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Summary of Contents for Danfoss EKF 1A
- Page 1 User Guide Stepper valve driver Type EKF 1A, EKF 2A Driver for stepper motor valves SW V1.24...
- Page 2 Stepper valve driver, type EKF 1A, EKF 2A Introduction Stepper valve driver EKF series is used where stepper valves must be accurately controlled typically in commercial air conditioning, heat pumps, commercial refrigeration and food retail applications. Features • Support both Bipolar and Unipolar stepper motor valves •...
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Page 3: Portfolio Overview
Stepper valve driver, type EKF 1A, EKF 2A Portfolio overview Table 1: Portfolio overview Features EKF 1A EKF 2A Code number 080G5030 080G5035 Power supply 24 V AC/DC 24 V AC/DC Number of valves 1 stepper motor valve 2 stepper motor valves... - Page 4 Stepper valve driver, type EKF 1A, EKF 2A Applications EKF series stepper valve drivers can be used in application where accurate control of stepper motor valves are needed using analog input signals (0-10V, 0-5V, 4-20 mA, 0-20 mA) from unit programmable controllers. The product can be used for both Bipolar and Unipolar type valves.
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Page 5: Installation
EKF can share power from the same source with a battery backup or unit controller only if battery backup/unit controller ports are galvanically isolated. Danfoss recommends to use EKE 2U as the preferred battery backup device. NOTE: EKE 2U can only support 2 valves for emergency closing, thus EKE 2U should not be shared with more than one EKF 2A or more than two EKF 1A. -
Page 6: Con Guration
The basic product con guration can be done through DIP switch present on the hardware. EKF 1A supports 1 stepper drive output and 1 Dip switch for settings. EKF 2A supports 2 stepper drive output and 2 Dip switch for settings. - Page 7 Stepper valve driver, type EKF 1A, EKF 2A Figure 6: DIP valve section DIP Switch Valve No Valve (Default) ETS 12C, ETS 24C, ETS 25C, ETS 50C, ETS 100C, KVS 2C, KVS 3C, KVS 5C ETS 5M ETS 6, UKV, UKV-J ETS12.5, ETS 25, ETS 50, KVS15...
- Page 8 Stepper valve driver, type EKF 1A, EKF 2A Then Dip switch 2 should have switch 6 at position ON. EKF 2A will then use AI1 signal to control stepper valve 2. Figure 9: DIP switch setting ETS 12C with 0-5 V AI input...
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Page 9: Basic Setting
Stepper valve driver, type EKF 1A, EKF 2A Make necessary changes to parameters from drop down lists. After completing all changes set SW Main switch to ON. EKF is ready to use with the new settings. Figure 11: On-line service ... - Page 10 Stepper valve driver, type EKF 1A, EKF 2A Driver enabling – B100 This parameter should be used to turn ON/OFF driver output. When OFF is selected EKF will not drive valve connected to corresponding stepper output. Valve selection – B101 This parameter is used to select which valve the stepper output is connected to and which setting (DIP switch or KoolProg) that EKF has to follow.
- Page 11 Overdrive will close the valve with extra number of steps towards closing direction. The number of additional steps for overdrive is valve depended. While using Danfoss valves from valve selection list number of steps for overdrive is automatically set.
- Page 12 Stepper valve driver, type EKF 1A, EKF 2A Figure 17: Forced overdrive Opening Degree (OD) Valve position back as per AI signal V123 = Yes V124 criteria fulfilled Execute overdrive Forced overdrive time V124 Time Overdrive Overdrive Forced Overdrive – V123 Forced overdrive is use to trigger an overdrive purely based on time.
- Page 13 Stepper valve driver, type EKF 1A, EKF 2A Figure 18: EKF valve V125 - Valve Size reduction V121 - Input % scale to 0 position V122 - Input % scale to 100 position OD% = scaled by Ai Step = OD% * steps *...
- Page 14 Stepper valve driver, type EKF 1A, EKF 2A Parameters Table 4: BASIC SETTING Label Description Value (Defualt) Unit Enumeration Notes DRIVER 1 0:Parameter con guration al- B100 Driver enabling 1 = On lowed for update; 1:Normal op- 0=O ;1=On eration...
- Page 15 Stepper valve driver, type EKF 1A, EKF 2A Label Description Value (Defualt) Unit Enumeration Notes Danfoss recommends using 1/8 stepping mode as this provides 0=Full; 1=Half; 2=1/4; 3=1/8; V102 User de ned Step mode 0 = Full a good balance between torque...
- Page 16 Stepper valve driver, type EKF 1A, EKF 2A Label Description Value (Defualt) Unit Enumeration Notes VALVE 2 Type of motor used in the step- V200 User de ned Motor type 0 = Unipolar 0=Unipolar; 1=Bipolar per valve (Unipolar/Bipolar). Fast decay mode causes a rapid...
- Page 17 Stepper valve driver, type EKF 1A, EKF 2A Label Description Value (Defualt) Unit Enumeration Notes Input % scale to 100 posi- Signal type is de ned by “B204” V222 tion “AI selection” Manually initiate an overdrive. V223 Force Overdrive 0 = No 0=No;...
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Page 18: Product Speci Cation
STEPPER 1: A1, A2, B1, B2 STEPPER 2: A1, A2, B1, B2 Bipolar and unipolar stepper motor output: - Danfoss ETS/ETS L / KVS / ETS C / KVS C / CCMT 2 – CCMT 42 / CTR / CCMT L Valves... -
Page 19: Troubleshooting
Stepper valve driver, type EKF 1A, EKF 2A Troubleshooting Table 8: Driver settings Label Alarm/Warning Description Troubleshoot Overcurrent alarm driver 1 Analog signal has received higher current Check Current signal source AI1 input. than allowed in AI1 (detected while using... - Page 20 Stepper valve driver, type EKF 1A, EKF 2A Ordering Table 9: Productpart numbers Description CodeNo. Stepper valve driver EKF 1A 080G5030 Stepper valve driver EKF 2A 080G5035 © Danfoss | Climate Solutions | 2022.03 BC387326840736en-000102 | 20...
- Page 21 Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.
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Page 22: Online Support
Online support Danfoss o ers a wide range of support along with our products, including digital product information, software, mobile apps, and expert guidance. See the possibilities below. The Danfoss Product Store The Danfoss Product Store is your one-stop shop for everything product related—no matter where you are in the world or what area of the cooling industry you work in.
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