Power And Signal Sharing; Sharing Power Sources - Danfoss EKE 1A User Manual

Superheat controller, Type EKE 1A, 1B, 1C, 1D

3.7 Power and signal sharing

3.7.1 Sharing Power Sources

The EKE 1x series can share common power supplies with multiple controllers because the power supply input of
the EKE is galvanically isolated from the outputs. The external power supply must have enough power rating
Watt/VA to operate multiple EKEs and most importantly enough power to run the valves. The Battery backup is an
optional feature. If Battery backup is connected to EKE terminals, the EKE will close the stepper motor if the
controller losses its supply voltage
1. A special attention is needed on sharing both external power supply as well as battery backup. it is not allowed
to share AC power supply and DC EKE 2U backup battery simultaneously with multiple controllers
2. In case both DC power supply and battery are shared between several units, it is recommended to have the
negative poles of battery and power input shorted together at each unit. Such solution requires EMC test to be
conducted on the final equipment by customer
Figure 13: Power sharing from EKEs
Superheat controller
EKE 1x - 080G5xxx
EKE 1C
AC
Shared power supply type
DC
Shared battery back up
Figure 14: Sharing a DC source and EKE 2U module with multiple EKEs
Superheat controller
EKE 1x - 080G5xxx
© Danfoss | Climate Solutions | 2022.06
CAN RJ CAN RJ
Superheat controller
EKE 1x - 080G5xxx
EKE 1C
CAN RJ CAN RJ
Superheat controller
EKE 1x - 080G5xxx
CAN RJ CAN RJ
Superheat controller
EKE 1x - 080G5xxx
EKE 1C
CAN RJ CAN RJ
Superheat controller
EKE 1x - 080G5xxx
CAN RJ CAN RJ
CAN RJ CAN RJ
BC398828796060en-000101 | 16