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dIXEL

fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during

defrost, to prevent premature defrost termination.

10. TTL/RS485 Serial line

The TTL connector allows, by means of the external module TTL/RS485 (XJ485CX), to connect the

unit to a network line ModBUS-RTU compatible as the dIXEL monitoring system XJ500 (Version

3.0). The same TTL connector is used to upload and download the parameter list of the "HOT KEY".

The instruments can be ordered wit the serial output RS485(Optional).

11. Use of the programming "HOT KEY "

The Wing units can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to

the "Hot Key" and vice-versa.

11.1 DOWNLOAD (FROM THE "HOT KEY" TO THE INSTRUMENT)

Turn OFF the instrument by means of the ON/OFF key, remove the TTL serial cable if present,

insert the "Hot Key" and then turn the Wing ON.

Automatically the parameter list of the "Hot Key" is downloaded into the Wing memory, the

"DoL" message is blinking. After 10 seconds the instrument will restart working with the new

parameters.

Turn OFF the instrument remove the "Hot Key", plug in the TTL serial cable, then turn it ON

again.

At the end of the data transfer phase the instrument displays the following messages:

"end " for right programming.

The instrument starts regularly with the new programming.

"err" for failed programming.

In this case turn the unit off and then on if you want to restart the download again or remove

the "Hot key" to abort the operation.

11.2 UPLOAD (FROM THE INSTRUMENT TO THE "HOT KEY")

Turn OFF the instrument by means of the ON/OFF key and remove the TTL serial cable if

present; then turn it ON again.

When the Wing unit is ON, insert the "Hot key" and push

appears.

Push "SET" key to start the UPLOAD; the "uPL" message is blinking.

Turn OFF the instrument remove the "Hot Key", plug in the TTL serial cable, then turn it ON

again.

At the end of the data transfer phase the instrument displays the following messages:

"end " for right programming.

"err" for failed programming. In this case push "SET" key if you want to restart the

programming again or remove the not programmed "Hot key".

12. ALARM SIGNALS

Message Cause

"P1"

Thermostat probe failure

"P3"

Probe 3 probe failure

"P4"

Probe 4 probe failure

"HA"

Maximum temperature alarm

"LA"

Minimum temperature alarm

"HA2"

Condenser high temperature

"LA2"

Condenser low temperature

"dA"

Door open

"EA"

External alarm

"CA"

Serious external alarm (i1F=bAL) All outputs OFF.

"CA"

Pressure switch alarm (i1F=PAL) All outputs OFF

"EE"

Data or memory failure

The alarm message is displayed until the alarm condition is recovery.

All the alarm messages are showed alternating with the room temperature except for the "P1" which is

flashing.

To reset the "EE" alarm and restart the normal functioning press any key, the "rSt" message is

displayed for about 3s.

12.1 SILENCING BUZZER

Once the alarm signal is detected the buzzer can be silenced by pressing any key. Buzzer is mounted

in the keyboard and it is an option.

12.2 "EE" ALARM

The dIXEL instruments are provided with an internal check for the data integrity. Alarm "EE" flashes

when a failure in the memory data occurs. In such cases the alarm output is enabled.

12.3 ALARM RECOVERY

Probe alarms : "P1" (probe1 faulty), "P3" and "P4"; they automatically stop 10s after the probe restarts

normal operation. Check connections before replacing the probe.

Temperature alarms "HA", "LA" "HA2" and "LA2" automatically stop as soon as the temperature

returns to normal values.

Alarms "EA" and "CA" (with i1F=bAL) recover as soon as the digital input is disabled.

Alarm "CA" (with i1F=PAL) recovers only by switching off and on the instrument.

13. Technical data

Keyboards

Housing: self extinguishing ABS.

Case: T620: facia 38x185 mm; depth 23mm

V620: facia 72x56 mm; depth 23mm

CX620: facia 75x36 mm; depth 23mm

Mounting: T620: panel mounting in a 150x31 mm panel cut-out with two screws.

Distance between the holes 165mm

V620: panel mounting in a 56x72 mm panel cut-out with two screws.

between the holes 40mm

CX620: panel mounting in a 71x29mm panel cut-out

1592026000 XW20K GB R1.0 22.02.2008.doc

Installing and Operating Instructions

key; the "uPL" message

Outputs

Alarm output ON; Compressor output according to

parameters "COn" and "COF"

Alarm output ON; Other outputs unchanged

It depends on the "Ac2" parameter

It depends on the "bLL" parameter

Compressor and fans restarts

Output unchanged.

Alarm output ON; Other outputs unchanged

∅

3x2mm. Distance

Protection: IP20; Frontal protection: IP65 with frontal gasket

Connections: Screw terminal block

Power supply: from XW20K power module

Display: 3 digits, red LED, 14,2 mm high.

Optional output: buzzer

Power module XW20K

Case: 8 DN: 140X176X148.

Connections: Screw terminal block

Power supply: 230Vac or. 110Vac

Power absorption: 10VA max.

Inputs: 4 NTC probes

Digital inputs: 1 free voltage

Relay outputs: Total current on loads MAX. 20A

compressor: relay SPST 20(8) A, 250Vac

light (oA3): relay SPST 16(5) A, 250Vac

Serial output : TTL standard.

Communication protocol: Modbus - RTU

Data storing: on the non-volatile memory (EEPROM).

Kind of action: 1B.

Pollution grade: normal

Software class: A.

Operating temperature: 0÷60 °C.

Storage temperature: -25÷60 °C.

Relative humidity: 20

Measuring and regulation range: NTC probe: -40÷110°C (-58÷230°F)

Resolution: 0,1 °C or 1°C or 1 °F (selectable).

Accuracy (ambient temp. 25°C): ±0,5 °C ±1 digit

14. CONNECTIONS

14.1 XW20K

15. Default setting values

Label Name

REGULATION

Set Set point

Differential

Minimum set point

Maximum set point

Thermostat probe calibration

P3P Third probe presence (1st cond.

probe)

Third probe calibration

P4P Fourth probe presence (2nd

probe)

Fourth probe calibration

OdS Outputs activation delay at start up

AC Anti-short cycle delay

Ac1 Second compressor delay

CCt Compressor ON time during fast

freezing

CCS Set point for continuous cycle

COn Compressor ON time with faulty probe

COF Compressor OFF time with faulty

probe

CH Kind of action

DISPLAY

Temperature measurement unit

rES Resolution (integer/decimal point)

rEd Remote display

dLy Display temperature delay

DEFROST

dFP Probe selection for defrost termination

dtE Defrost termination temperature

IdF Interval between defrost cycles

MdF (Maximum) length for 1° defrost

dFd Displaying during defrost

dAd MAX display delay after defrost

AUXILIARY THERMOSTAT

ACH Kind of action for auxiliary relay

SAA Set Point for auxiliary relay

SHy Differential for auxiliary relay

3 x 2mm.

∅

ArP Probe selection for auxiliary relay

Sdd Aux.output working during defrost

ALARMS

XW20K

2,5 mm

≤

2,5 mm

heat-resistant wiring and 6,3mm Faston

≤

10% or 24Vac

85% (no condensing)

Range

LS÷US

0,1÷25,5 °C / 1÷45°F

-50,0°C÷SET / -58°F÷SET

SET ÷ 110°C / SET ÷ 230°F

-12÷12°C /-120÷120°F

n=not present; Y=pres.

-12÷12°C /-120÷120°F

cond.

n=not present; Y=pres.

-12÷12°C /-120÷120°F

0÷255 min.

0÷30 min.

0÷255s

0 ÷ 23h 50 min.

(-55.0÷150,0°C)

0÷255 min.

CL=cooling; Ht= heating

°C ÷ °F

in ÷ de

P1 ÷ 1r2

0 ÷ 20.0 min (10 sec.)

nP; P1; P2; P3; P4

-50,0÷110°C / -58÷230°F

1÷120h

0÷255 min.

rt, it, SEt, dEF, dEG

0÷255 min.

CL; Ht

-50,0÷110°C / -58÷230°F

0,1÷25,5 °C / 1÷45°F

nP / P1 / P2 / P3

1592026000

Default Level

3.0

- - -

2.0

Pr1

-50.0

Pr2

110

Pr2

0.0

Pr1

Pr2

Pr1

Pr2

0.0

Pr2

Pr1

°C

Pr2

Pr1

Pr2

Pr1

Pr2

0,0

Pr2

2,0

Pr2

n, y

Pr2

4/5