1592026000 XW20K GB R2.0 08.06.2011.doc
XW60K
4/5
9.9
DIGITAL INPUTS POLARITY
The digital input polarity depends on the i1P parameter:
i1P=CL: the input is activated by closing the contact.
i1P=OP: the input is activated by opening the contact
10
INSTALLATION AND MOUNTING
T620 keyboard shall be mounted on vertical panel, in a 150x31 mm hole, and fixed using two screws
3 x 2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod. RG-L).
V620 keyboard shall be mounted on vertical panel, in a 72x56 mm hole, and fixed using two screws
3 x 2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod. RGW-V).
CX620 keyboard shall be mounted on vertical panel, in a 29x71 mm hole, and fixed using the special
bracket supplied.
The controller XW20K shall be mounted in a din rail
It must be connected to the keyboard by means of a two-wire cable (
1mm). The temperature range
allowed for correct operation is 0 to 60°C. Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to probes. Let the air circulate by the
cooling holes.
10.1
XW20K – 8 DIN CASE - DIMENSIONS
11
ELECTRICAL CONNECTIONS
XW20K is provided with screw terminal blocks to connect cables with a cross section up to 2.5 mm
2
for
the RS485 (optional) and the keyboard. Connecting other inputs, power supply and relays, XW20K is
provided with Faston connections (6.3mm). Heat-resistant cables have to be used. Before connecting
cables make sure the power supply complies with the instrument’s requirements. Separate the probe
cables from the power supply cables, from the outputs and the power connections. Do not exceed the
maximum current allowed on each relay, in case of heavier loads use a suitable external relay.
NOTE: the maximum current allowed for all the loads is 20A.
11.1
PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place the thermostat probe away from air streams to correctly
measure the average room temperature. Place the defrost termination probe among the evaporator
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.
12
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).
13
HOW TO: USE OF THE PROGRAMMING “HOT KEY”
PROGRAM A HOT-KEY FROM AN INSTRUMENT (UPLOAD)
1.
Program one controller with the front keypad.
2.
When the controller is ON, insert the “HOT-KEY” and push UP button; the “uPL” message
appears followed a by a flashing “End” label.
3.
Push SET button and the “End” will stop flashing.
4.
Turn OFF the instrument, remove the “HOT-KEY” and then turn it ON again.
NOTE: the “Err” message appears in case of a failed programming operation. In this case push again
button if you want to restart the upload again or remove the “HOT-KEY” to abort the operation.
PROGRAM AN INSTRUMENT BY USING A HOT-KEY (DOWNLOAD)
1.
Turn OFF the instrument.
2.
Insert a pre-programmed “HOT-KEY” into the 5-PIN receptacle and then turn the Controller
ON.
3.
The parameter list of the “HOT-KEY” will be automatically downloaded into the Controller
memory. The “doL” message will blink followed a by a flashing “End” label.
4.
After 10 seconds the instrument will restart working with the new parameters.
5.
Remove the “HOT-KEY”.
NOTE: the message “Err” is displayed 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.
14
ALARM SIGNALS
Message Cause
Outputs
“P1”
Thermostat probe failure
Alarm output ON; Compressor output according to
parameters Con and CoF.
“P3”
Probe 3 probe failure
Alarm output ON; Other outputs unchanged
“P4”
Probe 4 probe failure
Alarm output ON; Other outputs unchanged
“HA”
Maximum temperature alarm
Alarm output ON; Other outputs unchanged
“LA”
Minimum temperature alarm
Alarm output ON; Other outputs unchanged
"HA2"
Condenser high temperature
It depends on the AC2 parameter
"LA2"
Condenser low temperature
It depends on the bLL parameter
“dA”
Door open
Compressor and fans restarts
“EA”
External alarm
Output unchanged.
“CA”
Serious external alarm (i1F=bAL) All outputs OFF.
“CA”
Pressure switch alarm (i1F=PAL) All outputs OFF
“EE”
Data or memory failure
Alarm output ON; Other outputs unchanged
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 3 sec.
14.1
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.
14.2
“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.
14.3
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.
15
Technical data
Keyboards
Housing: self extinguishing ABS
Case: T620 and T620T: facia 38x185 mm; depth 23mm
V620: facia 72x56 mm; depth 23mm
CX620: facia 75x36 mm; depth 23mm
Mounting: T620T panel mounting in a 150x31 mm panel cut-out with the 2 metal brackets supplied.
T620: panel mounting in a 150x31 mm panel cut-out with two screws.
3 x 2mm. Distance
between the holes 165mm
V620: panel mounting in a 56x72 mm panel cut-out with two screws.
3x2mm. Distance
between the holes 40mm
CX620: panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: IP65 with frontal gasket
Connections: Screw terminal block
2.5 mm
2
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
2.5 mm
2
heat-resistant wiring and 6.3mm Faston
Power supply: 230Vac or. 110Vac
10% or 24Vac
Power absorption: 10VA max
Inputs: 3 NTC or PTC 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 degree: normal
Software class: A
Operating temperature: 0 to 60°C (32 to 140°F)
Storage temperature: -25 to 60°C (-13 to 140°F)
Relative humidity: 20 to 85% (no condensing)
Measuring and regulation range:
NTC probe: -40 to 110°C (-58 to 230°F)
PTC probe: -50 to 150°C (-58 to 302°F)
Resolution: 0.1°C or 1°C or 1°F (selectable)
Accuracy (ambient temp. 25°C): ±0.5°C ±1 digit
16
CONNECTIONS
16.1
XW20K
