Burkert 8605 KK User manual
Operating Instructions
Bedienungsanleitung
Instructions de Service
Type 8605
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 resérve de modification techniques.
© 2007 Bürkert Werke GmbH & Co. KG
Operating Instructions 0707/02_EU-ML_00805613
8605 -
english
1.1 Symbols ........................................................................................................................ 5
2.1 Limitations ..................................................................................................................... 6
2.2 Foreseeable misuse ................................................................................................... 6
4.1 Scope of supply .......................................................................................................... 9
4.2 Warranty terms ............................................................................................................ 9
4. Approvals ....................................................................................................................10
4.4 Information in the Internet .......................................................................................10
5.1 General description ..................................................................................................10
5.2 Technical data .............................................................................................................11
5. Forms of the device ..................................................................................................11
5.4 Ordering charts / Accessories ..............................................................................1
6.1 Operating and Display Elements ...........................................................................15
6.2 Basic function ...........................................................................................................16
6. Adjustment to the Valve and Application Data ...................................................18
7.1 Safety Precautions ...................................................................................................20
7.2 Electrical connections ..............................................................................................20
4 - 8605
english
8.1 Operating modes ......................................................................................................24
8.2 Basic settings ............................................................................................................25
8. Menu of the configuration mode ............................................................................26
8.4 Works Settings of the Control Electronics .........................................................40
9.1 Service ........................................................................................................................41
9.2 Maintenance ...............................................................................................................41
10.1 Transport ...................................................................................................................41
11.1 Storage conditions ..................................................................................................42
11.2 Decommissioning ....................................................................................................42
11. Restarting ..................................................................................................................42
8605 - 5
english
The operating manual describes the entire life cycle of the device. Store this
manual in such a way that is easily accessible to every user and is available to
every new owner of the device.
Read the operating manual through carefully.
Observe the chapters Intended Use and General Safety Precautions!
•
•
Signifies an immediate impending danger. If it is not avoided, death or
serious injury will result.
Signifies a potentially dangerous situation. If it is not avoided, death or
serious injury may result.
Signifies a potentially dangerous situation. If it is not avoided, minor injury
or equipment damage may result.
Describes important additional information, tips and recommendations that
are important for your safety and the proper functioning of the device.
Refers to information in this operating manual or in other documents.
indicates a work step which you must carry out.→
6 - 8605
english
The Digital Control Electronics for proportional valves, type 8605, may only
be used for the applications indicated in chapter 5. Product Description, and
only in conjunction with equipment and components from other companies
recommended or approved by Bürkert. Use in any other way does not con-
stitute an intended use.
Observe the instructions in this operating manual, as well as the conditions
of use and permissible data specified in chapter 5.2 Technical Data. The
proper and safe function of the Digital Control Electronics for proportional
valves, Type 8605, depends on proper transport, storage and installation,
and on careful operation and maintenance.
Pay attention to any limitations if the system is to be exported.
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.
8605 - 7
english
Interference with the system will result in an acute risk of injury.
Switch off the pressure before disconnecting lines and valves to which
the electronics are connected!
Interference with the system will result in an acute risk of injury.
Before starting work, be sure to switch off the supply voltage and secure
it to prevent restarting!
Observe all applicable accident prevention and safety regulations for
electrical equipment!
•
•
•
Take suitable measures to prevent unintentional operation or inadmissible
damage!
This work may only be carried out by specialist personnel using appropri-
ate tools!
Ensure that the process is restarted in a defined and controlled manner
after an interruption in the electrical or pneumatic power supply!
•
•
•
Failure to observe these rules may result in injury and / or damage to the
equipment or its surroundings.
Observe the general rules of technology!
Risk of injury.
Prevent 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 condition-
ers, shut-off valves, etc.
•
•
•
8 - 8605
english
The system contains electronic components that react sensitively to elec-
trostatic discharge (ESD). Touching by electrostatically charged persons
or objects can endanger these components. In the worst case they may be
immediately destroyed or fail after commissioning.
Observe the requirements of EN 100 015 - 1 in order to avoid or mini-
mise the risk of damage caused by sudden electrostatic discharges!
Pay attention also not to touch electronic components when the supply
voltage is switched on!
•
•
The Digital Control Electronics for proportional valves, type 8605, was
developed in compliance with recognised safety engineering regulations
and represents the state of the art. However, risk may nevertheless arise.
Operate the Digital Control Electronics for proportional valves, type
8605, only when it is an undamaged state and in accordance with the
operating manual.
•
•
Failure to observe this information and unauthorised intervention in the
Digital Control Electronics for proportional valves, Type 8605, releases
us from all liability and annuls the guarantees applicable to the devices
and accessories!
•
8605 - 9
english
Immediately upon receipt of delivery, check that the contents have not been
damaged and that the delivery matches the delivery note or packing list in
type and scope. Please contact us immediately in the event of discrepan-
cies.
Contact Address:
Bürkert Fluid Control System
Sales Centre
Chr.-Bürkert-Str. 1-17
D-7465 Ingelfingen
Tel. : 07940 - 10 111
Fax: 07940 - 10 448
Contact addresses are found on the final pages of this operating manual.
You can also find information on the Internet under:
www.buerkert.com Bürkert Company Locations
This document does not offer any form of warranty. Please refer to our gen-
eral terms and conditions of business.
A precondition for the guarantee is the intended use of the Digital Control
Electronics for proportional valves, Type 8605, in accordance with the
specified operating conditions.
The guarantee covers only the freedom from defects of the Digital Control
Electronics for proportional valves, Type 8605, and its components.
We accept no liability for consequential damage of any kind which may
arise from the failure or incorrect operation of the device.
10 - 8605
english
The approval mark shown on the Bürkert rating plates refers to the Bürkert
products.
Operating manual and data sheet for the Digital Control Electronics for pro-
portional valves, Type 8605, can be found on the Internet under:
www.buerkert.com technical data data sheets type 8605
Furthermore, the complete documentation is available on CD. The operating
manual can be ordered under the following identification number (ID no.):
0080561.
The Digital Control Electronics for proportional valves, Type 8605, (hereinaf-
ter referred to as 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 volt-
age 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, Type 8605, is designed for continuous operation in
industrial environments, in particular in the fields of open-loop and closed-
loop control engineering.
8605 - 11
english
Power supply 12 ... 24 V DC
(±10 %, Residual ripple < 5 %)
Power consumption (without valve) approx. 1 W
Output current (to the valve) max. 2 A
Operating temperature -10 ... 60 °C / 14 ... 140 °F
Interference resistance to EN50082-2
Emitted interference to EN50081-2
Current range, depending on the
version for valves
40 to 220 mA, 200 to 1000 mA,
500 to 2000 mA
Standard signal input
Voltage (0 ... 5 V, 0 ... 10 V)
Current (0 ... 20 mA, 4 ... 20 mA)
•
•
input impedance > 20 kOhm
input impedance < 200 Ohm
Housing DIN rail version
Degree of protection to
DIN EN 60529
Materials
Dimensions
•
•
•
IP40
polyamide / PBT
LxWxH: 97x27x57 mm
Housing Cable head version
Degree of protection to
DIN EN 60529
Materials
Dimensions
•
•
•
IP65
polyamide / PC
LxWxH: 70x2x42.5 mm
12 - 8605
english
The Control Electronics is available in two forms.
Plug-in version on valves with connector pattern A (e. g types 282, 28,
284, 285, 286, 6022, 602, 6024, 622).
The operating unit (see chapter 6.1.1 Operating Unit) can be removed after
the setting process.
During operation of the Control Electronics 8605 in cable head version
without operating unit, the operating status is indicated by two LEDs (see
chapter 6.1.2 LEDs on versions without operating unit).
Two device variants are available:
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.
Separate electronics in housing for DIN rail mounting to DIN EN 50022.
This form is suitable for all proportional vales in the indicated power range.
The operating unit (see chapter 6.1.1 Operating Unit) cannot be removed.
Three device variants are available:
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 for valves with a max. current from 500 to 2000 mA.
•
•
•
•
•
8605 - 1
english
Incorrect accessories or unsuitable spare parts can result in injuries and in
damage to the device and its surroundings.
Use only original accessories and original spare parts from
Bürkert GmbH & Co. KG!
•
40 to
220 mA
200 to
1000 mA
200 to
1000 mA
500 to
2000 mA
500 to
2000 mA
178 62 178 6 178 54
178 55
178 58
178 59
178 64 178 56
178 57
178 60
178 61
2822 24 V DC X
2822 12 V DC X
2824 24 V DC X X
2824 12 V DC X
28 24 V DC X X
28 12 V DC X X X X
285 24 V DC X X X X
285 12 V DC X X
286 24 V DC X X
6024 24 V DC X X X X
6024 12 V DC X X
622 24 V DC X X
622 12 V DC X X
2821 24 V DC X
2821 12 V DC X
6021 24 V DC X
6021 12 V DC X
6022 24 V DC X X
6022 12 V DC X X X X
14 - 8605
english
282 24 V DC X X
282 12 V DC X X X X
284 24 V DC X X X X
284 12 V DC X X
602 24 V DC X X
602 12 V DC X X
If two current ranges of the control electronics are possible
choose the lower one.
Operating unit for Type 8605 Cable Head 667 89
RS22 module for Type 8605 Cable Head 667 840
RS485 module for Type 8605 Cable Head 667 841
RS22 module for Type 8605 DIN Rail 667 842
RS485 module for Type 8605 DIN Rail 667 84
Angle-entry plug M12, 4pin 784 01
Connecting lead M12, 4-pin, 5 metres long 918 08
Connecting lead M8 for serial communication RS22 or
RS485
918 718
cap set (for operating without control unit) 670 549
8605 - 15
english
The operating unit consists of an LCD and keys. It is used for displays and
settings of the Control Electronics, Type 8605.
4
2
15
76
Legend
1 Process value = Actual
value (of the coil current)
2 Setpoint = Setpoint (ofSetpoint (of
the coil current)
3 = active
= not active
4 Upper limit
5 Unit of the displayed
value
(s, Hz, %, mA, V)
6 Lower limit
7 LCD
Illustration 6-1: Operating unit
Key Display mode Configuration
mode
Selected and
confirmed menu
item
Switch over the display
value
PV [mA] process value
PV [%] process value
SP [%] Setpoint
TV [%] duty cycle
Scroll up
(selection)
Increment (in-
crease)
numerical values
Scroll down
(selection))
Decrement (de-
crease)
numerical values
sec
Enter configuration
mode
Confirm the
selected menu
item
Select and dese-
lect the individual
menu items
Switch between
main menu and
sub-menu items
e. g.: Out-VALV
Confirm set
values
16 - 8605
english
During operation of the Control Electronics 8605 without operating unit, the
operating status is indicated by two LEDs.
LED green
LED yellow
Legend
1 green: Device in operation
2 yellow: Current through valveCurrent through valve
Illustration 6-2: LEDs on version without operating unit
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 volt-
age signal (PWM) that is supplied to the solenoid coil of the proportional
valve (see Illustration 6-3: 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.
0 ... 5/10 V
0/4 ... 20 mA
standard
p1load
Illustration 6-3: 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 sig-
nals.
8605 - 17
english
Due to the inductivity of the coil, the rectangular time curve of the PWM volt-
age signals is not transformed into a corresponding current curve; instead
the coil current has a sawthooth-like „rounded“ time curve (see Illustration
6-4: Time curve of PWM voltage signal and coil current). The mean (effec-
tive) 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 6.3 Adjust-
ment 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
Illustration 6-4: 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 cur-
rent control system serves to compensate these thermal effects by corre-
sponding tracking of the pulse duty factor.
18 - 8605
english
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 (I1) and
the full flow rate is achieved at a current value slightly below the upper key
value (I2).
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 relation-
ship to the input signal (see Illustration 6-5: Current over standard signal).
I2
I1
I
2 % 100 %
Standard signal
Illustration 6-5: 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 Illustration 6-5 - to zero so that the full
•
•
8605 - 19
english
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
Illustration 6-6: 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
current
standard signal
Illustration 6-6: Ramp functionRamp function
The with superordinate controllers (PCs, etc.) is
possible via RS22 or RS485 interfaces using auxiliary modules (see also
chapter 5.4 Ordering Tables / Accessories).
20 - 8605
english
Interference with the system will result in an acute risk of injury.
Switch off the pressure before disconnecting lines and valves to which
the electronics are connected!
Interference with the system will result in an acute risk of injury.
Before starting work, be sure to switch off the supply voltage and secure
it to prevent restarting!
Observe all applicable accident prevention and safety regulations for
electrical equipment!
•
•
•
Take suitable measures to prevent unintentional operation or inadmissible
damage!
This work may only be carried out by specialist personnel using
appropriate tools!
Ensure that the process is restarted in a defined and controlled manner
after an interruption in the electrical or pneumatic power supply!
•
•
•
The electrical connection of the Controller Type 8605 in cable head version
is made via a 4-pin terminal strip inside the device.
Cable
Diameter
Cross-section
•
•
6 ... 8 mm
max. 0.75 mm2
Cable connections Cable gland or plug connector
M12, 4-pin
This manual suits for next models
12
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