Burkert 1094 Series User manual

Operating Instructions
Bedienungsanleitung
Instructions de Service
Type 1094
Control electronics for Proportional valves
Ansteuerelektronik für Proportionalventile
Electronique de pilotage pour les vannes proportionelles

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous resérve de modification techniques.
© 2002 Bürkert Werke GmbH & Co. KG
Operating Instructions 0507/12_EU-ML_00803037

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Contents:
1 GENERAL SAFETY INSTRUCTIONS 2
2 SYMBOLS USED 2
3 TECHNICAL DATA AND FUNCTION OF THETYPE
1094 CONTROL ELECTRONICS 3
4 INSTALLATION AND SETTING INSTRUCTIONS 7
4.1 Connection combinations of valves and electronics 7
4.2 Setting up the electronics 8
4.2.1 DIP-switches 8
4.2.2 Setting the DIP Switches for the 1094 PHR type 9
4.2.3 DIP switches settings withType 1094 PHR
(Order no. 154463) 10
4.2.4 Setting the DIP switches for the 1094 PMRType 10
4.2.5 Connecting the electronics to the valve 11
4.2.6 De-activation of zero-point switching using the
DIP switches 11
4.2.7 Start of flow 12
4.2.8 Maximum flow 12
4.2.9 Ramp 13
4.2.10 Zero point switch-off 13
4.3 Standard setting values 14
4.4 Connection plan for Type 1094-PHR standard rail electronics 16
4.5 Connection plan for Type 1094-PMR cable head electronics 17
Control electronics
Type 1094
for Propotional valves of the types
2821, 2832, 2834, 2836, 6021, 6022, 6023, 6024, 6223

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1 GENERAL SAFETY INSTRUCTIONS
To ensure that the devices function correctly, and that they have a long service
life, please comply with the information in these Operating Instructions, as well
as the Application Conditions and the permissible values that are specified in the
data sheets for the proportional valve used, and for the type 1094 electronic
system:
•when planning the application of the device, and during its operation, observe the
general technical rules;
•observe the relevant accident prevention and safety regulations applicable for
electrical equipment throughout the operation, maintenance and repair of the device;
•note that lines and valves must not be disconnected from systems that are under
pressure; always switch off the voltage supply before working on the system;
•take suitable measures to prevent unintentional operation or impermissible
impairment;
•if these instructions are ignored, no liability will be accepted from our side, and the
guarantee on the device and on accessories will become invalid.
NOTE Approvals such as Ex, UL, UR, CSA, DVGW etc., will be
indicated on the rating plate, or by a special label.
2 SYMBOLS USED
In these Operating Instructions, the following symbols are used:
indicates a working step that you will have to carry out
ATTENTION! indicates information which must be followed. Failure to do
this could endanger your health or the functionality of the
device
NOTE indicates important additional information, tips and
recommendations

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3 TECHNICAL DATA AND FUNCTION OF THE TYPE 1094
CONTROLELECTRONICS
• Type 1094 control electronics for driving the Type 6021, 6022, 6023, 6024, 6223,
2821, 2822, 2832, 2834 and 2386 proportional valves
• specially designed for these valve types: ensures an optimal function of these valve
types
• converts an external standard signal into a PWM signal, with which the opening of the
valve can be continuously varied
• the frequency of the PWM signal can be adjusted to match the valve used
• standard signal inputs can be selected from 0-10V, 0 - 20 mA or 4 - 20 mA
• can be delivered in three designs:
a) Type 1094-24/=-PHR-E06-000
- separate electronics in a housing for standard rail mounting to
DIN EN 50 022
- can be used for all types of valve listed (except 2822) and for different standard
signal inputs
- selection of the valve type and the standard signal inputs via DIP switch
(see. 4.2)
b) Type 1094-24/=-PHR-... (Order no. 154463)
- separate electronics in housing for mounting on standard rail to DIN EN 50 022
- may be used for proportional valve type 2822
- choice of standard signal input
c) Type 1094-24/=-PMR-...
- plug-in design: integrated into the cable plug housing
- suitable for valve types 6022, 6023, 6223, 6024, 2832, 2834 and 2386
- quote desired standard signal input when ordering (component insertion variants)
- depending on the type of valve, two different PWM frequencies can be selected

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• by means of the two potentiometers R1and R2(see connection diagram), these key
values of the coil current can be optimally adjusted to the pressures in the respective
applications (see 4.3):
- zero-point potentiometer R1for the adjustment of the coil current I1for the lower
value of the control signal, and thereby the start of valve opening
- amplification potentiometer R2for setting the gradient of the I(U) characteristic
and thereby the maximum current I2or the attainable flow (for maximum standard
signal, e.g., 10V) (see Diagram 1)
• the zero-point switch-off guarantees that the valve will close completely with an input
signal < 2% of the maximum value; the coil current will thereby be electronically set to
zero for input signals below this threshold (e-g., 0.2 V for standard signal input 0 ..
10V) (Diagram 1);
this zero-point switch-off can be de-activated via a DIP switch, e.g., for the simplest
settings of the start of opening of the valve using potentiometer R1
• integrated current regulation for compensation of the coil heating
• continuous variation of the opening of the valve, and thereby the fluidic output
dimension (e.g., flow), is possible by changing the effective coil current (via the
switching relationship of the output PWM signal);
the current values at which the valve starts to open (I1) or at which it is just fully
opened (I2) depend on the pressure relationships in the actual application
Diagram 1: I (U)
characteristic

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• LED for displaying the operational status of the valve
LED lights up for - current flow through the valve solenoid
LED does not light up for - no operating voltage
- input signals below 2% and zero-point switching
activated
• Operating voltage: 24 VDC
• Protection class: IP 65 for Type 1094-PMR plug-in control electronics (cable plug
electronics)
• ramping potentiometer R3for the adjustment of a delay time within the range of 0 to
10 s, in order to dampen sudden changes of the set-value (increasing and
decreasing ramps have the same delay)
• monitor output for testing the momentary coil current (1 mV monitor signal = 1 mA coil
current); this current is, for example, useful when setting the current values I1and I2
(Par. 4.2)
NOTE
ATTENTION!
We recommend the use of the Bürkert Power Supply Type
1610 for the voltage supply, as this has been specially
designed for the Type 1094 electronics.
If you make use of another power supply, maintain the
operating voltage range between 24 V to and a maximum of
28V, together with a residual ripple < 10%.
If you are using a switching power supply, take into
consideration their tendency to oscillate with inductive loads
(e.g., the solenoids in the valves).

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Drive electronics Type 1094-PHR (Order no. 154463) in
connection with proportional valve Type 2822
For operation with Type 2822, one should work exclusively with
the drive electronics Type 1094 in the design PHR (Order no.
154463).
ATTENTION!
Proportional valve Type 2822 has a different construction to the valve types listed
previously in these instructions. In particular, the valve armature is supported by shaped
springs, so that the slip-stick effect is absent in this device.
In principle, the valve can be driven both with a variable DC (e.g. 0...24V DC, no noise in
this case) or a PWM signal. In the latter case, the PWM signal has only the function of
varying the magnetic force via the pulse-duty factor. A dither motion, as with a core
supported by a sliding ring, does not have to be generated.
Since the solenoid armature with Type 2822, because of its design, has a higher
dynamic than the other proportional valves, the frequencies available with the standard
versions of the drive electronics Type 1094 are too low; in operation, they would lead to
increased noise and a poorly defined opening behaviour. A version of the electronics
Type 1094, specially developed for Type 2822 in the design PHR (Order no. 154463),
enables higher PWM frequencies to be set that are adapted to this valve.

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Vale type Bürkert appliance socket Control electronics
6021 2506 1094-PHR
6022, 6023, 6024, 6223
with tag connectors
2508 1094-PHR
none 1094-PMR
2821 1051 1094-PHR
2822
with wires
none 1094-PHR*
2822
with connector flags
1051 1094-PHR*
2832, 2834, 2836
with tag connectors
1050 1094-PHR
none 1094-PMR
4 INSTALLATION AND SETTING INSTRUCTIONS
4.1 Connection combinations of valves and electronics
* For proportional valve Type 2822, use only drive electronics Type 1094-
PHR with Order no. 154463
NOTE The use of the Bürkert Type 1610 power supply is
recommended for all combinations!
When connecting the PHR electronics using the appliance
sockets 2506, 2508, 1050 or 1051, note that the cable length
must be less than 50 m; with longer cables, the 0 - 10V control
will no longer produce a full opening of the valve! This can also
apply to other signals.
The direction of the cable run can be changed in 4x 90° steps
when using the cable plug electronics type 1094-PMR.

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Carefully insert the blade of the screwdriver
under the manifold, and lever it out
(Diagram 2).
Turn the manifold to the desired position.
Insert the manifold into the housing until it
latches in.
Diagram 2: Turning the manifold
4.2 Setting up the electronics
4.2.1 DIP-switches
Select the PWM frequency and the desired standard signal input (only applies to the
standard rail electronics Type 1094-PHR) corresponding to the listed valve types.
NOTE The standard signal input must be determined before connecting
the operating voltage.
ATTENTION!
Only work on the equipment when all voltages have been
removed!
Ensure that the cables ends do not become twisted!
The apparatus socket may only be pushed onto the
connector flags with the fixing screw assembled.

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DIP-Switch Standard Signal Input
0 - 10 V 0 - 20 mA 4 - 20 mA
S 1-1 OFF ON ON
S 1-2 OFF ON ON
S 1-3 ON ON OFF
S 1-4 ON ON OFF
S 1-5 OFF OFF ON
4.2.2 Setting the DIP Switches for the 1094 PHR type
Setting at delivery
PWM-Frequency
DIP-Switch low high
S 1-6 OFF ON OFF ON
S 1-7 OFF OFF ON On
suitable for
valve type
2834, 2836, 6023,
6024, 6223 (DN 20)
2832, 2834, 6022,
6023, 6024,
6223 (DN 10, 13)
2832
6022
2821
6021
Zero-point switch-off
DIP-Switch aktivated de-aktivated
S 1-8 OFF ON

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Settings for DIP switches S 1-1 through S 1-5 and S 1-8: see 4.2.2
4.2.3 DIP switches settings with Type 1094 PHR
(Order no. 154463)
S 1-6 S1-7 PWM-Frequency
OFF OFF 1000 Hz
ON OFF 1250 Hz
OFF ON 3000 Hz
ON ON 6000 Hz
4.2.4 Setting the DIP switches for the 1094 PMR Type
Setting at delivery
PWM-Frequency
DIP-Switch low medium
S 1 OFF ON
suitable for valve
type
2834, 2836, 6023, 6024,
6223 (DN 20)
2832, 2834, 6022, 6023,
6223 (DN 10, 13)
Zero-point switch-off
DIP-Switch aktivated de-aktivated
S 2 OFF ON
Generally, each of the four combinations of dip-switch settings can be used.
With the lowest frequency, the lowest hysteresis is obtained, the PWM
signal, however, is still slightly audible, whereas with the highest frequencies
practically no noise is perceptible.The sensisitivity and hence the excellent
functionality in closed-loop control applications, however, is guaranteed with
all the four frequency settings.

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NOTE With the setting of the PWM frequeny, take into account the diffe-
rent dynamics of the spring mass systems of the valves;
in principle, you can drive the valve with any of the control
frequencies listed above - the values given provide the optimum
with regard to hysterisis and noise emission (in general, the rule
is: lower frequency = less hysterisis, but more noise
development).
If you notice an oscillation tendencyof the system in an
application with high medium pressure, it is recommended that
you use the next higher control frequency as shown in the table
above.
Whenever possible, connect two earth cables to Terminal 3
when wiring the Type 1094-PMR cable plug electronics (one
cable for the earthing of the operating voltage, the other for the
earthing of the standard signals and monitor signals).
When screwing the appliance socket to the coil, make sure that
the flat seal is well seated!
NOTE
4.2.5 Connecting the electronics to the valve
Apply the operational pressure.
Connect the cables to the valve and the electronics according to the connection
diagram.
Apply the operating voltage.
4.2.6 De-activation of zero-point switching using the DIP
switches
Cable plug electronics Type 1094-PMR DIP switch S 2 Setting ON
Standard rail electronics Type 1094-PHR DIP switch S 1-8 Setting ON

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4.2.7 Start of flow
Leave the standard signal open
or
apply the respective minimum value (0V; 0 mA or 4 mA).
Cable plug electronics type 1094-PMR Terminal 4 Standard signal input
Terminal 3 Earth
Standard rail electronics Type 1094-PHR Terminal AN 1-4
Standard signal input
Terminal AN 1-5 Earth
Set potentiometer R3to the left-hand stop (delay = 0 s).
Using potentiometer R1, set the current I1so that this just begins to lift the core from
the valve seat (start of flow).
Repeat Points 4.2.6 and 4.2.7 with the 4 - 20 mA standard signal until the desired
values are reached, as the amplification potentiometer R2has a slight feedback effect
on the current value at the lower control point (4 mA).
4.2.8 Maximum flow
Set the standard signal to its maximum value (10V or 20 mA), and, using
potentiometer R2, set the current value I2so that the maximum flow rate is just
reached.
NOTE Turn potentiometer R2clockwise until the flow rate no longer
increases, and then turn back until the flow rate begins to sink
again!
The setting of the switch for the de-activation of the zero-point
switch-off has no effect on the setting of the maximum flow rate.
The zero-point potentiometer R1also affects the maximum flow
rate, and for this reason always set the flow rate start first!
NOTE Turning clockwise increases the flow!

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4.2.10 Zero point switch-off
Set the switch for the de-activation of the zero-point switch-off back to the desired
position (see connection diagram).
The setting of the electronics is thereby completed,
and the valve is ready for use.
Default factory setting: no delayNOTE
4.2.9 Ramp
Using potentiometer R3(left stop = no delay), set the desired ramp (delay).

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4.3 Standard setting values
Monitor signal in mV1at
Valve
type
DN Start opening of valve
(I1/Potentiometer R 1)
Full of opening of valve
I2/Potentiometer R2)
6021 1.6 135 165
6022 2 260 300
6022 4 210 300
6023 4 420 530
6023 6 340 530
6024 8*** 290 500
6024 10*** 250 500
6024 12*** 160 500
6223 10 90 300
6223 13 80 330
6223 20 200 530
2821 1,6 125 185
2822 0,4540 65
2822 0,8 80 185
2832 2 285 350
2832 4 175 350
2832 EEx* 4 90 200
2834 4 440 650
2834 6 400 650
2836 10 480 1100***
2836 12 430 1100***
1 1 mV monitor Signal = 1 mA coil current
2pre-pressure 0,2 bar, pressure drop 0,2 bar
3pre-pressure 0,5 bar, pressure drop 0,5 bar
4 In the case of Type 2836, because of the low coil resistance, an upper current value of I2>1100 mA
may also be set with the potentiometers. This should be avoided under all circumstances, since the
electronics are not dimensioned for such currents and could be destroyed.
5Coil 1 W
With a pre-pressure of p1= 1 bar and a flow free of back-
pressure (∆p = 1 bar), we recommend the following flow settings
as standard values, which you can check on the monitor:
NOTE

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ATTENTION! The valve will not be damaged if a higher coil current than
the value I2given in the right-hand column of the table is
set with a maximum control signal. It will, however, cause
little or no increase in the flow rate , and will impair the
linearity of the characteristic.
In continuous use, it is possible that this increased current
value cannot be maintained by the current regulator, as a
result of the resistance increase resulting from the
warming of the coil.
With valve types 6021, 6022, 6023, 6024, 2821, 2832, 2834
and 2836, the current value I1for the start of opening of the
valve reduces with increasing pre-pressure;
The current value I2for the full opening of the valve decreases
with increasing pressure drop across the valve.
In the servo-assisted valve Type 6223, the current value I1for
the start of opening of the valve increases with increasing pre-
pressure;
The current value I2for the full opening of the valve increases
with increasing pressure drop across the valve.
NOTE
Connection for the monitor signal:
Cable plug electronics type 1094-PMR Terminal 5 Monitor signal
Terminal 3 Earth
Standard rail electronics type 1094-PHR Terminal AN 2-5 Monitor signal
Terminal AN 1-3 Earth

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4.4 Connection plan for Type 1094-PHR standard rail
electronics
Connection terminals
AN 1
1 Operating voltage (24 - 28 V DC)
2 Earth (operating voltage)
3 Earth (monitor signal)
4 Standard signal input
5 Earth (standard signal input)
AN 2
1 Protective earth (PE, from power
supply)
2 Protective earth (PE, to valve)
3 Valve
(polarity not prescribed)
4 Valve
5 Monitor output
Setting potentiometer
R1minimum flow (zeropoint)
R2maximum flow (amplification)
R3ramp time (rise and fall identical)
LED display
L1lights up when current is flowing through the solenoid

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4.5 Connection plan for Type 1094-PMR cable head
electronics
Connection terminals
1 Protective earth (PE, from power supply)
2 Operating voltage (24 - 28 V DC)
3 Common Earth
4 Standard signal input
5 Monitor output
Setting potentiometer
R1minimum flow (zeropoint)
R2maximum flow (amplification)
R3ramp time (rise and fall identical)
Switches and display
S1Switch for switching over the control frequency
a (on) medium frequency
b (off) low frequency
S2Switch for de-activating the zero-point switch-off
a (on) zero-point switch-off de-activated
b (off) zero-point switch-off activated
LED display
lights up when current is flowing through the solenoid

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NOTES