Electronic Expansion Valve Drivers
Overview

The XEV22D module is able to drive a large variety of stepper electronic expansion valves. XEV22D permits to regulate the superheat (SH) of the fluid that runs into refrigerating unit in order to obtain optimized performance and a functioning of the evaporator independent by climatic or load conditions. XEV22D modules are equipped with two probe inputs, one for 4 to 20mA or 0 to 5V pressure transducer and another one for NTC-EU, NTC-US or Pt1000 temperature probe. A LAN connection permits to transmit the pressure signal to others XEV modules in order to use only one pressure transducer in multiplexed cabinet applications.

There are also two configurable digital inputs, the first one is free of voltage and the other ones is at high voltage in order to simplify connections with cooling request signal. With the useful display it’s possible to see the value of superheat (SH), the degree of opening of the valve or the probe values, the local keyboard allows programming the instrument without any other devices. To complete instrument equipment, a RS485 serial link permits to connect XEV22D to Dixell monitoring and supervising systems.

Features

XEV SERIES: SUPERHEAT MANAGEMENT – SERIAL OUTPUT

  • Drivers for ON/OFF (pulsed) and stepper electronic expansion valve management
  • ON/OFF (pulsed) expansion valve support with 30W max power and coil c.a.
  • Temperature analog inputs (NTC, PTC, PT1000)
  • Pressure analog inputs (0÷5V, 4÷20mA)
  • Possibility to broadcast via LAN the pressure signal to multiplexed cabinets
  • Alarm management (visual, relay)
  • Cool Defrost for defrost time reduction
  • Standard communication protocol ModBUS-RTU
  • Hot Key or Prog tool kit connector for a quick and easy programming
  • 6VA max power absorption
  • Display with red LED (10.5mm high) and icons

Tech Specs

FEATURES
XEV11D
XEV12D
XEV21D
XEV22D

Kind of valves

ON / OFF

ON / OFF

stepper

stepper

Display  : number digits

-

±3 d.p

-

±3 d.p

Keyboard : push buttons

-

3

-

3

Power supply

24, 110, 230Vac/dc

24, 110, 230Vac/dc

24 Vac/dc

24 Vac/dc

Probe inputs

Suction pressure

4..20mA / 0.5V config

NTC / 4..20mA

NTC / 4..20mA

NTC / 4..20mA

Suction temperature

Pt1000 / NTC
config

Pt1000 / NTC
config

Pt1000 / NTC
config

Pt1000 / NTC
config

Digital inputs

Free of voltage

Present

Present

Present

Present

High voltage

Present

Present

Present

Present

Relay outputs

Alarms

8A config

8A config

8A config

8A config

Other

Valve driver output up to 30W

Present

Present

-

-

Hot key/ Programming Tool Kit Output

Present

Present

-

-

Remote keyboard output

KB1-PRG

-

KB1-PRG

KB1-PRG

Serial output

RS485

RS485

RS485

RS485

Alarm recovery by LAN

Present

Present

Present

Present

Buzzer

option

option

-

-

Gallery
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