Danfoss EKE 1B, Installation Manual, Page: 8 / 15

© Danfoss | DCS (az) | 2018.06 DKRCC.PI.RS0.C6.02 | 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 1B 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
ETS Colibri / KVS Colibri/ ETS / KVS / CCM / CCMT / CTR
Danfoss M12 Cable White Black Red Green
ETS/KVS / CCM Pins 3 4 1 2
ETS Colibri® / KVS Colibri / CCMT / CTR/ Pins A1 A2 B1 B2
EKE terminals A1 A2 B1 B2
Pin designation used in above table are shown in the product data sheet.
ETS 6
Wire color Orange Yellow Red Black Gray
EKE terminals A1 A2 B1 B2 Not connected
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
1 m – 15 m 15 m – 30 m 30 m – 50 m
Wire diameter
0.52 / 0.33 mm 2
(20 / 22 AWG)
0.33 mm 2
(20 AWG)
0.82 mm 2
(18 AWG)
Parameter setting for long M12 cable
Product
0 m – 15 m cable 15 m – 30 m cable 30 m – 50 m cable
Update following parameter
ETS 12C - ETS 100C
KVS 2C - KVS 5C
Use default values
I028 Valve drive current=
925 mA peak
I028 Valve drive current = 1000 mA peak
I065
Valve duty cycle = 90%
ETS 12.5 - ETS 400
KVS 15 - KVS 42
CTR 20
CCMT 2 - CCMT 8
CCM 10 - CCMT 40
Use default values
I028 Valve drive current=
200 mA peak
I028 Valve drive current= 300 mA peak
ETS 6
Use default values
I028 Valve drive current=
270 mA peak
I028
Valve drive current= 350 mA peak
CCMT 0 Use default values
I028
Valve drive current=
270 mA peak
I028 Valve drive current= 350mA peak
CCMT 1 Use default values
I028 Valve drive current=
400 mA peak
I028
Valve drive current= 500 mA peak
CCMT 16 - CCMT 42 Use default values
I028 Valve drive current=
450 mA peak
I028 Valve drive current= 500 mA peak