Danfoss EKE 1A User Manual page 40

Superheat controller and stepper valve driver, Type EKE 1A, 1B, 1C, 1D
6 Con guration
6.1 Driver Mode
In this mode The EKE 1x is acting as stepper motor valve driver, where master is commanding the valve opening
degrees to the EKE controller. In this mode, no sensor is needed as we are not doing any superheat control. The
control signal can be:
• Analog signal e.g., 0 – 10 V or 4 – 20 mA
• Bus communication via RS485 (Modbus RTU)
Table 18: Driver mode
EKE
Applicable
Voltage signal
Current signal
Bus
6.1.1 Driver Mode using analog signal
The signal can be used to drive the valve's opening degree to a desired position. This feature is used to drive the
stepper motor valve to the desired level.
Figure 54: Driver Mode using analog Signals Parameters
Valve Opening
Degree %
Analog Input Signal
100% OD
0% OD
0 V
4 mA
Table 19: Driver Mode using analog Signals Parameters
Parameter Function
RI02 Operation mode
I091 Driver reference con guration for 1B, 1D
I033 Driver reference con guration for 1C
I034 Ext ref voltage low
I035 Ext ref. voltage high
I036 Ext ref. current low
I037 Ext ref. current high
 WARNING:
EKE 1A can implement Voltage to OD only
© Danfoss | Climate Solutions | 2024.08
1A 1B
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Analog Input Signal
10 V
20 mA
Voltage signal
Current signal
1C
Description
1 = valve Driver, select 1 to operate as valve driver
0 = Voltage to OD
0 = Voltage to OD
3 = Current to OD
If I091 or I033 = 0, de ne min reference voltage
If I091 or I033 = 0, de ne max reference voltage
If I033 = 3, de ne min reference current
If I033 = 3, de ne max reference current
BC398828796060en-000103 | 40
1D
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