Danfoss EKE 1A User Manual

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)
Figure 55: Driver mode
EKE
1A
1B
1C
1D
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 56: Driver Mode using analog Signals Parameters
Danfoss 80G8271.01
10 V
Analog Input Signal
Voltage signal
Current signal
Analog Input Signal
Valve Opening
Degree %
0 V
100% OD
0% OD
20 mA4 mA
Table 21: Driver Mode using analog Signals Parameters
Parameter
Function
Description
RI02
Operation mode
1 = valve Driver, select 1 to operate as valve driver
I091
Driver reference
conguration for 1B, 1D
0 = Voltage to OD
I033
Driver reference conguration for 1C
0 = Voltage to OD
3 = Current to OD
I034
Ext ref voltage low
If I091 or I033 = 0,
dene min reference voltage
I035
Ext ref. voltage high
If I091 or I033 = 0,
dene max reference voltage
I036
Ext ref. current low
If I033 = 3,
dene min reference current
I037
Ext ref. current high
If I033 = 3,
dene max reference current
 WARNING:
EKE 1A can implement Voltage to OD only
6.1.2 Driver Mode using Communication Bus
Driver Mode using Communication Bus
The opening degree of a stepper valve can be operated manually between 0% and 100% OD via communication
bus.
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 40

Danfoss EKE 1A Specifications

General

Brand	Danfoss
Model	EKE 1A
Category	Controller
Language	English