Electronic Expansion Valve Driver  
Download Broucher
 
Instruction manual
 
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
 
Fast Recovery:
  The XEV series uses a special algorithm to return to a normal situation of regulation after verifying a superheat alarm condition. Dixell’s Fast Recovery algorithm corrects the superheat problems more rapidly than the traditional systems because if a critical situation occurs, the regulation system increases its speed of reaction.
 
Refrigeration Circuit:
The diagram shows the different ways to connect the XEV drivers to a generic application like a single cooling unit or multiplexed cabinet. The valve is drived by the XEV module that is in turn commanded, by the activation of the digital input, from the temperature controller.
SINGLE SYSTEM: section 1 of the schematic diagram shows how connections would be arranged for a single cooling system.
MULTIPLEXED CABINET: to reduce installation costs, it is possible to use a single suction pressure transducer as shown in the overall schematic diagram.
This transducer’s pressure signal is repeated to the other controllers across a digital LAN connection that guarantees optimal noise immunity.
 
 
Features :
    XEV11D   XEV12D   XEV21D   XEV22D
Kind of valves   ON/OFF   ON/OFF   stepper   stepper
Display: n° digits       ± 3 d.p.       ± 3 d.p.
Keyboard: push buttons  

 

 

3

 

 

 

3

Power supply   24, 110, 230Vac   24, 110, 230Vac   24Vac/dc   24Vac/dc
Probe inputs                
Suction pressure   4÷20mA/0÷5V config   4÷20mA/0÷5V config   4÷20mA/0÷5V config   4÷20mA/0÷5V config
Suction temperature   Pt1000/NTC config   Pt1000/NTC config   Pt1000/NTC config   Pt1000/NTC config
Digital Input                
Free of voltage   pres   pres   pres   pres
High voltage   pres   pres   pres   pres
Relay outputs                
Alarm   8A config   8A config   8A config   8A config
Other                
Valve driver output up to 30W   pres   pres        
Hot Key/Prog Tool Kit output   pres   pres   pres   pres
Remote keyboard output   KB1-PRG       KB1-PRG    
Serial output   RS485   RS485   RS485   RS485
Alarm recovery by LAN   pres   pres   pres   pres
Buzzer   opt   opt        
 
 
 
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