© Danfoss | Climate Solutions | 2023.10
AN269954243889en-000905 | 2
I/O TYPE NUMBER SPECIFICATION
Analog
inputs
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
Voltage
2
AI3, AI4
0 - 5 V, 0 - 5 V ratiometric, 0 - 10 V
Current
AI3, AI4
0 - 20 mA
NTC
3
AI1 (S3/S4), AI2 (S2), AI5 (S3/S4)
NTC temperature probes, 10 kΩ at 25 °C
Pt 1000
AI1 (S3/S4), AI2 (S2)
Accuracy: ≤ 0.5 K
Resolution: 0.1 K.
Range: 723 Ω to 1684 Ω
Auxiliary
Supplies
1
5 V +
Sensor supply: 5 VDC / 50 mA, overload protection approximately 150 mA
1
15 V +
Sensor supply: 15 VDC / 30 mA, overload protection approximately 200 mA
Digital
inputs
Voltage free
contacts
2
DI1, DI2
Steady current minimum 1mA
Cleaning current 100mA at 15 V DC
On: RIL < = 300 Ω
O: RIH > = 3.5 k Ω
TECHNICAL SPECIFICATIONS
Digital
output
Relay 1
C1-NO1
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 /
unipolar
1
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:
- 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
1
VB AT T: 18 – 24 V DC (24 V DC recommended):
– max. battery current: 850 mA at 18 V
– battery alarm will be activated below 16 V DC and above 27 V DC
Communi-
cation
RS-485 RTU 1
RS485
Galvanic isolation.
No Built-in termination.
CAN 1
CAN - RJ
RJ connector to directly connect and supply a MMI.
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.
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