Dixell
Installing and Operating Instructions
rel.1.0 –07/03/2002 - cod.
1592013000
1592013000 XM440_460K GB
XM440K & XM460K
5/1
10.
ELECTRICAL CONNECTIONS
The controller of XM series are provided with screw terminal block to connect cables with a cross
section up to 2,5 mm
2
for the connection of RS485(optional), the LAN, the probes, the digital inputs and
the keyboard. Other inputs, power supply and relays connections are provided with Faston connection
(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.
10.1
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.
11.
RS485 SERIAL LINE
XM440K and XM460K are provided (on request) of a direct RS485 connection that allow the unit, to be
linked to a network line ModBUS-RTU compatible as the dIXEL monitoring system XJ500 (Version 3.3).
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).
12.
USE OF THE PROGRAMMING “HOT KEY “
The XM units can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the
“Hot Key” and vice-versa through a TTL connector.
12.1
DOWNLOAD (FROM THE “HOT KEY” TO THE INSTRUMENT)
1.
Turn OFF the instrument by means of the ON/OFF key ,insert the “Hot Key” and then turn the
unit ON.
2.
Automatically the parameter list of the “Hot Key” is downloaded into the controller memory, the
“DoL” message is blinking. After 10 seconds the instrument will restart working with the new
parameters.
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.
12.2
UPLOAD (FROM THE INSTRUMENT TO THE “HOT KEY”)
1.
When the XM unit is ON, insert the “Hot key” and push è key; the "uPL" message appears.
2.
The UPLOAD begins; the “uPL” message is blinking.
3.
Remove the “Hot Key”.
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”.
13.
ALARM SIGNALS
The alarm signals displayed by the keyboard are divided into 2 groups:
1.
the local alarms, which involves all the alarm related to the section directly controlled by the
keyboard
2.
Remote alarms, which involves the alarms related to LAN
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.
13.1
LOCAL ALARMS
Message Cause
Outputs
“P1”
Thermostat probe failure Alarm output ON; SOLENOID VALVE output according
to “COn” and “COF”
“P2”
Evaporator probe failure
Alarm output ON; Other outputs unchanged
“P3”
Auxiliary 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
“EE” Data or memory failure
Alarm output ON; Other outputs unchanged
“EAL” External alarm
Alarm output ON; Other outputs unchanged
“BAL” Serious external alarm
Alarm output ON; Other outputs OFF
“rtc”
Real time clock alarm
Alarm output ON; Other outputs unchanged; Defrosts according to
par. “IdF”
“rtF”
Real time clock failure
alarm
Alarm output ON; Other outputs unchanged; Defrosts according to
par. “IdF
13.2
REMOTE ALARMS
Message Cause
“ASn” Section
n is in alarm with n = LAN address of the section (parameter “Lan”). This alarm
happen when the keyboard is set al “ALL”. This is a generic signal that the section is alarm,
to get detailed information about it set the keyboard to control that section.
“nLn” No link alarm section n with n = LAN address of the section (parameter “Lan”)
“nLn” No link alarm when displaying a remote probe. This alarm appears when the keyboard is
displaying a remote probe (parameter LdS = y)
“rdE” Remote virtual display error. More than one keyboards are set to control remote sections
13.3
SILENCING BUZZER / ALARM RELAY OUTPUT
If “tbA = y”, once the alarm signal is detected the buzzer and the relay are is silenced by pressing any
key.
If “tbA = n”, only the buzzer is silenced while the alarm relay is on until the alarm condition recovers.
Buzzer is mounted in the T640 and V640 keyboards and it’s an option.
13.4
“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.
13.5
ALARM RECOVERY
Probe alarms : “P1” (probe1 faulty), “P2” and “P3”; they automatically stop 10s after the probe restarts
normal operation. Check connections before replacing the probe.
Temperature alarms “HA” and “LA” automatically stop as soon as the thermostat temperature returns to
normal values or when the defrost starts.
External alarms “EAL”, “BAL” stop as soon as the external digital input is disabled.
No link akarms “nLn” and “nLn” automatically stop after the connection with the section is restored.
“RdE” alarm automatically stop when only one keyboard is set as remote virtual display again
14.
TECHNICAL DATA
V640 and T640 keyboards
Housing: self extinguishing ABS
Case: facia 38x185 mm; depth 23mm
Mounting : panel mounting in a 150x31 mm panel cut-out with two screws. Ø
3 x 2mm. Distance between the
holes 165mm
Protection: IP20
Frontal protection: IP65 with frontal gasket mod RG-L (optional)
Connections: Screw terminal block
≤
2,5 mm2 heat-resistant wiring
Power supply: from power module
Display: 3 digits, red LED, 14,2 mm high
Optional output: buzzer
C443 keyboards
Housing: self extinguishing ABS
Case: frontal 32x74 mm; depth 23mm
Mounting: panel mounting in a 71x29 mm panel cut-out
Frontal protection: IP65
Connections: Screw terminal block
≤
2,5 mm2 heat-resistant wiring
Power supply: from power module
Display: 3 digits, red LED, 14,2 mm high.
Optional output: buzzer
Power modules XM440K & XM460K
Case:
“OS”: open board 132x 94 mm; height: 40mm.
“GS”: case 155x114; height 70mm. Self extinguishing ABS. IP55
Connections: Screw terminal block
≤
2,5 mm2 heat-resistant wiring and 6,3mm Faston
Power supply: 230Vac or 110Vac
±
10%
Power absorption: 10VA max
Inputs: 3 NTC probes
Digital inputs: 2 free voltage
Solenoid Valve: relay SPST 8(3) A, 250Vac
light: relay SPST 16(6) A, 250Vac
fans: relay SPST 8(3) A, 250Vac
defrost: relay SPST 20(8) A, 250Vac
Serial output : RS485 optional
Communication protocol: ModBUS - RTU
Data storing: on the non-volatile memory (EEPROM)
Internal clock back-up: 24 hours
Kind of action: 1B
Pollution grade: normal
Software class: A
Operating temperature: 0÷60 °C
Storage temperature: -25÷60 °C
Relative humidity: 20
÷
85% (no condensing)
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
