Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 19
Power supply
PLC
D0
D1
COM
EKE 1
D1
COM
EKE 1
D1
COM
EKE 1
+
Relay
Relay
Optocoupler
R
Danfoss
80G340.10
6.5 Shared DI inputs EKE controller is provided with voltage free
contacts. DI terminals must not connect with
external power supply. DI cannot be shared.
IF DI signal requires sharing , a work-around
is to provide each DI with its own relay
(or optocoupler). Relay (or optocoupler)
output – which is connected to EKE DI and
EKE COM - must withstand 100mA
impulses at15V.
6.6 Sharing power supply
and battery back up
The power supply of EKE is galvanically separated from the outputs.
This gives a benet for EKE to share common power supplies with multiple controllers.
Battery back up 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. 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.
The power supply from the common backup power source can be shared with multiple EKE
controllers, but make sure that the external power supply has enough power Watt/VA to operate
multiple controllers.
A special attention is needed on sharing both external power supply as well as battery backup .
Strictly speaking, it is not allowed to shared AC power supply and DC backup battery
simultaneously with multiple controllers. In case both DC power supply and battery are shared
between several units , the safest setup is 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 nal
equipment by customer.
Warning:
The battery voltage must not
be connected from terminals
of EKE main power supply.
EKE 1C
EKE 1C
EKE 1C
Danfoss
80G338.10
Shared power supply type
AC
Shared batter
y back up DC
COM
5V+
DI2
DI1
COM
AI4
AI3
AI2
DI3
COM
D–
D+
RGND
CAN RJ
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
COM
5V+
DI2
DI1
COM
AI4
AI3
AI2
DI3
COM
CAN RJ
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
COM
5V+
DI2
DI1
COM
AI4
AI3
AI2
DI3
COM
D–
D+
RGND
CAN RJ
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
COM
5V+
DI2
DI1
COM
AI4
AI3
AI2
DI3
COM
CAN RJ
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
COM
5V+
DI2
DI1
COM
AI4
AI3
AI2
DI3
COM
D–
D+
RGND
CAN RJ
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
COM
5V+
DI2
DI1
COM
AI4
AI3
AI2
DI3
COM
CAN RJ
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
Danfoss
80G295.10
–/~
+/~
–/~
+/~
Superheat controller
EKE 1x - 080G5xxx
Superheat controller
EKE 1x - 080G5xxx
Superheat controller
EKE 1x - 080G5xxx
Warning:
It is strictly not allowed to
shared AC power supply and
DC backup battery
simultaneously with multiple
controllers
EKE accepts shared analogue voltage signal.
Ext ref signal i.e 0 -10 V can also be shared in EKE 1A and 1B
6.4 Shared input signal