Technical Specifications; Power Supply - Danfoss EKE 1C Installation Manual

TECHNICAL SPECIFICATIONS

POWER SUPPLY

EKE has galvanic isolation by switch-mode power supply.
24 V AC ± 20 %, 50/60 Hz. Maximum power consumption: 18 VA.
Input voltage rating (DC): 24 V DC ± 20%, 15 W.
I/O TYPE
Voltage
Current
Analog
NTC
inputs
Pt 1000
Auxiliary
Supplies
Digital Voltage free
inputs contacts
Digital
Relay
output
Stepper Bipolar /
motor unipolar
Battery
backup
RS-485 RTU
Communi-
cation
CAN
© Danfoss | Climate Solutions | 2023.10
NUMBER SPECIFICATION
Max. 15 V input voltage
Do not connect voltage sources to unpowered units without limiting the current
to analog inputs (overall 80 mA).
Open circuit HW diagnostics available for voltage input on : AI3 and AI4
AI3, AI4
0 - 5 V, 0 - 5 V ratiometric, 0 - 10 V
2
AI3, AI4
0 - 20 mA
AI1 (S3/S4), AI2 (S2), AI5 (S3/S4)
NTC temperature probes, 10 k at 25 °C
AI1 (S3/S4), AI2 (S2)
3
Accuracy: ≤ 0.5 K
Resolution: 0.1 K.
Range: 723 to 1684
5 V +
1
Sensor supply: 5 VDC / 50 mA, overload protection approximately 150 mA
15 V +
1
Sensor supply: 15 VDC / 30 mA, overload protection approximately 200 mA
DI1, DI2
Steady current minimum 1mA
2 Cleaning current 100mA at 15 V DC
On: RIL < = 300
O : RIH > = 3.5 k
C1-NO1
Normally Open: 3 A General purpose, 250 V AC, 100 k cycle
1
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 valves: A1, A2, A3, A4
Bipolar stepper motor output:
- Danfoss ETS 6 / ETS 8M (Bipolar) / ETS C / ETS L / KVS / KVS C / CCMT 2 –
CCMT 42 / CCMT L / CTR Valves
Other Valves:
1
- 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
VBATT: 18 – 24 V DC (24 V DC recommended):
1 – max. battery current: 850 mA at 18 V
– battery alarm will be activated below 16 V DC and above 27 V DC
RS485
1 Galvanic isolation.
No Built-in termination.
CAN - RJ
1
RJ connector to directly connect and supply a MMI.
AN269954243889en-000905 | 2