Burkert 8605 Series User manual
Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
Digital Control Electronics for Proportional Valves
Digitale Ansteuerelektronik für Proportionalventile
Régulateur électronique numérique pour vannes proportionnelles
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© 2007 - 2009 Bürkert Werke GmbH
Operating Instructions 0907/03_EU-ML_00805613 / Original DE
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Co n t e n t s
5.3.1. Type 8605 Cable plug version .............................................................................................................10
5.3.2. Type 8605 DIN rail version ....................................................................................................................11
7.1.1. Operating unit ..........................................................................................................................................13
7.1.2. LED’s during operation without operating unit .................................................................................14
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8.2.1. Cable plug version ..................................................................................................................................17
8.2.2. DIN rail version .........................................................................................................................................19
9.3.1. InP (Input) - Selection of the input signal ..........................................................................................23
9.3.2. Out (Output) - Valve settings ...............................................................................................................23
9.3.3. VAdJ (Valve adjust) - Fine tuning of the valve frequency ...............................................................27
9.3.4. AdJ (Adjust) - Adaptation of the coil current ....................................................................................28
9.3.5. dELY (Delay) - Ramp function ..............................................................................................................29
9.3.6. Cut (Cut off) - Zero point cut off .........................................................................................................30
9.3.7. PArA (Parameter) - Controller setting ................................................................................................31
9.3.8. Addr (Address) - Interfaces ..................................................................................................................31
9.3.9. SPOS (Safe position) - Setting of the safety position ...................................................................32
9.3.10. dAtA (Data) - Upload and Download of parameters between the operating unit and the
basic device ..............................................................................................................................................32
9.3.11. END ............................................................................................................................................................33
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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.
Failure to observe these instructions may result in hazardous situations.
The operating instructions must be read and understood.•
Failure to observe the warning may result in a fatal or serious injury.•
Failure to observe the warning may result in serious injuries or death.•
Failure to observe the warning may result in moderately serious or minor injuries.•
Failure to observe the warning may result in damage to the device or the equipment. •
Designates additional significant information, tips and recommendations.
Refers to information in these operating instructions or in other documentation.
designates a procedure which you must carry out.
→
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6
Intended Use
The device is designed for the open-loop control and closed-loop control of media. The device must not be •
exposed to direct sunlight.
Do not use the device outdoors.•
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.
Correct transportation, correct storage and installation and careful use and maintenance are essential for reli-•
able and faultless operation.
Use the device only as intended.•
Wrong choice of valve: •
If a wrong valve is selected, mechanical damage can occur, e. g. with Type 2822, if the control frequency is too
low.
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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.
Before loosening the lines and valves, turn off the pressure and vent the lines.•
Before reaching into the device or the equipment, switch off the power supply and secure to prevent •
reactivation!
Observe applicable accident prevention and safety regulations for electrical equipment!•
Avoid pressure drops! •
Design the pressure supply system with as large a volume as possible, even with upline devices such as e. g. •
pressure regulators, air conditioners, shut-off valves.
To prevent injury, ensure that:
That the system cannot be activated unintentionally.•
Installation and repair work may be carried out by authorised 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.•
The device contains electronic components which react sensitively to electrostatic discharge (ESD). Contact with
electrostatically charged persons or objects is hazardous to these components. In the worst case scenario, they
will be destroyed immediately or will fail after start-up.
Observe the requirements in accordance with •
EN 61340-5-1 and 5-2 to minimise or avoid the possibility of damage caused by sudden electrostatic
discharge!
Also ensure that you do not touch electronic components when the power supply voltage is present! •
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Basic Safety Instructions
The Type 8605 was developed with due consideration given to the accepted safety rules and are state-of-
the-art. Nevertheless, dangerous situations may occur.
Failure to observe this operating manual and its operating instructions as well as unauthorized tampering
with the device release us from any liability and also invalidate the warranty covering the devices and
accessories!
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General Information
Check immediately upon receipt of the delivery that the contents are not damaged and that the type and scope
agree with the delivery note.
If there are any discrepancies, please contact us immediately.
Bürkert Fluid Control Systems
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: [email protected]
Contact addresses can be found on the final pages of the printed operating instructions.
And also on the Internet at:
www.burkert.com Bürkert Company Locations
This document contains no promise of guarantee. Please refer to our terms of sales and delivery. The warranty is
only valid if the device is used as authorized in accordance with the specified application conditions.
The warranty extends only to defects in the Type 8605 and its components.
We accept no liability for any kind of collateral damage which can occur due to failure or malfunction of the
device.
Operating instructions and data sheet for Type 8605 can be found on the Internet at:
www.burkert.com Documentation Type 8605
The complete documentation is also available on CD which can be ordered by quoting part no. 804625.
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Product description
The Control Electronics, Type 8605, is designed for continuous operation in industrial environments, in particular in
the fields of open-loop and closed-loop control engineering.
The Digital Control Electronics for Proportional Valves, Type 8605 (hereinafter referred to as Control Electronics,
Type 8605) controls all Bürkert proportional valves with a max. current in the range from 40 to 2000 mA.
It transforms an external standard signal into a pulse-width modulated voltage signal (PWM) that is supplied to the
solenoid coil of the proportional valve.
A given value of the average coil current is thereby assigned to each value of the input signal. The proportional
opening of the valve can be set via the coil current.
The Control Electronics is available in two forms.
Type 8605 Cable plug versionFigure 1:
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Product description
Plug-in version on valves with connector pattern A (e. g. types 2832, 2833, 2834, 2835, 2836, 2853, 6022,6023,6024,
6223).
The operating unit can be removed after the setting process. During operation of the Control Electronics 8605 in
cable plug version without operating unit, the operating status is indicated by two LED’s.
Variant 1 for valves with a max. current from 200 to 1000 mA•
Variant 2 for valves with a max. current from 500 to 2000 mA•
Type 8605 DIN rail versionFigure 2:
Separate electronics in housing for DIN rail mounting to DIN EN 50022. This form is suitable for all proportional
valves in the indicated current range. The operating unit cannot be removed.
Variant 1 for valves with a max. current from 40 to 220 mA•
Variant 2 for valves with a max. current from 200 to 1000 mA•
Variant 3 for valves with a max. current from 500 to 2000 mA•
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Technical Data
Do not use the Type 8605 outdoors and avoid heat sources which may result in the permitted temperature •
range to be exceeded.
Power supply 12...24V DC ± 10%
Residual ripple 5 %
Power consumption ca. 1 W
Output current (on the valve) max. 2 A
Operating temperature -10 ... 60º C / 14 ...140ºF
Interference resistance to EN50082-2
Emission to EN50081-2
Current range, depending
on the version for valves 40 ... 220 mA,
200 ... 1000 mA,
500 ... 2000 mA
Voltage (0 ... 5, 0 ... 10 V) input impedance > 20 kW
Current (0 ...20, 4 ... 20 mA) input impedance <200 W
Degree of protection IP40 (DIN EN 60529)
Materials Polyamide / PBT
Dimensions LxBxH: 97x27x57 mm
Degree of protection IP65 (DIN EN 60529)
Materials Polyamide / PC
Dimensions LxBxH: 70x32x42.5 mm
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Configuration and Function
The operating unit consists of a LCD and keys. It is used for displays and settings of the Control Electronics, Type
8605.
Unit of the displayed value
(s, Hz, %, mA, V)
LCD
Lower limit
= active
= not active
Setpoint = Setpoint
(of the coil current)
Process value = Actual value
(of the coil current)
Upper limit
Operating unitFigure 3:
Switch over the display
value
PV [mA] process value
PV [%] process value
SP [%] setpoint
TV [%] duty cycle
Scroll up
(selection)
Increment (increase)
numerical values
Scroll down
(selection)
Decrement (decrease)
numerical values
3 sec
Enter configuration mode
Confirm the
selected menu item
Select and deselect the individual menu
items
Switch between
main-menu and
sub-menu items
e. g.: Out-VALV
Confirm set values
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Configuration and Function
During operation of the Control Electronics 8605 without operating unit, the operating status is indicated by two
LED’s.
LED green: Device in operation
LED yellow: Current through valve
LED’s on version without operating unitFigure 4:
The Control Electronics, Type 8605, is suitable for the control of all Bürkert proportional valves with a max. current
in the range from 40 to 2000 mA. It transforms an external standard signal into a pulse-width modulated voltage
signal (PWM) that is supplied to the solenoid coil of the proportional valve (see Figure 5: Basic function of the
Control Electronics, Type 8605). A given value of the average coil current is thereby assigned to each value of the
input signal. The proportional opening of the valve can be set via the coil current.
Loadp1
0 ... 5/10 V
0/4 ... 20 mA
Standard
Figure 5: Basic function of the Control Electronics, Type 8605
0 to 5 V, 0 to 10 V, 0 to 20 mA or 4 to 20 mA can be set as standard signals.
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Configuration and Function
Due to the inductivity of the coil, the rectangular time curve of the PWM voltage signals is not transformed into a
corresponding current curve; instead the coil current has a sawtooth like „rounded“ time curve (see Figure 6: Time
response of PWM voltage signal and coil current). The mean (effective) coil current over time depends on the pulse
duty factor τ of the voltage signal.
τ = ton /(ton+ toff)
The curve of the coil current in the cycle of the PWM frequency generates a proportional change in the magnetic
force acting on the armature and hence, with an appropriate choice of this frequency (see chapter 7.3.Adjustment to
the Valve and Application Data), a steady slight movement of the armature about its momentary equilibrium position
(dither movement). This avoids static friction effects at the bearing points.
toff ton
t
U
I
Figure 6: Time response of PWM voltage signal and coil current
Due to the intrinsic heating of the coil and the associated large changes in resistance of the winding, the coil current
and hence the opening of the valve with a fixed pulse duty factor do not remain constant. An internal current control
system serves to compensate these thermal effects by corresponding tracking of the pulse duty factor.
The working range of a valve in a particular application depends greatly on its nominal size and the prevailing pressure
conditions.
In order to adapt the working range optimally to the range of the control signal, the key values for the effective coil
current are set via the operating unit in such a way that:
the opening of the valve starts at a current value slightly above the lower key value (I• 1) and
the full flow rate is achieved at a current value slightly below the upper key value (I• 2).
The lower key value is the current controlled at the lowest value of the standard signal (0 V, 0 mA or 4 mA).
The upper key value is obtained at the maximum value of the standard signal (5 V, 10 V or 20 mA).
Between the two key values, the effective coil current has a linear relationship to the input signal (see Figure 7:
Current over standard signal:)
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Configuration and Function
I2
I1
I
2 % 100 %
Standard signal
Figure 7: Current over standard signal
The working range can also be scaled using the key values I1 and I2 in such a way that only a part of the full opening
of the valve is covered over the full range of the standard signal. In particular the flow rate range can be limited to a
smaller value than the valve would permit under the given pressure conditions.
The zero point cut-off guarantees the leak-tight closing of the valve at input signals below a given threshold of the
input signal (e.g. < 2 % of the limit value). In this case at values below this threshold, the coil current is set - in
deviation from the line shown in Figure 7: Current over standard signal - to zero so that the full force of the return
spring of the valve acts as a closing force.
The zero point cut-off can be optionally activated or deactivated.
A serves to attenuate sudden changes in the input signal and to transform them into an adjustable ramp
(time constant 0 to 10 s) (see Figure 8: Ramp function). This is expedient for applications in which sudden changes
in the fluidic controlled variable are undesirable. The ramps can be set separately for positive and negative jumps.
The frequency of the PWM signal must be adapted to the valve used.
t
Standard signal
Current
Figure 8: Ramp function
The with superordinate controllers (PC’s, etc.) is possible via RS232 or RS485 interfaces
using auxiliary modules (see 11.1.Ordering charts: Device variants).
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Installation
Before loosening the lines and valves, turn off the pressure and vent the lines.•
Before reaching into the device or the equipment,• switch off the power supply and secure to prevent
reactivation!
Observe applicable accident prevention and safety regulations for electrical equipment!•
Installation may be carried out by authorised technicians only and with the appropriate tools!•
Secure system from unintentional activation.•
Following assembly, ensure a controlled restart.•
Before reaching into the device or the equipment,• switch off the power supply and secure to prevent
reactivation!
Observe applicable accident prevention and safety regulations for electrical equipment!•
The electrical connection of the Controller Type 8605 in cable plug version is made via a 4-pin terminal strip inside
the device.
Cable:
Diameter 6 ... 8 mm•
Cross-section max. 0.75 mm²•
Cable connections Cable gland or plug connector M12 •
4-pin
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Installation
12 . 24 V DC GND
Standard signal (-)
Standard signal (+)
Terminal strip connectionFigure 9:
12 . 24 V DC
GND Standard signal (-)
Standard signal (+)
Plug connector connectionFigure 10:
Ensure proper seating of the valve when screwing onto the valve (cable plug version)
Do not tighten the screw M3 too tightly, as otherwise the housing will be deformed and proper operation of the
keys will no longer be possible.
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Installation
Tighten screw M3 to max. 1 Nm
Installation of the cable plug version on the valveFigure 11:
The electrical connection of the Controller Type 8605 in DIN rail version is made via terminal strips.
2-pin for valve max. 1.5 mm²
3-pin for RS232- and RS485-interface max. 0.5 mm²
4-pin for voltage supply and standard signal max. 1.5 mm²
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Installation
1
7
6
5
2
3
49
8
Terminal strip connectionFigure 12:
Legend:
12 ... 24V DC1.
GND2.
Standard signal (-)3.
Standard signal (+)4.
Valve5.
Valve6.
RS485-B7T x D7.
RS485-A/R x D8.
GND9.
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