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