Danfoss EKE 1P Stepper Valve Extension Module Installation Guide

Do not connect voltage sources to unpowered units without limiting the current to analogue inputs (overall 80 mA). Open circuit HW diagnostics available for voltage input on: AI4

Voltage

2

0 – 5 V ratiometric

AI4

0 – 5 V, 0 – 10 V

1

Sensor supply: 5 V DC / 15 mA, overload protection approximately 150 mA

Voltage free contacts

2

Steady current minimum 1 mA Cleaning current 100 mA at 15 V DC On: RIL < = 300 Ω

Off: RIH > = 3.5 k Ω

Digital output

Relay

1

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

Bipolar and unipolar stepper motor output:

• Danfoss CCMT 3L – CCMT 8L / CCMT 0 – CCMT 42 / CCM 10 – CCM 40 / ETS 6 – ETS 400 / CTR 20
  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

1

• max. battery current: 850 mA at 18 V
• battery alarm will be activated below 16 V DC and above 27 V DC

RS-485 RTU

1

Galvanic isolation

No built-in termination

CAN

1

Application 1: Connect directly to AK-PC

Application 2: Connect directly to graphical display, MMIGRS2. Activate the termination on the graphical display.

1=Application 1 – High Pressure expansion module 2=Application 1 – Receiver Expansion module 3=Application 2 – Valve Driver

Note: changing this setting also changes the EKE 1P address, causing communication with the graphical display to stop. Communication will resume after a power cycle.