Cabling Lengths For Different Connections - Danfoss EKE 1A User Manual

Superheat controller, Type EKE 1A, 1B, 1C, 1D
Table 10: EKE 1D pinout
COM
AI
AI2
AI3
AI4
COM
DI1
DI2/3
5V+
COM
 NOTE:
• EKE 2U Backup power module is recommended to ensure closure of the electronic valves. in case of power failures
• If Dl1(On/Off) switch is not used it must be short circuited

3.4 Cabling lengths for different connections

Considerations:
• The max. cable distance between the controller and the valve depends on many factors like shielded/unshielded
cable, the wire size used in the cable, the output power for the controller and EMC.
• Keep controller and sensor wiring well separated from mains wiring.
• Connecting sensors by wires more than the specified length may decrease the accuracy of measured values.
• Separate the sensor and digital input cables as much as possible (at least 10 cm) from the power cables to the
loads to avoid possible electromagnetic disturbance. Never lay power cables and probe cables in the same
conduits (including those in the electrical panels).
• For the CANbus cable, it is best to use 24 AWG shielded twisted-pair cable with a shunt capacitance of 16 pF/ft and
100 Ω impedance.
• The controller provides a communication interface which is connected to the RJ and CAN terminals.
• Terminal resistors 120 Ω for terminal devices are recommended at both ends of the bus (first and last node)
Terminal resistance between H and R terminals.
Table 11: EKE controller supports the following max. cable length
Analog inputs (Current/Voltage)
Temperature sensor
Stepper valve connection
Power supply
Digital input
Digital output
Digital MMI
Communication bus
• All valves are driven 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 Danfoss 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 the configuration section for details).
• The correct valve must be defined in "Valve configuration", i.e., parameter I067.
Table 12: ETS Colibri / KVS Colibri/ ETS / KVS / CCM / CCMT / CTR
Danfoss M12 Cable
ETS Colibri® / KVS Colibri /
CCMT / CTR / CCM Pins
EKE terminals
Table 13: ETS 6
Wire color
EKE terminals
© Danfoss | Climate Solutions | 2022.06
Common
Analog inputs NTC 10K
Analog input NTC 10K
Analog inputs 0 – 5 V / Ratiometric pressure transmitter
analog inputs 0 – 10 V
Common
Digital input 1
Digital input 2 and 3
Power output for Ratiometric pressure transmitter 0 – 5V
Common
max. 3 m over CAN RJ
White
3
A1
Orange Yellow
A1 A2
Cable length
max. 10 m
max. 10 m
max. 30 m
max. 5 m
max. 10 m
-
max. 1000 m
Black
4
A2
Red
B1
S3/S4 selectable via software
S2
Pe
External Reference signal
Main switch (hardware)
Software configurable DI
Wire size (Min. / Max.)
0.14 /1.5 mm2
-
0.14 /1.5 mm2
0.2 /2.5 mm2
0.14 /1.5 mm2
0.2 /2.5 mm2
-
0.14 /1.5 mm2
Red Green
1 2
B1 B2
Black Gray
B2 Not connected
BC398828796060en-000101 | 13