Bürkert Type 8691 Operating Instructions Manual
Type 8691
Control Head
Steuerkopf
Tête de commande
Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürker t Werke GmbH & Co.KG, 20 - 2017
Operating Instructions 1706/_(8(1_0080 / Original DE
Type 8691
Control head Type 8691
Table of ConTenTs
1 OPERATING INSTRUCTIONS ........................................................................................................................................................7
1.1 Symbols ......................................................................................................................................................................................7
1.2 Definition of term / abbreviation ...................................................................................................................................7
2 AUTHORIZED USE .............................................................................................................................................................................8
2.1 Restrictions ...............................................................................................................................................................................8
3 BASIC SAFETY INSTRUCTIONS .................................................................................................................................................9
4 GENERAL INFORMATION .............................................................................................................................................................10
4.1 Contact address ..................................................................................................................................................................10
4.2 Warranty ...................................................................................................................................................................................10
4.3 Trademarks ............................................................................................................................................................................10
4.4 Information on the internet ............................................................................................................................................10
5 SYSTEM DESCRIPTION ................................................................................................................................................................11
5.1 Configuration and function ............................................................................................................................................11
5.1.1 Control head for integrated installation on the 21xx series ......................................................11
5.1.2 Model for control of process valves belonging to the 20xx series ..........................................12
6 TECHNICAL DATA .............................................................................................................................................................................13
6.1 Conformity ..............................................................................................................................................................................13
6.2 Standards ................................................................................................................................................................................13
6.3 Licenses ...................................................................................................................................................................................13
6.4 Operating conditions ........................................................................................................................................................13
6.5 Mechanical data ...................................................................................................................................................................13
6.6 Type labels ..............................................................................................................................................................................14
6.6.1 Type label standard ............................................................................................................................14
6.6.2 UL Type label .......................................................................................................................................14
6.6.3 UL additional label ..............................................................................................................................14
6.7 Pneumatic data ....................................................................................................................................................................15
English
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Type 8691
6.8 Electrical data .......................................................................................................................................................................15
6.8.1 Electrical data without bus control 24 V DC ...............................................................................15
6.8.2 Electrical data with AS-Interface bus control ..............................................................................15
6.8.3 Electrical data with DeviceNet bus control ..................................................................................16
7 INSTALLATION ...................................................................................................................................................................................17
7.1 Safety instructions .............................................................................................................................................................17
7.2 Installing the control head Type 8691 on process valves belonging to series 21xx ......................17
7.3 Installing the control head Type 8691 on process valves belonging to series 20xx ......................21
7.4 Rotating the actuator module ......................................................................................................................................24
7.5 Rotating the control head for process valves belonging to series 20xx ..............................................26
8 PNEUMATIC INSTALLATION .......................................................................................................................................................27
9 ELECTRICAL INSTALLATION 24 V DC ...................................................................................................................................28
9.1 Safety instructions .............................................................................................................................................................28
9.2 Electrical installation with cable gland ....................................................................................................................28
9.3 Electrical installation with circular plug-in connector .....................................................................................30
9.4 Teach function (calibrating the end positions) ...................................................................................................30
9.5 Display elements 24 V DC .............................................................................................................................................32
9.5.1 LED status display..............................................................................................................................32
9.5.2 Device status display - assignment of the Top LEDs ................................................................33
9.5.3 Change assignment of the Top LEDs (device status) ...............................................................34
10 AS-INTERFACE INSTALLATION ................................................................................................................................................36
10.1 AS-Interface connection .................................................................................................................................................36
10.2 Technical data for AS-Interface PCBs .....................................................................................................................36
10.3 Programming data ..............................................................................................................................................................36
10.4 Electrical installation AS-Interface ............................................................................................................................37
10.4.1 Safety instructions ..............................................................................................................................37
10.4.2 Connection with circular plug-in connector M12x1, 4-pole, male .........................................37
10.4.3 Connection with multi-pole cable and ribbon cable terminal ...................................................38
10.5 Teach function (calibrating the end position) ......................................................................................................39
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Type 8691
10.6 Display elements AS-Interface ....................................................................................................................................41
10.6.1 LED status display..............................................................................................................................41
10.6.2 Device status - assignment of the LEDs .......................................................................................42
10.6.3 Change assignment of the Top LEDs (device status) ...............................................................43
11 DEVICENET ..........................................................................................................................................................................................45
11.1 Definition .................................................................................................................................................................................45
11.2 Technical data .......................................................................................................................................................................45
11.3 Maximum line lengths ......................................................................................................................................................45
11.3.1 Total line length according to DeviceNet specification .............................................................45
11.3.2 Drop line length...................................................................................................................................46
11.4 Safety setting if the bus fails ........................................................................................................................................46
11.5 Interfaces ................................................................................................................................................................................46
11.6 Electrical connection DeviceNet .................................................................................................................................46
11.6.1 Safety instructions ..............................................................................................................................46
11.6.2 Configuration of the PCB DeviceNet ............................................................................................47
11.6.3 Bus connection (circular connector M12 x 1, 5-pole, male) ....................................................47
11.7 Terminating circuit for DeviceNet systems ...........................................................................................................47
11.8 Network topology of a DeviceNet system .............................................................................................................48
11.9 Configuring the control head .......................................................................................................................................48
11.9.1 DIP switches ........................................................................................................................................48
11.10 Configuration of the process data .............................................................................................................................51
11.11 Configuration of the safety position of pilot valves for bus error .............................................................52
11.12 Teach function (calibrating the end position) ......................................................................................................53
11.12.1 Starting the teach function ...............................................................................................................55
11.13 Display elements DeviceNet .........................................................................................................................................55
11.13.1 LED status display..............................................................................................................................55
11.13.2 Function test of the status LEDs ....................................................................................................56
11.13.3 Device status - assignment of the LEDs .......................................................................................57
11.13.4 Status LED yellow ..............................................................................................................................58
12 SAFETY POSITIONS .......................................................................................................................................................................59
13 MAINTENANCE ..................................................................................................................................................................................60
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Type 8691
13.1 Service at the air intake filter .......................................................................................................................................60
14 DISASSEMBLY ...................................................................................................................................................................................61
14.1 Safety instructions .............................................................................................................................................................61
14.2 Disassembly the control head .....................................................................................................................................61
15 ACCESSORIES ..................................................................................................................................................................................63
15.1 Communications software .............................................................................................................................................63
15.2 USB interface ........................................................................................................................................................................63
15.3 Download ................................................................................................................................................................................63
16 PACKAGING AND TRANSPORT ...............................................................................................................................................64
17 STORAGE ..............................................................................................................................................................................................64
18 DISPOSAL ............................................................................................................................................................................................64
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Type 8691
Operating instructions
1 OPERATING INSTRUCTIONS
The operating instructions describe 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.
Failure to observe these instructions may result in hazardous situations.
▶ 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 control head Type 8691.
In these instructions, the abbreviation “Ex” always refers to “potentially explosive”.
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Type 8691
Authorized use
2 AUTHORIZED USE
Non-authorized use of the control head Type 8691 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.
▶ In the potentially explosion-risk area the control head Type 8691 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.
▶ 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 control head is suitable for the actual use planned.
▶ Correct transportation, correct storage and installation and careful use and maintenance are essential for reli-
able and faultless operation.
▶ Use the control head Type 8691 only as intended.
2.1 Restrictions
If exporting the system/device, observe any existing restrictions.
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Type 8691
Basic safety instructions
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 – the operator is responsible for observing these regulations, also with reference to the
installation personnel.
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.
General hazardous situations.
To prevent injury, ensure:
▶ 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 on 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 body casing or the transparent cap, do not hold the actuator of the pro-
cess valve but the connection housing of Type 8691.
▶ 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. Do not paint the housing parts or screws.
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Type 8691
General information
4 GENERAL INFORMATION
4.1 Contact address
Germany
Bürkert Fluid Control System
Sales Center
Chr.-Bürkert-Str. 13-17
D-74653 Ingelfingen
Tel. + 49 (0) 7940 - 10 91 111
Fax + 49 (0) 7940 - 10 91 448
E-mail: info@de.buerkert.com
International
Contact addresses can be found on the final pages of the printed operating instructions.
And also on the Internet at:
www.burkert.com
4.2 Warranty
The warranty is only valid if the control head Type 8691 is used as intended 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
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The operating instructions and data sheets for Type 8691 can be found on the Internet at:
www.burkert.com
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Type 8691
System description
5 SYSTEM DESCRIPTION
5.1 Configuration and function
The control head Type 8691 can control single or double-acting process valves.
The control head Type 8691 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”.
The valve position is recorded via a contactless, analog sensor element which uses the teach function to automati-
cally detect and save the valve end positions during start-up.
Apart from the electrical position feedback, the status of the device is optically displayed on the control head itself
by a colored high-power LED.
Option: Communication possible via AS-Interface or DeviceNet.
5.1.1 Control head for integrated installation on the 21xx series
Views without transparent cap and body casing
Teach function
Description see chapter on the appropriate model
„Teach function (calibrating the end positions)“
Pilot air port
label: 1
Exhaust air port
label: 3
Pressure limiting valve (for protection against too high internal
pressure in case of error)
24 V DC: Cable gland M16 x 1.5 or circular plug-in connector M12 x 1
Device status display (Top LEDs)
Status display pilot valve
Air intake filter (exchangeable)
Figure 1: Design and function
Screw terminals
Pilot valve (3/2-way or 5/2-way solenoid valve with hand lever)
Fastening screws (2x)
Connection housing
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Type 8691
System description
5.1.2 Model for control of process valves belonging to the 20xx
series
A special model enables the control head Type 8691 to be attached to process valves belonging to the 20xx series.
This model features has a different connection housing so that the pilot air ports can be connected to the outside
of the actuator (see “Figure 2”).
Pilot air outlet 2
Pilot air outlet 2
1
2
Fastening screws (2 x)
Connection housing
Figure 2: Connection module for process valves belonging to the 20xx series
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Type 8691
Technical data
6 TECHNICAL DATA
6.1 Conformity
In accordance with the EC Declaration of conformity, the control head Type 8691 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 Licenses
The product is approved for use in zone 2 and 22 in accordance with ATEX directive 94/9/EC category 3GD.
Observe instructions on operation in an explosion-risk (Ex) area.
Observe the ATEX additional instructions.
The product is cULus approved. Instructions for use in the UL area see chapter “6.8 Electrical data”.
6.4 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 mini-
mum value.
Ambient temperature see type label
Degree of protection
Evaluated by the manufacturer: Evaluated by UL:
IP65 / IP67 according to EN 60529
1) Only if cables, plugs and sockets have been connected correctly and in compliance with the exhaust air concept see
chapter “8 Pneumatic installation”.
1)
UL Type 4x Rating
1)
6.5 Mechanical data
Dimensions see data sheet
Body material exterior: PPS, PC, VA
Sealing material exterior: EPDM
interior: NBR
Stroke range of valve spindle 2 – 28 mm
2 – 47 mm
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6.6 Type labels
6.6.1 Type label standard
Example:
Supply voltage / control
Type
8691 AS-i 62SI
single act Pilot 3,0
Pmax 7bar
Tamb 0°C - +55°C
Ser.-Nr. 001000
00179024
D-74653 Ingelfingen
W14UN
Type 8691
Technical data
Control function - pilot valve
Max. operating pressure
Max. ambient temperature
CE
Serial number - CE mark
Identification number
Figure 3: Example of type label
6.6.2 UL Type label
Example:
8691 -E3-...-0 PU02
Single act Pilot 3.0 24V
Pmax 7 bar
Tamb -10 - +55 °C
S/N 1001
00123456
D-74653 Ingelfingen
Figure 4: UL Type label (example)
Bar code
Type; Features of the type code applicable to UL
and ATEX
Control function; pilot valve;
Supply voltage pilot valve
Max. operating pressure
CE
W15MA
Max. ambient temperature
Serial number; CE mark
Bar code
Identification number; Date of
manufacture (encoded)
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6.6.3 UL additional label
Example:
Degree of protection
Circuit with limited power
Supply voltage device
Figure 5: UL additional label (example)
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Type 4X enclosure
NEC Class 2 only
Supply voltage: 24 V
Type 8691
Technical data
6.7 Pneumatic data
Control medium neutral gases, air; Quality classes in accordance with ISO 8573-1
Dust content Class 7 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 X max. 25 mg/m
3
Temperature range -10 – +50 °C
Pressure range 3 – 7 bar
Air output of pilot valve 250I
/min (for ventilation and exhaust)
N
(QNn value according to definition for pressure drop from 7 to 6 bar absolute)
Connections Plug-in hose connector Ø 6 mm / 1/4"
Socket connection G1/8
6.8 Electrical data
WARNING!
Only circuits with limited power may be used for UL approved components according to “NEC Class 2”.
6.8.1 Electrical data without bus control 24 V DC
Protection class 3 as per DIN EN 61140 (VDE 0140-1)
Connections Cable gland M16 x 1.5, wrench size 22 (clamping area 5 – 10 mm)
with screw-type terminals for cable cross-sections 0.14 – 1.5 mm²
Circular plug-in connector (M12 x 1, 8-pole)
Pilot valve
Operating voltage 24 V DC ± 10 % residual ripple 10 %
Power input max. 1W
Output max. 100 mA per output
Display max. 20 mA per illustrated illuminated display (LED)
6.8.2 Electrical data with AS-Interface bus control
Protection class 3 as per DIN EN 61140 (VDE 0140-1)
Connections Circular plug-in connector (M12 x 1, 4-pole)
Operating voltage 29.5 V – 31.6 V DC (according to specification)
Outputs
Max. switching capacity 1 W via AS-Interface
Watchdog function integrated
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Type 8691
Technical data
Devices without external supply voltage:
Max. power consumption 120 mA
Power consumption input during normal operation
(after current reduction;
valve + 1 end position reached) 90 mA
Devices with external supply voltage:
External supply voltage 24 V ± 10 %
The power supply unit must
include a secure disconnection in
accordance with IEC 364-4-41
(PELV or SELV)
Max. power consumption 55 mA (after current reduction ≤ 30 mA)
Max. power consumption from AS-Interface 55 mA
6.8.3 Electrical data with DeviceNet bus control
Protection class 3 as per DIN EN 61140 (VDE 0140-1)
Connections Circular plug-in connector (M12 x 1, 5-pole)
Operating voltage 11 V – 25 V
Max. power consumption < 80 mA
Output Pull-in current current ≤ 50 mA
Holding current ≤ 30 mA
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Type 8691
Installation
7 INSTALLATION
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 assembly, ensure a controlled restart.
7.2 Installing the control head Type 8691 on process
valves belonging to series 21xx
NOTE!
When mounting on process valves with a welded body, follow the installation instructions in the operating instructions for the process valve.
Procedure:
1. Install switch spindle
Transparent cap
Pilot air ports
(plug-in hose connectors with collets or
threaded bushings)
Actuator
Figure 6: 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 (if present).
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Type 8691
Installation
→ For model with plug-in hose connector, remove the collets (white nozzles) from both pilot air ports (if present).
Puck
Switch spindle
Guide element
Groove ring
max. 1 Nm
max. 5 Nm
Actuator cover
O-ring
Spindle extension
Figure 7: Installing of the switch spindle (2), series 21xx
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.
→ 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.
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→ Check that the O-ring is correctly positioned.
→ Screw the guide element 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).
→ Push puck onto the switch spindle and lock into position.
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Type 8691
Installation
2. Install sealing rings
→ Pull the form seal onto the actuator cover (smaller diameter points upwards).
→ Check that the O-rings are correctly positioned in the pilot air ports.
When the control head is being installed, the collets of the pilot air ports must not be fitted to the actuator.
Form seal
Pilot air ports
Caution:
Collets must not be
fitted !
Figure 8: Installing of the sealing rings, 21xx series
Installation of the form
seal
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19
Type 8691
Installation
3. Install the control head
NOTE!
Damaged printed circuit board or malfunction.
▶ Ensure that the puck is situated flat on the guide rail.
→ Align the puck and the control head until
1. the puck can be inserted into the guide rail of the control head (see “Figure 9”) and
2. the connection pieces of the control head can be inserted into the pilot air ports of the actuator
(see “Figure 10”).
Guide rail
Puck
Figure 9: Aligning the puck
→ Push the control head, 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 1.5 Nm only.
→ Attach the control head to the actuator using the two side fastening screws. In doing so, tighten the screws
only hand-tight (max. torque: 1.5 Nm).
Connection pieces
Pilot air ports
Fastening screws
max. 1.5 Nm
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Figure 10: Installation of control head, series 21xx
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Type 8691
Installation
7.3 Installing the control head Type 8691 on process
valves belonging to series 20xx
Procedure:
1. Install switch spindle
Transparent cap
Position indicator
Actuator
Figure 11: 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.
Puck
Switch spindle
Guide element
O-ring
Plastic part
(of the switch spindle)
Spindle (actuator)
Figure 12: Installation of the switch spindle (2), series 20xx
→ Press the O-ring downwards into the cover of the 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
2)
into the actuator cover (torque: 8.0 Nm).
→ 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).
→ Push the puck onto the switch spindle until it engages.
2) journal Ø: 3 mm; journal gap: 23.5 mm
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Type 8691
Installation
2. Installation of the masking ring and the control head
Guide rail
Masking ring
Puck
Figure 13: Installation of the masking ring and aligning the puck
→ Pull the masking ring onto the actuator cover (for actuator sizes ∅ 50 and ∅ 63 only).
NOTE!
Damaged printed circuit board or malfunction.
▶ Ensure that the puck is situated flat on the guide rail.
→ Push the control head onto the actuator. The puck must be aligned in such a way that it is inserted into the
guide rail of the control head.
→ Press the control head all the way down as far as the actuator and turn it into the required position.
Fastening screws
max. 1.5 Nm
Figure 14: Installation of the control head
Ensure that the pneumatic connections of the control head and those of the valve actuator are situated
preferably vertically one above the other (see “Figure 15”).
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.
22
▶ The fastening screws may be tightened to a maximum torque of 1.5 Nm only.
→ Attach the control head to the actuator using the two side fastening screws. In doing so, tighten the fastening
screws hand-tight only (maximum torque: 1.5 Nm).
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Type 8691
Installation
3. Install pneumatic connection between control head and actuator
Pilot air outlet 2
Pilot air outlet 2
Upper pilot air port
1
2
Example
∅ 80, CFA
Lower pilot air port
Figure 15: Installation of the pneumatic connection, 20xx series
→ Screw the plug-in hose connectors onto the control head and the actuator.
→ Using the hoses supplied in the accessory kit, make the pneumatic connection between the control head and
actuator with the following “Table 1” or “Table 2”.
NOTE!
Damage or malfunction due to ingress of dirt and moisture.
▶ To comply with degree of protection IP65 / IP67, connect the pilot air outlet which is not required (on CFA
and CFB) to the free pilot air port of the actuator or seal with a plug.
Control function A (CFA)
Process valve closed in rest position (by spring force)
Control head Pilot air outlet
Actuator
Upper pilot air port
Lower pilot air port
Control function B (CFB)
Process valve open in rest position (by spring force)
Control head Pilot air outlet
Actuator
Upper pilot air port
Lower pilot air port
Table 1: Pneumatic connection to actuator CFA and CFB
222
222
1
222
1
or
1
222
1
or
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Control function I (CFI)
Process valve closed in rest position
Control head Pilot air outlet
222
Type 8691
Installation
1
Actuator
Upper pilot air port
Lower pilot air port
Process valve open in rest position
Control head Pilot air outlet
Actuator
Upper pilot air port
222
1
Lower pilot air port
Table 2: Pneumatic connection to actuator CFI
"In rest position" means that the pilot valves of the control head Type 8691 are isolated or not actuated.
If the ambient air is humid, a hose can be connected between pilot air outlet 22 of the control head 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 control head.
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7.4 Rotating the actuator module
The actuator module (control head 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 (control head and actuator)
through 360°.
Process valves Type 2100 and 2101: Only the entire actuator module can be rotated. The control head
cannot be rotated contrary to the actuator.
The process valve must be in the open position for alignment of the actuator module.
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:
→ 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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Type 8691
Installation
Actuator
module
Key contour
Nipple
Hexagon
Nipple
with hexagonwithout hexagon
Figure 16: Rotating the actuator module
→ Using a suitable open-end wrench, counter the wrench flat on the pipe.
→ Actuator module without hexagon:
Fit special key3) 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.
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 “Figure 17”).
→ 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
Figure 17: Rotating with special key / open-end wrench
3) The special key (665702) is available from your Bürkert sales office.
without hexagonwith hexagon
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Type 8691
Installation
7.5 Rotating the control head for
process valves belonging to series 20xx
If the connecting cables or hoses cannot be fitted properly following installation of the process valve, the control
head can be rotated contrary to the actuator.
Fastening screw (2x)
Control head
Pneumatic connection
Actuator
Figure 18: Rotating the control head, series 20xx
Procedure
→ Loosen the pneumatic connection between the control head and the actuator.
→ Loosen the fastening screws (hexagon socket wrench size 2.5).
→ Rotate the control head 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 1.5 Nm only.
→ Tighten the fastening screws hand-tight only (maximum torque: 1.5 Nm).
→ Re-attach the pneumatic connections between the control head and the actuator. If required, use longer
hoses.
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Type 8691
Pneumatic installation
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.
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.
Procedure:
→ Connect the control medium to the pilot air port (1)
(3 – 7 bar; instrument air, free of oil, water and dust).
→ Attach the exhaust airline or a silencer to the exhaust air port (3) (see “Figure 19”).
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 port.
Pilot air port
label: 1
Exhaust air port
label: 3
Figure 19: 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.
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Type 8691
Electrical installation 24 V DC
9 ELECTRICAL INSTALLATION 24 V DC
Two kinds of connections are used for the electrical bonding of the control head:
• Cable gland
with cable gland M16 x 1.5 and screw terminals
• Multi-pole
with circular plug-in connector M12 x 1, 8-pole
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.
9.2 Electrical installation with cable gland
NOTE!
Breakage of the pneumatic connection pieces due to rotational impact.
▶ When unscrewing and screwing in the body casing, do not hold the actuator of the process valve but the
connection housing.
→ Unscrew the body casing (stainless steel) in a counter-clockwise direction.
Body casing
28
Connection housing
Actuator
Figure 20: Open control head
→ Push the cables through the cable gland.
→ Connect the wires (see connection diagram in “Figure 21: Printed circuit board 24 V DC - cable gland”).
english
Type 8691
Electrical installation 24 V DC
Valve connection
Jumper for assignment of Top LEDs
Connection diagram:
Screw terminals
End positions
Screw terminals
Supply 24 V DC
Screw terminals
Valve (control)
IN 1
IN 2
24 V
Valve
+
-
+
-
Jumper function:
You can set the color assignment of the
end positions with the jumpers.
see chapter
IN 1 = Top (top)
IN 2 = Bot (bottom)
“9.5.2 Device status display - assignment
of the Top LEDs” and
“9.5.3 Change assignment of the Top
LEDs (device status)”
Figure 21: Printed circuit board 24 V DC - cable gland
→ Check that the seal is correctly positioned in the body casing.
NOTE!
Breakage of the pneumatic connection pieces due to rotational impact.
ye
Top
Bot
gn
Bot
Top
▶ When unscrewing and screwing in the body casing, do not hold the actuator of the process valve but the
connection housing.
Damage or malfunction due to penetration of dirt and humidity.
To ensure degree of protection IP65 / IP67:
▶ Tighten the union nut on the cable gland according to the cable size or dummy plugs used. (ca. 1.5 Nm).
▶ Screw the body casing in all the way.
→ Tighten union nut on the cable gland (torque approx. 1.5 Nm).
→ Close the device (assembly tool: 674077
Figure 22: Position of the seal in the body casing
The teach function can now be used to automatically determine and read in the end positions of the valve
(description of the teach function see chapter “9.4 Teach function (calibrating the end positions)”).
4)
).
Body casing
Seal
body casing
Connection housing
4) The assembly tool (674077) is available from your Bürkert sales office.
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Type 8691
Electrical installation 24 V DC
9.3 Electrical 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.
→ Connect the control head according to the table.
Configuration circular plug (M12 x 1, 8-pole):
Pin Wire color5)Designation Configuration
5
6
7
8
1
Table 3: Circular plug M12 x 1, 8-pole
4
3
2
1
2
3
4
5
6
7
8
white limit switch top IN 1 (= Top)
brown limit switch bottom IN 2 (= Bot)
green supply voltage GND
yellow supply voltage + 24 V DC
grey Valve control + Valve +
pink Valve control – Valve –
- not used
- not used
The teach function can now be used to automatically determine and read in the end positions of the valve
(description of the teach function see chapter “9.4 Teach function (calibrating the end positions)”).
9.4 Teach function (calibrating the end positions)
The teach function can be used to automatically determine and read in the end positions of the valve.
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.
Necessary requirements:
Before you can actuate the teach function, you must
• mount the control head on the actuator,
• connect the supply voltage and
• connect the compressed-air supply.
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5) The indicated colors refer to the connecting cable available as an accessory (919061)
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