Contents
1 General Warnings
PLEASE READ BEFORE USING THIS MANUAL
SAFETY PRECAUTIONS
- Check if the supply voltage is correct before connecting the instrument.
- Do not expose to water or moisture: use the controller only within the operating limits avoiding sudden temperature changes with high atmospheric humidity to prevent formation of condensation.
- Warning: Disconnect all electrical connections before any kind of maintenance.
- Fit the probe where it is not accessible by the end user. The instrument must not be opened.
- In case of failure or faulty operation send the instrument back to the distributor or to "Dixell S.p.A." with a detailed description of the fault.
- Consider the maximum current which can be applied to each relay (see Technical Data).
- Ensure that the wires for probes, loads and the power supply are separated and far enough from each other, without crossing or intertwining.
- In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel with inductive loads could be useful.
2 General Description
XEV20D is a stepper valve actuator intended either for bipolar stepper valves or unipolar stepper valves. This device has been used with ISaGRAF® environment and with programmable devices of iPRO series or in combination with instruments of i-CHILL 200CX series.
The maximum configuration of hardware is equipped with:
- 2 configurable valve outputs to drive bipolar or unipolar valves
- Pb1/Pb2 configurable analog inputs: NTC/PTC/Pt1000
- Pb3/Pb4 configurable analog inputs: 4 to20mA/0 to5V/Pt1000
- CanBus serial line
- LAN to communicate with instrument of the same series or devices of i-CHILL200CX series
3 Absolute Maximum Power
XEV20D is able to drive a wide range of stepper valves. The following table indicates the maximum values of current that the actuator can supply to the stepper wiring. Select the current transformer depending on the application. For each kind of driving and functioning, the Dixell transformer to use is reported.
NOTE: The electrical power absorption of the valve can be unrelated to the refrigeration power that valve has. Before using the actuator, please read the technical manual of the valve supplied by the manufacturer and check the maximum current used to drive the valve in order to verify that they are lower than those indicated below.
| Valve Type | Driving Mode | ONE VALVE | TWO VALVES | ||
|---|---|---|---|---|---|
| Full Step | Full Step | ||||
| Bipolar Valves (4 wires) | Current 0.9A max > TF20D | Current 0.9A max for each valve > TF40D | |||
| Unipolar Valves (5-6 wires) | Current 0.33A max > TF20D | Current 0.33A max for each valve > TF20D | |||
4 Wiring Diagram
4.1 One Valve Configuration
Diagram Description: The diagram shows the wiring for a single valve configuration. It includes terminals for Valve 1 (+12V, W1, W2, GND), Address dip-switch (1-4), CAN Bus (Term, 20, 21, 22), and analog inputs/outputs (Pb1, Pb2, Pb3, Pb4) along with power supply (24V, Pbc, GND, +5V, LAN).
Connections:
- Valve 1: +12V, W1, W2, GND
- Address Dip Switch: 1, 2, 3, 4
- CAN Bus: Term, 20, 21, 22
- Analog Inputs/Outputs: Pb1 (1), Pb2 (2), Pb3 (3), Pb4 (4)
- Supply: 24V (7), Pbc (8), GND (9), +5V (10), LAN (11, 12)
4.2 Two Valves Configuration
Diagram Description: This diagram illustrates the wiring for a two-valve configuration, showing duplicated valve wiring terminals for Valve 1 and Valve 2, alongside Address dip-switch, CAN Bus, and analog input/output terminals, plus power supply connections.
Connections:
- Valve 1: +12V, W1, W2, GND
- Valve 2: +12V, W1, W2, GND
- Address Dip Switch: 1, 2, 3, 4
- CAN Bus: Term, 20, 21, 22
- Analog Inputs/Outputs: Pb1 (1), Pb2 (2), Pb3 (3), Pb4 (4)
- Supply: 24V (7), Pbc (8), GND (9), +5V (10), LAN (11, 12)
4.3 IPro Connections
Diagram Description: This diagram details the IPro connections, showing RS485 Master, RS485 Slave, and CAN Bus interfaces. It includes numerous digital and analog input/output terminals (D1-D19, Out1-Out8, Pb1-Pb10, TF1-TF2), power supply terminals (24V, +12V, +5V), and connections for remote displays and modems. Two separate address blocks are shown for Address 1 and Address 2, each with dip switches and CAN Bus terminals.
Key Connection Areas:
- RS485 Master: Terminals 94-96
- RS485 Slave: Terminals 97-99
- CAN Bus: Terminals 100-102 (for main unit), and separate terminals for Address 1 and Address 2 (20, 21, 22).
- Digital Inputs/Outputs: D1-D19, Out1-Out8
- Analog Inputs/Outputs: Pb1-Pb10
- Power Supply: 24V, +12V, +5V
- Address Blocks: Two blocks for Address 1 and Address 2, each with dip switches and CAN Bus terminals.
5 Valve Connections
This section provides a quick reference for the connection mode for valves from different manufacturers.
4 WIRES VALVES (BIPOLAR)
| Connection Numbering | ALCO EX* | ALCO EX5/6 | SPORLAN SEI-SHE | DANFOSS ETS |
|---|---|---|---|---|
| 4 | White | Blue | White | Black |
| 2 | Yellow | Brown | Black | White |
| 3 | Brown | Black | Red | Red |
| 1 | Green | White | Green | Green |
| 5 - Common | ---- | ---- | ---- | ---- |
5-6 WIRES VALVES (UNIPOLAR)
| Connection Numbering | SPORLAN | SAGINOMIYA |
|---|---|---|
| 4 | Orange | Orange |
| 2 | Red | Red |
| 3 | Yellow | Yellow |
| 1 | Black | Black |
| 5 - Common | Gray | Gray |
Diagram Description (Figure 5-1 - XEV20D Device): The diagram shows a physical representation of the XEV20D device with terminal labels. It indicates connections for Power Supply (PWR, ON, A, GND, +12V, W1, W2), Alarm, Valve 1, Valve 2, Address dip-switch (1-4), CAN Bus (Term, 20, 21, 22), and analog/digital I/O terminals (Pb1-Pb4, Supply 24V, Pbc, GND, +5V, LAN).
6 Serial Line - CanBus
The device can communicate through the CanBus serial line only when a correct address is set. The addressing is made through the dip-switch called Address.
Diagram Description (Figure 6-1 - CanBus Serial Line): This figure illustrates the 8 dip switches used for setting the device address, labeled 1 through 8. Each switch can be in the ON or OFF position.
Diagram Description (Figure 6-2 - CanBus Device): This figure shows a close-up of the dip switches and explains the binary addressing mode. Each selector has a different weight: 1x1=1, 2x0=0, 4x1=4, 8x1=8, summing to 13 for the example shown.
The following table details the ISaGRAF lines configuration to connect the valve actuator:
| LINE | GEN_LINE | GEN_AO | GEN_AO | GEN_AO | GEN_A1 | GEN_DI | |
|---|---|---|---|---|---|---|---|
| channel number | 4 | 2 | 7 | 4 | 3 | ||
| line_num | CanBus Number | CanBus Number | CanBus Number | CanBus Number | CanBus Number | CanBus Number | |
| name | CAN | ||||||
| par_1 | CanBus Number | CanBus Number | CanBus Number | CanBus Number | CanBus Number | CanBus Number | |
| par_2 | CAN node address | 16 | 17 | 26 | 1 | 31 | |
| par_3 | 10 | ||||||
| I/O 1 | EVV_StepsOutput Valve 1 | EEV_OutRateValve 1 | EVV_ProbeConfiguration Valve 1 | EVV_Temperature Valve 1 | EVV_ValvePosition Valve 1 | ||
| I/O 2 | EVV_StepsOutput Valve 2 | EEV_OutRateValve 2 | EVV_ProbeConfiguration Valve 2 | EVV_Temperature Valve 2 | EVV_ValvePosition Valve 2 | ||
| I/O 3 | EVV_Steps MaxValve 1 | EVV_ProbeConfiguration Valve 1 | EVV_Pressure Valve 1 | ||||
| I/O 4 | EVV_Steps MaxValve 2 | EVV_ProbeConfiguration Valve 2 | EVV_Pressure Valve 2 | ||||
| I/O 5 | EVV_OutPhaseCurrent Valve 1 | ||||||
| I/O 6 | EVV_OutPhaseCurrent Valve 2 | ||||||
| I/O 7 | EVV_OutValveConfiguration | ||||||
| I/O 8 |
7 LEDs Meaning
The following table has to be used to configure ISaGRAF lines to connect the valve actuator.
| LED | MODE | MEANING |
|---|---|---|
| PWR ON | On | The device is correctly powered |
| ALARM | On | An alarm is present |
| TX/RX | Blinking | CanBus or LAN activity, communication activated |
| TX/RX | On | No link |
| OPEN V1 | Blinking | Valve 1 is opening |
| OPEN V1 | On | Valve 1 completely opened |
| CLOSE V1 | Blinking | Valve 1 is closing |
| CLOSE V1 | On | Valve 1 completely closed |
| OPEN V2 | Blinking | Valve 2 is opening |
| OPEN V2 | On | Valve 2 completely opened |
| CLOSE V2 | Blinking | Valve 2 is closing |
| CLOSE V2 | On | Valve 2 completely closed |
8 Technical Data
| Case | 4 DIN |
| Connectors | Disconnectable terminal block ≤ 2,5 mm2 for valve outputs and minifit connector for low voltage section |
| Power Supply | 24Vac/dc; Absorption: 40VA max. |
| Probe Inputs | 2 configurable as NTC/PTC/Pt1000 |
| Valve Output(s) | See table on page 3 |
| Serial Connection | CanBus and LAN for iCHILL200CX |
| Data Storing | Non volatile memory (EEPROM) |
| Kind of Action | 1B; Pollution Grade: 2; Software Class: A |
| Rated Impulsive Voltage | 2500V; Over-voltage Category: II |
| Operating Temperature | 10 to 60 °C; Storage Temperature: -30 to 85 °C |
| Relative Humidity | 20 to 85% (no condensing) |
| Measuring and Regulation Range |
PTC Probe: -50 to 150°C NTC Probe: -40 to 110°C Pt1000 Probe: -50 to 100°C Pressure Transducer: -1.0 to 50.0 Bar |
| Resolution | 0,1°C or 1 °F; Precisione@ 25°C: ±0,1 °C ±1 digit |
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