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Diagram illustrating wiring connections for a single valve setup.
Diagram showing wiring connections for two valves.
Wiring diagram detailing IPro interface connections.
The XEV20D is a versatile stepper valve actuator designed for precise control in refrigeration systems. It is compatible with both bipolar and unipolar stepper valves, offering flexibility for various applications. This device is engineered to integrate seamlessly with ISaGRAF® environments, iPRO series programmable devices, and i-CHILL 200CX series instruments, providing a comprehensive solution for advanced control needs.
The primary function of the XEV20D is to drive stepper valves, enabling accurate regulation of refrigerant flow. It features two configurable valve outputs, allowing it to manage either one or two valves simultaneously. The actuator supports a range of analog inputs for precise monitoring, including NTC, PTC, and Pt1000 sensors for temperature measurement, and 4-20mA or 0-5V inputs for other process variables. This extensive input capability ensures that the XEV20D can adapt to diverse sensing requirements within a refrigeration system.
Communication is a key aspect of the XEV20D's functionality. It incorporates a CanBus serial line, facilitating robust and reliable data exchange with other devices in a network. Additionally, it includes LAN connectivity, enabling communication with other instruments in the same series or with i-CHILL200CX series devices. This networked capability allows for centralized control and monitoring, enhancing the overall efficiency and responsiveness of the refrigeration system. The device's address is set via a dip-switch, allowing for easy configuration within a multi-device setup.
The XEV20D is designed to handle a wide range of stepper valves, with maximum current values specified for both bipolar (4-wire) and unipolar (5-6 wire) configurations. For single-valve setups, it can deliver up to 0.9A max for bipolar valves and 0.33A max for unipolar valves in full step mode. In two-valve configurations, it maintains these current capabilities for each valve, ensuring consistent performance across different system sizes. Users are advised to consult the valve manufacturer's technical manual to verify that the maximum current used to drive the valve is within the actuator's specified limits.
The XEV20D is designed with user convenience and safety in mind. Before installation and operation, users are strongly advised to read the manual thoroughly, as it contains critical information regarding proper usage and safety precautions. The device should only be used for its intended purpose and not as a safety device. It is crucial to check the supply voltage before connecting the instrument and to ensure that the operating environment does not expose the controller to water or moisture, preventing condensation.
Installation involves connecting various components, including power supply, valve outputs, and sensor inputs. The wiring diagram provides clear guidance for both one-valve and two-valve configurations, detailing connections for the valves, analog inputs (Pb1/Pb2, Pb3/Pb4), and communication lines (CanBus, LAN). Specific connection modes for valves from different manufacturers, such as ALCO EX, ALCO EX5/6, SPORLAN SEI-SHE, DANFOSS ETS, and SAGINOMIYA, are provided in a quick reference table, simplifying the wiring process.
The device features LEDs that provide immediate visual feedback on its operational status. The "PWR ON" LED indicates that the device is correctly powered. An "ALARM" LED illuminates if an alarm condition is present. The "TX/RX" LED blinks during CanBus or LAN activity, signifying active communication, and remains on if there is no link. Separate LEDs for "OPEN V1," "CLOSE V1," "OPEN V2," and "CLOSE V2" indicate the status of each valve, blinking when a valve is opening or closing, and remaining on when it is completely opened or closed. This intuitive LED system allows for quick diagnostics and monitoring of the valve operations.
For integration with iPRO series devices, specific IPro connections are detailed, including RS485 Master and Slave configurations, remote display connections, and modem interfaces. This ensures seamless communication and control within a broader system architecture. The XEV20D's address can be configured using a dip-switch, which sets the address in binary mode, allowing for unique identification within a network. This addressing scheme is essential for proper communication over the CanBus serial line.
Maintenance of the XEV20D primarily involves ensuring proper installation and adherence to safety guidelines. Users are warned to disconnect all electrical connections before performing any maintenance. The instrument should not be opened by the end-user; in case of failure or faulty operation, it should be returned to the distributor or Dixell S.p.A. with a detailed description of the fault. This approach ensures that any repairs are carried out by qualified personnel, maintaining the integrity and safety of the device.
To prevent potential issues, it is important to ensure that the wires for probes, loads, and the power supply are separated and kept far enough from each other, avoiding crossing or intertwining. In industrial environments, the use of mains filters (such as Dixell's FT1 model) in parallel with inductive loads is recommended to enhance stability and prevent electrical interference. These preventive measures contribute to the long-term reliability and performance of the XEV20D.
The device is designed for durability and consistent performance, with non-volatile memory (EEPROM) for data storage, ensuring that configurations and operational data are retained even during power interruptions. Regular checks of the LED indicators can help in early detection of operational issues or communication problems, facilitating timely troubleshooting. By following the provided guidelines for installation, operation, and maintenance, users can ensure the optimal functioning and extended lifespan of the XEV20D stepper valve actuator.
General| Model | XEV20D |
|---|---|
| Protection Degree | IP20 |
| Communication | Modbus RTU |
| Relative Humidity | 20% to 90% non-condensing |
| Digital Inputs | 2 |
| Box Material | Plastic |
| Connections | Screw terminals |
| Certifications | CE, UL |
