Danfoss EKE 1A Installation Manual page 8

Stepper Motor Output
• All valves are driven in a bipolar mode with a 24 V supply chopped to control the current (Current driver).
• The stepper motor is connected to the "Stepper Valve" terminals (see terminal assignment) with a standard M12
connection cable.
• To configure stepper motor valves other than Danfoss stepper motor valves, the correct valve parameters must
be set as described in the Valve configuration section (see manual for details).
• The default valve setting in EKE 1A is: none.
• The correct valve must be defined in "Valve configuration", i.e. parameter I067. An overview of valve types is
given in the "Parameter identification" section.
Valve Cable Connection
Stepper valve connector
A1
A2
B1
B2
Not connected
• All valves are driven in a bipolar mode with a 24 V supply chopped to control the current (Current driver).
• The stepper motor is connected to the "Stepper Valve" terminals (see terminal assignment) with a
standard M12 connection cable.
• To configure stepper motor valves other than Danfoss stepper motor valves, the correct valve parameters
must be set as described in the Valve configuration section by selecting user defined valve.
Guideline for long M12 cables on Danfoss stepper motor valves
• Long cables will lead to degradation of performance.
• You can overcome this degradation by changing the settings for the valve driver. This guideline is based on
the cable type being the same type as the standard Danfoss stepper motor cable.
Recommended wire size and cable distance between EKE controller and stepper motor valve
Cable length
Wire diameter
Parameter setting for long M12 cable
Product
ETS 12C - ETS 100C
KVS 2C - KVS 5C
ETS 12.5 - ETS 400
KVS 15 - KVS 42
CTR 20
CCMT 2 - CCMT 8
CCM 10 - CCMT 40
ETS 6
CCMT 0
CCMT 1
CCMT 16 - CCMT 42
© Danfoss | Climate Solutions | 2023.10
ETS/KVS/CCM/ CCMT/CTR/ CCMT L
(Using Danfoss M12 Cable)
White
Black
Red
Green
-
1 m – 15 m
0.52 / 0.33 mm
2
(20 / 22 AWG)
0 m – 15 m cable
Use default values
Use default values
Use default values
Use default values
Use default values
Use default values
15 m – 30 m
0.33 mm
2
(20 AWG)
15 m – 30 m cable
Update following parameter
I028 Valve drive current= 925 mA peak
I028 Valve drive current= 200 mA peak
I028 Valve drive current= 270 mA peak
I028 Valve drive current= 270 mA peak
I028 Valve drive current= 400 mA peak
I028 Valve drive current= 450 mA peak
ETS 8M Bipolar ETS 6
Orange Orange
Yellow Yellow
Red Red
Black Black
- Grey
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