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Connection overview: EKE 1P
ANALOGUE / DIGITAL INPUT
RS-485
ANALOG / DIGITAL INPUT
Stepper Valve Module
Superheat controller
EKE 1P
PWR 24V
Vbat
STEPPER VALVE
STEPPER VALVE
Technical speci cations
Power supply:
EKE has galvanic isolation by switch-mode power supply. 24 V AC ± 20 %, 50/60 Hz.
Maximum power consumption: 18 VA. Input voltage rating (DC): 24 V DC ± 20%, 15 W.
I/O
Type
Analogue
Voltage
inputs
PT1000
Auxiliary
Supplies
Voltage
Digital inputs
free
contacts
Digital output
Relay
Bipolar /
Stepper motor
unipolar
Battery backup
RS-485 RTU
Communication
CAN
* Only used in application 1
2 | AN31542506734402-000501
CAN - RJ
CAN RJ
CAN RJ
DIGITAL OUTPUT
DIGITAL OUTPUT
No. Speci cation
Max. 15 V input voltage
Do not connect voltage sources to unpowered units without limiting the current to analogue inputs (overall
80 mA). Open circuit HW diagnostics available for voltage input on: AI4
AI3*
0 – 5 V ratiometric
2
AI4
0 – 5 V, 0 – 10 V
2
AI1*, AI2*
5 V +
1
Sensor supply: 5 V DC / 15 mA, overload protection approximately 150 mA
DI1*, DI2
Steady current minimum 1 mA
Cleaning current 100 mA at 15 V DC
2
On: RIL < = 300
O : RIH > = 3.5 k
C1-NO1*
Normally Open: 3 A General purpose, 250 V AC, 100 k cycle
1
Normally Open: 3 A Inductive (AC-15), 250 V AC, 100 k cycle
Normally Closed: 2 A General purpose, 250 V AC, 100 k cycle
Stepper valves: A1, A2, B1, B2
Bipolar and unipolar stepper motor output:
- Danfoss CCMT 3L - CCMT 8L / CCMT 0 - CCMT 42 / CCM 10 - CCM 40 / ETS 6 - ETS 400 / CTR 20
Other valves:
- speed 10 – 400 pps
1
- drive mode 1/8 microstep
- max. peak phase current: 1.2 A (848 mA RMS)
- max. drive voltage 40 V
- max. output power 12 W
VBATT: 18 – 24 V DC (24 V DC recommended):
- max. battery current: 850 mA at 18 V
1
- battery alarm will be activated below 16 V DC and above 27 V DC
RS-485*
Galvanic isolation
1
No built-in termination
CAN - RJ
Application 1: Connect directly to AK-PC
1
Application 2: Connect directly to graphical display, MMIGRS2. Activate the termination on the graphical display.
ENGLISH
Valve connection
CCMT/ETS/CCM
ETS 6
White
Orange
Black
Yellow
Red
Red
Green
Black
Application 1 driver con guration
AI4 open circuit or connected to 0V (COM): high-pressure valve driver
AI4 connected to 5V+: receiver valve driver
Recommended wire size and cable distance between EKE
controller and stepper motor valve
Cable length
1 – 15 m
Wire diameter
0.52 / 0.33 mm (20 / 22 AWG)
EKE 1P
A1
A2
B1
B2
© Danfoss | DCS (vt) | 2020.03
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