Kramp KRED-KA User manual

EN
FOR SOLENOID OPERATED PROPORTIONAL VALVES
UNIVERSAL ELECTRONIC DRIVER
TYPE KRED-KA
USER GUIDE
www.kramp.com

EN
2
03/2016Universal electronic driver type KRED-KA for solenoid operated proportional valves
UNIVERSAL ELECTRONIC DRIVER TYPE KRED-KA
FOR SOLENOID OPERATED PROPORTIONAL VALVES
KEY FEATURES
• Microcontroller design
• Independent adjustments (ramp up - ramp down)
• 3 digit led display
• Display and adjust actual values (current&voltage)
• Easy access to the menu setup
• Wide ramp time range
• Simple control with analog input, locally supplied reference voltage
• No heat sink required
• Electronic limiting circuit/short circuit proof
• Reverse polarity, command input protection
• Load can be connected and disconnected live
1 DESCRIPTION 2 TECHNICAL DATA
The driver controls one solenoid of a proportional valve.
His construction permits an easy assembly directly on the
ISO 4400 connection on the valve. By the use of two selectors
it is possible to easily configure all the parameters without
the need of special tools or programming devices.
A 3 digit led display shows all the necessaries informations.
Operating voltage: 9-36 V DC
Maximum output current: 3,00 A
Input signal: 0-5 V; 0-10V;
4-20 mA
Maximum ramp time: 99,5 s
Linearity: 40-450 Hz
Operating Temperature: -40 .. 75 °C
Protection grade: IP 65 *
Recommended cross section of wires: 0,5 .. 0,75 mm2
Mounting: DIN 43650-A/ISO4400 solenoid and cable
connector
* A cable with a circular cross section and outside diameter
of 4 .. 6 mm should be used for the electronics supply.
Only in this way the declared IP protection can be assured.
3SET-UP PROCEDURE
1. At power up, the display will show either the output current signal or the input signal (Default display setting shows the
output signal). The decimal point will be flashing.
2. Rotate SELECT to enter the set-up mode. Parameter abbreviation is indicated on the display
3. When you reach the setting you want to modify, rotate ADJUST up or down to the desired value.
4. To modify another setting, rotate SELECT again and repeat.
5. The Driver is fully functional during the set-up procedure with any adjustments effective immediately.
6. In order to write the new settings in the memory and return to normal mode of operation, rotate „SELECT“ until the
display shows „SR“ and then rotate „ADJUST“ from 0 to 1 or wait for 100 seconds.
7. If you do not want to save the new settings you have just modified, you must disconnect the Driver from the power supply
before the end of the 100 seconds to restore precious settings.
8. After saving parameters to memory, the decimal point will be flashing and the Driver display will be back showing either
the output current signal or input signal depending on your „di“ selection.
9. To start over completely, you can restore the factory settings by rotating SELECT to rFP and then rotate ADJUST up past
10 for the display to reset (NOTE for Step 9: you may have to adjust your Input Signal Setting again if you reset to factory
settings.)

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03/2016 Universal electronic driver type KRED for solenoid operated proportional valves
4 SETTING RANGES
Parameter Description Adjustable
range
Hi HIGH, Maximum Current Output 0,20 - 3,00 A
Lo LOW, Minimum Current Output (see note 1) 0,00 - 2,99 A
rUP RAMP UP, Time for Output to increase from min to max 0,0 - 99,5 s
rdn RAMP DOWN, Time for Output to decrease from max to min 0,0 - 99,5 s
Cdb COMMAND DEADBAND, Output disabled if command signal is less then deadband 0 - 5 %
dFr DITHER FREQUENCY 40 - 450 Hz
in INPUT SIGNAL SELECTION:
5 - Voltage signal
20 - Voltage signal
420 - Current signal
0 - 5 V
0 - 10 V
4 - 20 mA
di DISPLAYED SIGNAL FOR TROUBLESHOOTING:
0 - Command signal [V] or [mA]
1 - Output signal [A]
**Flashing decimal point is an indicator for present display mode**
- Fast flashing decimal point, several flashes per second indicates di=0
- Slow flashing decimal point, 1 per second indicates di=1
- No flashing decimal point or no decimal point indicates display in SETTING/ADJUST
SA SAVE SETTINGS
rFP RESET FACTORY PARAMETERS (see note 2)
Err ERROR DETECTION STATE, short circuit, reverse polarity protection and detection:
0 - Error 0 - No errors
1 - Error 1 - Overcurrent in driver likely due to short circuit in Solenoid
2 - Error 2 - Current exceeding 20 mA in 4-20 mA input mode
CLr CLEAR ERROR, clear driver or error state (see note 2)
NOTE 1 When adjusting the HI and LO parameters, note the HI parameter value cannot be adjusted
below the LO parameter value as well the LO parameter value cannot exceed the HI parameter
value.
NOTE 2 Adjust Parameter value up past 9 to operate this command setting
5 DIMENSIONS - MM (INCH)
20(0.79)M3
)75.1(04
)42.1(23
109(4.31)
)30.2(25
)02.0(5
)17.081
18(0.71)
312
ADJUST SELECT
REF
IN
+VDC
GND

EN
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03/2016Universal electronic driver type KRED-KA for solenoid operated proportional valves
6 SCHEMATICS
9-36 V
9-36 V
0-10V
0 V
+5 V
9-36 V
9-36 V
4-20 mA
9-36 V
4-20 mA
REF IN +VDC GND
2 13
IN
+VDC
GND
2
1
3
1 EXTERNAL INPUT SIGNAL CONNECTION
(”i n” set to ”10”)
2 POTENTIOMETER CONNECTION
(” in” set to ”5”)
3 RAMP UP & DOWN ONLY OPERATION
(” in” set to ” 5”)
4 EXTERNAL INPUT SIGNAL CONNECTION 4-20 mA
(” in” set to ”420 ”)
5 TWO WIRE TRANSMITTER INPUT CONNECTION 4-20 mA
(” in” set to ”420 ”)
Power supply
Fuse
Analogue
output
Power supply
Command
signal
Potentiometer
10k
Analogue
output
Command signal
Command signal
Command signal
Power supply
Power supply
Power supply Analogue
output
Command signal

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03/2016 Universal electronic driver type KRED for solenoid operated proportional valves
7 ADJUSTMENT
0% 3% 5% 25%
1,00
2,00
3,00
0,00
100 Hz 200 Hz
0 50 100
0.00
1.00
2.00
3.00
0
0.00
1.00
2.00
3.00
15
00
500
0
0 V
4 mA
3.00
2.00
1.00
5 or 10 V
20 mA
3.00
0.00
0 V
4 mA
2.00
1.00
5 or 10 V
20 mA
3.00
0.00
5 10
Adjustment of Maximum:
(High) / parameter „Hi“
Maximum Current output 0,20 - 3,00 A
Time[s] Time [s]
Command signal [V or mA]
Solenoid current [A]
Adjustment Ramp
(Ramp up) / parameter „rUP“
Time for Output to Increase from min to max, 0- 99,5 s
Adjustment Ramp
(Ramp down) / parameter „rdn“
Time for Output to Decrease from max to min0-99,5
s
Adjustment (Command deadband) / parameter „Cdb“
Output disabled if command signal less than deadband
0-5%of the maximum Command signal
DITHER FREQUENCY / parameter „dFr“
Frequency settable in a range of 40 -450 Hz
Command signal [V or mA] Time [ms]
Command signal [V or mA]
Solenoid current [A]
Solenoidcurrent [A] Solenoid current[A]
Solenoid current[A]
Solenoid current[A]
Adjustment of minimum
(Low) / parameter „Lo“
Maximum Current output 0,00- 2,99A