Danfoss EKE 2U Installation guide
ENGINEERING
TOMORROW
Installation guide
Back up power module
Type EKE 2U
Introduction
EKE 2U module is an optional energy storage device. The module can provide enough energy
during power failure to the stepper controller to ensure closure of the electronic valves. It can be
080R9346
used with one or two controllers depending on the application.
State of Health (SOH) function of EKE 2U gives feedback to controllers to detect the status of the
backup module and lets the controller know if the backup is Ready to use, Charging or Failed.
Power Failure signal (PF): This signal should be connected to controller only if the controller
cannot detect power failure by itself. Not required for EKE controllers.
Load Switch, EKE 2U can deliver power backup for 2 valves. While using more than 1 valve the
load switch can be changed to deliver more energy.
Compatible Controllers: Danfoss EKE series and MCX controllers. For other controllers, please
contact Danfoss.
Wiring Diagram
English
080R9346
More info
Power
24 V
+/~
-/~
LOAD SWITCH
Backup power module
EKE 2U - 080G5555
PF
SoH
–/~
+/~
SGND
RED
GREEN
+24 V
GND
SoH communication (optional)
Danfoss
–/~
+/~
COM
80G8287A.01
L
–/~
GND
D12
COM
5V+
DI2
DI1
COM
H
GND
Superheat controller
EKE xx - 080G5xxx
+/~
GND
Bat+A1A2B1B2
Bat+
CAN RJ
AI4
AI3
AI2
AI1
COM
NO1C1NC1
© Danfoss | Climate Solutions | 2021.09
AN325741621547en-000803 | 1
Info for UK customers only: Danfoss Ltd., 22 Wycombe End, HP9 1NB, GB
Dimensions in mm
EKE 2U
125
121
Weight: 233 gram
80
60
Technical specications
Nominal input voltage 24 V DC / 24 V AC
Input voltage range 20 - 40 V DC, 19 - 29 V AC
Frequency DC / AC 50 … 60 Hz + /-10%
Overvoltage capability < 42 V DC
Nominal input power DC: 15 VA, AC: 25 VA
Protection class II
Inrush current < 15 A
Standby current @ 24 V DC ~ 0.1 A
Nominal output voltage (U
Nominal output current (I
) 24.0 V DC ± 2%
NOM
) 2 A
NOM
Maximum output current on standby 30 mA
Current limiting 2.5 A ± 10%
Parallel connection for time increase yes
Series connection no
Capacitor charging current @ 24 V DC < 1 A
Charging time ~ 2.5 min from fully discharged state
Max Voltage / current at X2 (open collector) 24V / 8.5 mA
Ambient temperature during operation T
Storage temperature - 30 °C - + 70 °C
Humidity < 90 % rH, no condensation.
Environmental pollution Typ e 2
Protection degree IP 20
Altitude Up to 2000 m
Immunity to voltage Surges EN 61000-4-5 Level 3 in/out
Assembly On DIN rail
Overvoltage protection Category II
Lifespan >90000 hours (10 years) @ 35 °C and >3 years @ 50 °C
MTBF > 500.000 h @ 25 °C according to IEC 61709 / SN 29500
< 30 V AC
= -25 °C - + 60 °C
AMB
Level 2 signals
© Danfoss | Climate Solutions | 2021.09
AN325741621547en-000803 | 2
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