Danfoss EKE 1A User Manual page 16

Superheat controller and stepper valve driver, Type EKE 1A, 1B, 1C, 1D
Figure 13: Sharing a DC source and EKE 2U module with multiple EKEs
EKE XX
Superheat controller
EKE 1x - 080G5xxx
-
DC Power
supply
+
Danfoss recommends using EKE 2U as the preferred battery backup device, for more details check the EKE 2U
datasheet. The battery backup device power rating Watt/VA must match the valves requirements
 NOTE:
• The power supply terminals must be connected at every Unit.
• The battery voltage must not be connected from main power supply connected to EKE.
• A battery voltage lower than 16.5 V and higher than 27V will trigger the battery alarm.
• It is not allowed to shared AC power supply and DC backup battery simultaneously with multiple controllers.
• EKE 2U can only support a maximum of two valves for emergency closing, or only one valve in case the valve used
consumes higher power. See EKE 2U documents for more details.
3.7.2 Sharing input signal
The EKE cannot share digital inputs.The digital inputs (voltage free Contacts) cannot share the same signal directly
or be connected to external power supply.To share a digital signal between multiple digital inputs, a special circuitry
is needed. For example, Each DI can be provided with its own relay (or optocoupler) that must withstand 100mA
impulses at15V. EKE 1 series (Except 1C) can share analog input between multiple controllers
© Danfoss | Climate Solutions | 2024.08
SoH Signal
EKE XX
CAN RJ CAN RJ
CAN RJ CAN RJ
Superheat controller
EKE 1x - 080G5xxx
SHARING EKE 2U WITH 2 CONTROLLERS
EKE 2U
Backup power module
EKE 2U - 080G5555
BC398828796060en-000103 | 16