Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 11
4.3 Inputs / outputs
I/O TYPE SPECIFICATIONS
Analog
inputs
Max. 15 V input voltage.
Do not connect voltage sources without current limitation (overall 80 mA) to analog inputs
while unit is not powered.
Open circuit HW diagnostics available for voltage input on: AI3, AI4 (EKE 1C) AI4 (EKE 1A
and EKE 1B).
0 – 5 V EKE 1C, AI3, AI4, and EKE 1A/EKE 1B, AI3. Accuracy ± 40 mV, resolution 1.2 mV.
0 – 10 V EKE 1C, AI3, AI4, and EKE 1A/EKE 1B, AI4. Accuracy ± 50 mV, resolution 2.5 mV.
0 – 20 mA
(EKE 1C only)
Accuracy ± 100 μA, resolution 10 μA.
Input resistance: <100 Ω
NTC Sensor NTC temperature probes: 10 kΩ at 25 °C range: 300 kΩ to 100 Ω
Accuracy: 50 – 120 °C: 1.5 K, -40 – 50 °C: 0.4 K, 0 °C: 0.2 K
Resolution: ≤ 0.1 K, ≤ 0.3 K (EKC 1C, AI5)
Pt1000 sensor Range: 723 Ω to 1684 Ω
Accuracy: ≤ 0.5 K
Resolution: ≤ 0.1K
Pressure sensor Type: Ratiometric
- Accuracy: 1.6 %
- Range: 0.5 – 4.5 V
- Resolution: 1.2 mV
- Supply voltage: 5 V DC / 15 mA, overload protection approximately 150 mA
Digital
Input (DI)
Voltage free
contacts
Steady current of 1 mA (EKE 1C only). A cut-in input will activate a function.
Cleaning current of 100 mA at 15 V DC.
On: RIL <= 300 Ω . O: RIH >= 3.5 kΩ.
No destructive if Vbat + is connected to DI (only for DI on bottom pcb).
Min. pulse time 64 ms.
Digital
output (D01)
Relay 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 and
unipolar stepper
motor output:
- Danfoss ETS / KVS / ETS C / KVS C / CCMT 2 – CCMT 42 / CTR Valves
(green, red, black, white)
- ETS 6 / CCMT 0 / CCMT 1 (black, red, yellow, orange)
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
VBATT: 18 – 24 V DC:
Leakage: <15 μA @30 V DC
Optional: critical low alarm below 12V
Optional: low alarm at 17 V, high voltage alarm at 27 V
The valve will not close at power fail if voltage is higher than 27 V
Required power to do 1 closing of stepper valve:
ETS 6: 110 J / 30 VmAh
ETS 12.5 - ETS 400: 60 J / 17 VmAh
KVS 15 / KVS 42: 60 J / 17 VmAh
ETS 12C - ETS 100C: 55 J / 15 VmAh
KVS 2C / KVS 5C: 55 J / 15 VmAh
CCMT 2 - CCMT 8: 60 J / 17 VmAh
CCMT 16 - CCMT 42: 175 J / 49 VmAh
CTR 20: 60 J / 17 VmAh
Communication RS-485 RTU Galvanic isolation. No Built in termination.
Supported commands with max. of 50 ms response time : 0 x 03, 0 x 04, 0 x 06.
CAN 4 ways terminal block and RJ connector to directly connect and supply a user interface MMI.
For Danfoss controllers only.
Warning!
Battery Backup does not
generate power to recharge the
connected device to its terminal.
Do not connect external power
supply to the digital input DI
terminals. else it will damage the
controller.
The relays cannot be used
for the direct connection of
capacitive loads such as LEDs
and ON/OFF control of EC
motors. All loads with a switch
mode power supply must be
connected with a suitable
contactor or similar.