Danfoss EKF Series Installation Manual

Installation guide
Stepper Valve Driver
Type EKF 1A, EKF 2A
Introduction
Stepper Valve Driver EKF series is for use where stepper motor valves must be accurately controlled,
typically in commercial air conditioning, heat pumps, commercial refrigeration and food retailing
applications.
Technical Specificatons
Supply voltage
Power consumption
Analog inputs
Digital outputs
Valve support
Battery backup
Enviroment
DIN Mounting
© Danfoss | Climate Solutions | 2021.07
EKF 1A: 24 V AC / DC 50 / 60 Hz
EKF 2A: 24 V AC / DC, 50 / 60 Hz
Idle operating:
Power consumption for using 1 valve.
CCMT 16 – CCMT 42:
ETS 5M, ETS 6:
ETS 12C – ETS 100C, KVS C: 30 VA /15 W
ETS 12.5 – 400:
ETS 500P, 800P:
CCMT 2- CCMT 8:
CTR 20:
CCMT L:
When using two valves sum the power consumption of each valve.
EKF 1A: 1 input AI1
EKF 2A: 2 inputs AI1 and AI2
Max. 15 V Analog input voltage. Do not connect voltage sources to unpowered units
without limiting the current to analog inputs (overall 40 mA per input).
Input Impedance: >50 kΩ (Voltage Input) 120 Ω ± 2% (Current Input)
1 output for EKF1A / EKF 2A: D01 (open collector), sink current max 10 mA
EKF 1A: 1 stepper motor valve output, EKF 2A: 2 stepper motor valve output
STEPPER 1: A1, A2, B1, B2
STEPPER 2: A1, A2, B1, B2
Bipolar and unipolar stepper motor output:
- Danfoss ETS / KVS / ETS C / KVS C / CCMT 2 – CCMT 42 / CTR / CCMT L Valves
- ETS 6 / ETS 5M Valves
Open circuit HW diagnostics is present.
1 input for EKF 1A / EKF2A: Vbat
BAT, GND: Nominal 18 – 24 V DC, Min 16 V DC - Max 28 V DC (EKE 2U
recommended)
Max. battery current: 2 A at 18 V (valve depended)
Battery alarm/warning will be activated below 16 V DC.
Storage
Operating
Humidity
4 DIN
< 1 W (without valve)
25 VA / 15 W
20 VA / 10 W
10 VA / 5 W
28 VA / 20 W
10 VA / 5 W
14 VA / 10 W
20 VA / 10 W
0-5 V, 0-10 V, 4-20 mA, 0-20 mA
0-5 V, 0-10 V, 4-20 mA, 0-20 mA
-30 – 80 °C / -22 – 176 °F
-20 – 60 °C / -4 – 140 °F
< 90% RH, non-condensing
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