User Guide | Stepper Valve Extension Module, Type EKE 1P
© Danfoss | DCS (vt) | 2020.03
BC320219567793en-000201 | 13
Connections
Technical specifications
CO
M
5V
+
DI
2
DI
1
CO
M
AI
4
AI
3
AI
2
AI1
CO
M
D
–
D+
RGND
CAN RJ
–/
~
+/
~
GN
D
Bat+
A1
A2
B1
B2
NO
1
C1
NC
1
CO
M
5V+
DI2
DI1
CO
M
AI
4
AI
3
AI
2
AI
1
CO
M
D
–
D+
RGND
CAN RJ
ANALOG / DIGITAL INPUT
CAN - RJ
RS-485
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1
NC1
PWR 24V
Vbat
STEPPER VALVE
DIGITAL OUTPUT
Superheat controller
EKE 1P
ANALOGUE / DIGITAL INPUT
DIGITAL OUTPUT
STEPPER VALVE
Stepper Valve Module
Danf
oss
80G398
I/O
Type
No. Specification
Analogue inputs
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
Voltage
2
AI3
*
0 – 5 V ratiometric
AI4
0 – 5 V, 0 – 10 V
PT1000
2
AI1
*,
AI2
*
Auxiliary
Supplies
1
5 V +
Sensor supply: 5 V DC / 15 mA, overload protection approximately 150 mA
Digital inputs
Voltage free
contacts
2
DI1*, DI2
Steady current minimum 1mA
Cleaning current 100 mA at 15 V DC
On: RIL < = 300 Ω
Off: RIH > = 3.5 k Ω
Digital output
Relay
1
C1-NO1*
Normally Open: 3 A General purpose, 250 V AC, 100 k cycle
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 motor
Bipolar /
unipolar
1
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
- 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
Battery backup
1
VBATT:
18 – 24 V DC (24 V DC recommended)
- Leakage: <15 μA @30 V DC
- max. battery current: 850 mA at 18 V
- battery alarm will be activated below 16 V DC
Required power to do one closing of stepper valve:
ETS 6
: 110 J / 30 V mAh
ETS 12.5 - ETS 400
: 60 J / 17 V mAh
KVS 15 / KVS 42
: 60 J / 17 V mAh
ETS 12C - ETS 100C
: 55 J / 15 V mAh
KVS 2C / KVS 5C
: 55 J / 15 V mAh
CCMT 2 - CCMT 8
: 60 J / 17 V mAh
CCMT 16 - CCMT 42
: 175 J / 49 V mAh
CCMT 3L - CCMT 8L
: 60 J / 17 V mAh
CTR 20
: 60 J / 17 V mAh
Communication
RS-485 RTU
1
RS-485*
Galvanic isolation
No built-in termination
CAN
1
CAN – RJ
Application 1: Connect directly to AK-PC
Application 2: Connect directly to graphical display, MMIGRS2. Activate the termination on the graphical display.
* Only used in application 1
Valve connection
Application 1 driver configuration
Recommended wire size and cable distance between
EKE controller and stepper motor valve
CCMT/ETS/CCM
ETS 6
EKE 1P
White
Orange
A1
Black
Yellow
A2
Red
Red
B1
Green
Black
B2
AI4 open circuit or connected to 0 V (COM): high-pressure valve driver
AI4 connected to 5 V+: receiver valve driver
Cable length
1 – 15 m
Wire diameter
0.52 / 0.33 mm2 (20 / 22 AWG)
