→ Connect the wires according to the model (options) of the Pneu-
matic Control Unit.
→ Close the Pneumatic Control Unit.
Printed
circuit board
Screw
terminals
Connection housing
Fig. 17: Position of the screw terminals
1
2
3
4
Klemmen-
5
Nummerierung
6
9.2.1 Connection diagram
with micro switches
(mechanical limit switches)
Terminal Configuration External circuit
1
Micro switch
top (NO)
2
3
Micro switch
bottom (NO)
4
Valve control
5
0 / 24 V
Valve control
6
GND
Tab. 2: Connection diagram with micro switches
1
2
3
4
5
6
Micro switch top (NO)
Micro switch top (NO)
Micro switch bottom (NO)
Micro switch bottom (NO)
0/24 V DC ± 10 %
Residual ripple 10 %
22
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Type 8690
Electrical installation
9.2.2 Connection diagram
with three-wire proximity switches
(inductive limit switches)
Terminal Configuration External circuit
INI - (GND)
1
Supply
INI 1 OUT
2
Output
INI 2 OUT
3
Output
INI + (24 V DC)
4
Supply
Valve control
5
6
0 / 24 V DC
Valve control
GND
5
6
Tab. 3: Connection diagram with three-wire proximity switches
1
2
3
4
GND
Output 1 (24 V)
Output 2 (24 V)
+24 V DC
0/24 V DC ±10 %
Residual ripple 10 %
9.2.3 Connection diagram
with two-wire proximity switches
(inductive NAMUR limit switches)
Terminal Configuration External circuit
1 INI Top +
2 INI Top -
3 INI Bottom +
4 INI Bottom -
Valve control
5
+
Valve control
6
GND
Explosion
protected area
NAMURSensor
Non-hazardous
area
1 / 3
+8,2 V DC
2 / 4
R
0 V
5
6
Tab. 4: Connection diagram with two-wire proximity switches
3) (recommended by NAMUR) Also observe the type-examination certificate
from Turck KEMA 02 ATEX 1090X
4) Signal from barrier see PTB 07 ATEX 2048
3)
4)
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Type 8690
Electrical installation
9.3 Elektrical installation with
circular plug-in connector
DANGER!
Risk of electric shock.
▶ Before working on equipment or device, switch off the power
supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations
for electrical equipment.
NOTE!
Breakage of the pneumatic connection pieces due to rotational impact.
▶ When unscrewing and screwing the transparent cap, do not hold
the actuator of the process valve but the connection housing.
→ Connect the pins according to the model (options) of the Pneu-
matic Control Unit
9.3.1 Pin assignment with micro switches
(mechanical limit switches)
2
1
8
73
5
64
Fig. 18: Circular connector M12x1, 8-pole
Pin assignment with micro switches (mechanical limit switches)
Pin Wire color5)Configuration External circuit
1 white
3 green
brown
2
yellow
4
5 grey
6 pink
Micro switch
top (NO)
Micro switch
bottom (NO)
Valve control
0 / 24 V
Valve control
GND
1
Micro switch top
3
Micro switch top
2
Micro switch bottom
4
Micro switch bottom
5
0 / 24 V DC
± 10 %
6
Residual ripple
10 %
7 not used
8 not used
Tab. 5: Pin assignment with micro switches
5)
The indicated colors refer to the connecting cable available as an
accessory (919061)
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Type 8690
Electrical installation
9.3.2 Pin assignment
with three-wire proximity switches
(inductive limit switches)
Pin assignment of the circular connector (M12x1, 8-pole):
2
1
8
73
5
64
Fig. 19: Circular connector M12x1, 8-pole
Pin assignment with three-wire proximity switches
(inductive limit switches)
Pin Wire color6)Configuration External circuit
1 white
brown
2
INI Bottom OUT
Output
INI Top OUT
Output
1
Output 1
(24 V)
2
Output 2
(24 V)
3 green
yellow
4
5 grey
6 pink
INI - (GND)
Supply
INI + (24 V DC)
Supply
Valve control
0 / 24 V
Valve control
GND
3
4
5
GND
+24 V DC
0 / 24 V DC
± 10 %
6
Residual ripple
10 %
Tab. 6: Pin assignment with three-wire proximity switches
6)
The indicated colors refer to the connecting cable available as an
accessory (919061)
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Type 8690
Electrical installation
9.4 Adjustment of the micro switch
or the proximity switches (option)
DANGER!
Risk of electric shock.
▶ Before working on equipment or device, switch off the power
supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations
for electrical equipment.
NOTE!
Breakage of the pneumatic connection pieces due to rotational impact.
▶ When unscrewing and screwing the transparent cap, do not hold
the actuator of the process valve but the connection housing.
Procedure:
→ Open the Pneumatic Control Unit: unscrewing the transparent
cap in an anticlockwise direction.
→ Adjust the lower micro switch or the proximity switches via the
adjusting screw(s) (see “Fig. 20”).
In the case of the option with micro switches only the lower
micro switch can be set with the screw, the upper micro
switch is fixed.
→ Check the switching point(s) using suitable measuring
equipment.
→ Close the Pneumatic Control Unit.
Screw for adjustment of the lower
micro switch or the lower proximity
switch
Screw for adjustment of
the upper proximity switch
Connection housing
Fig. 20: Adjustment of the micro switch and the proximity switches
Adjustment of the lower
micro switch or the proximity switches
upwards downwards
turn screw
clockwise
turn screw
anticlockwise
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Type 8690
Maintenance
10 MAINTENANCE
The Pneumatic Control Unit is maintenance-free when operated
according to the instructions in this manual.
10.1 Service at the air intake filter
DANGER!
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
To protect the internal solenoid valves and the actuator, the pressure
supply air is filtered.
The direction of flow of the air intake filter in installed state is from
the inside to the outside through the filter material.
Quick plug-in
connector
O-ring
Air intake
filter
Procedure:
→ Unlock the quick plug-in connector by pressing the holding
element and pulling out the air intake filter (if necessary, use a
suitable tool in between the recesses in the head of the filter).
→ Clean the filter or, if necessary, replace the filter.
→ Check inner O-ring and, if required, clean.
→ Insert the air intake filter all the way into the quick plug-in
connector.
DANGER!
Risk of injury due to improper installation.
▶ Ensure that the air intake filter is installed correctly.
→ Check that the air intake filter is secure.
Fig. 21: Service on the air intake filter
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