1592020040 XR40CX GB m&M r1.1 22.06.2012 XR40CX 3/4
OTHER
Adr Serial address (1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
PbC Type of probe: it allows to set the kind of probe used by the instrument: PbC = PBC probe, ntc
= NTC probe.
onF on/off key enabling: nu = disabled; oFF = enabled; ES = not set it.
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display- optional.
dP4 Fourth probe display.
rSE Real set point: (readable only), it shows the set point used during the energy saving cycle or
during the continuous cycle.
rEL Software release for internal use.
Ptb Parameter table code: readable only.
8. DIGITAL INPUT (ENABLED WITH P3P = N)
The free voltage digital input is programmable in different configurations by the “i1F” parameter.
8.1 DOOR SWITCH INPUT (i1F = dor)
It signals the door status and the corresponding relay output status through the “odc” parameter: no,
Fan = normal (any change); CPr, F_C = Compressor OFF.
Since the door is opened, after the delay time set through parameter “did”, the door alarm is enabled,
the display shows the message “dA” and the regulation restarts is rtr = yES. The alarm stops as
soon as the external digital input is disabled again. With the door open, the high and low temperature
alarms are disabled.
8.2 GENERIC ALARM (i1F = EAL)
As soon as the digital input is activated the unit will wait for “did” time delay before signalling the
“EAL” alarm message. The outputs status don’t change. The alarm stops just after the digital input is
de-activated.
8.3 SERIOUS ALARM MODE (i1F = bAL)
When the digital input is activated, the unit will wait for “did” delay before signalling the “CA” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
8.4 PRESSURE SWITCH (i1F = PAL)
If during the interval time set by “did” parameter, the pressure switch has reached the number of
activation of the “nPS” parameter, the “CA” pressure alarm message will be displayed. The
compressor and the regulation are stopped. When the digital input is ON the compressor is always
OFF.
If the nPS activation in the did time is reached, switch off and on the instrument to restart
normal regulation.
8.5 START DEFROST (i1F = dFr)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “MdF” safety
time is expired.
8.6 INVERSION OF THE KIND OF ACTION: HEATING-COOLING (i1F = Htr)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
8.7 ENERGY SAVING (i1F = ES)
The Energy Saving function allows to change the set point value as the result of the SET+ HES
(parameter) sum. This function is enabled until the digital input is activated.
8.8 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
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter, XJ485-CX, to connect the instrument to a monitoring system ModBUS-RTU
compatible such as the X-WEB500/3000/300.
10. X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the HOY KEY
connector. The X-REP output EXCLUDES the serial connection.
To connect the X-REP to the
instrument the following connectors
must be used CAB-51F(1m), CAB-
52F(2m), CAB-55F(5m),
11. INSTALLATION AND MOUNTING
Instrument XR40CX shall be mounted on vertical panel, in a 29x71
mm hole, and fixed using the special bracket supplied.
The temperature range allowed for correct operation is 060 °C.
Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to
probes. Let air circulate by the cooling holes.
12. ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2,5
mm
2
. 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.
12.1 PROBE CONNECTION
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.
13. HOW TO USE THE HOT KEY
13.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push o key; the "uPL" message
appears followed a by flashing “End”
3. Push “SET” key and the End will stop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.
NOTE: the “Err” message is displayed for failed programming. In this case push again o key if you
want to restart the upload again or remove the “Hot key” to abort the operation.
13.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is downloaded into the Controller memory,
the “doL” message is blinking followed a by flashing “End”.
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
“P2” Evaporator probe failure Defrost end is timed
“P3” Third probe failure Outputs unchanged
“P4” Fourth probe failure Outputs unchanged
“HA” Maximum temperature alarm Outputs unchanged.
“LA” Minimum temperature alarm 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 according to rrd
“EA” External alarm Output unchanged.
“CA” Serious external alarm (i1F=bAL) All outputs OFF.
“CA” Pressure switch alarm (i1F=PAL) All outputs OFF
14.1 ALARM RECOVERY
Probe alarms P1”, “P2”, “P3” and “P4” start some seconds after the fault in the related probe; they
automatically stop some seconds 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.
14.2 OTHER MESSAGES
Pon Keyboard unlocked.
PoF Keyboard locked
noP In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
noA None alarm is recorded.
15. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: XR40CX frontal 32x74 mm; depth 60mm;
Mounting: XR40CX panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: XR40CX IP65
Connections: Screw terminal block 2,5 mm
2
wiring.
Power supply: according to the model: 12Vac/dc, ±10%; 24Vac/dc, ±10%; 230Vac 10%,
50/60Hz, 110Vac 10%, 50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14,2 mm high; Inputs: Up to 4 NTC or PTC probes.
Digital input: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250Vac; or 20(8)A 250Vac
defrost: SPDT 8(3) A, 250Vac
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: 2;Software class: A.;
Rated impulsive voltage: 2500V; Overvoltage Category: II
Operating temperature: 0÷60 °C;Storage temperature: -30÷85 °C.
Relative humidity: 2085% (no condensing)
Measuring and regulation range: NTC probe: -40÷110°C (-40÷230°F);
PTC probe: -50÷150°C (-58÷302°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit
16. CONNECTIONS
The X-REP output excludes the TTL output.. It’s present in the following codes:
XR40CX- xx2xx, XR40CX –xx3xx;
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