Three Four Stages Digital Controllers
with Multi Probe Input
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
• This manual is part of the product and should be kept near the instrument for easy and quick reference.
• The instrument shall not be used for purposes different from those described hereunder. It cannot be
used as a safety device.
• Check the application limits before proceeding.
1592002250
1.2
• Check the supply voltage is correct before connecting the instrument.
• Do not expose to water or moisture: use t he controller only withi n the operating limit s avoiding sudden
• Warning: disconnect all electrical connections before any kind of maintenance.
• The instrument must not be opened.
• In case of failure or faulty operation send the instrument back to the dist ributor or to “ DIXELL S.p.A”
• Consider the maximum current which can be applied to each relay (see Technical Data).
• Ensure that the wires for probes, loads and the power supply are separated and far enough from each
• In case of applications in industrial environments, the use of mains fil ters (our mod. FT1) in parallel with
SAFETY PRECAUTIONS
temperature changes with high atmospheric humidity to prevent formation of condensation
(see address) with a detailed description of the fault.
other, without crossing or intertwining.
inductive loads could be useful.
2. GENERAL DESCRIPTION
The XT151D and XT160D (DIN RAIL format) are three (XT151D) or four (XT160D) stage ON/OFF
controllers for temperature, humidity and pressure applications with direct or inverse action, userselectable. The analogue input type can be set by paramet er between the f ollowing, according to the
model:
- PTC, NTC;
- PTC, NTC, Pt100, Thermocouple J, K, S;
- 4÷20mA, 0÷1V, 0÷10V.
3. FIRST INSTALLATION
3.1 PROBE SETTING
The pre-set probe type is written on the label of the instrument,
see picture. If it is different from the probe that has be used, set
the probe following procedure below
3.1.1 How to set the probe.
1. Enter the programming menu by pressing the SET+ nfor 3s.
2. Select the Pbc (Probe configuration) parameter and push the SET key.
3. Set the kind of probe:
a. Controller for temperature: Pt= Pt 100, J = J thermocouple, c = K thermocouple, S
= S thermocouple; Ptc = PTC; ntc = ntc.
b. Controller with current or voltage inputs: cur=4÷20mA, 0-1= 0÷1V, 10= 0÷10V
4. Push the SET key to confirm it.
5. Switch the controller off and on again.
NOTE: Before proceeding check and, if necessary; set with appropriate values the Minimum Set
Points (LS1 e LS2) and Maximum Set Points (US1 e US2). See also th e paragraphs concerning
the programming.
4. REGULATIONS
4.1 3 OR 4 INDEPENDENT OUTPUTS (OUC=IND)
3 or 4 independent control stages (ouC=ind): output #1 at direct (S1C=dir) or inverse (S1C=in)
action; output #2 at (S2C = dir) direct or inverse (S2C =in) act ion, output #3 at (S3C = dir) direct or
inverse (S3C =in) action, output #4 (only for XT160D) at (S4C = dir) direct or inverse (S4C =in)
action.
E.I. with OUC = ind, S1C = dir (cooling), S2C = dir (cooling), S3C = dir (cooling), S4C = dir
(cooling).
4.2 3 OR 4 DEPENDENT OUTPUTS (OUC=DIP)
With dependent control stages (ouC=diP) SET2 and SET3 are related to SET1:
therefore SET2 is: SET1+SET2, while SET3 = SET1 + SET3
output #1 with direct or inverse action according to the S1C parameter; output # 2 with direct or
inverse action according to the S2C, output #3 with direct or inverse action according to the S3C,
output #4 (only for XT160D) with direct or inverse action according to the S4C.
E.I. 3 outputs OUPUTS (XT151D) with ouC=diP (dependent), S1C = dir (cooling), S2C = dir
(cooling), S3C = dir (cooling).
5. FRONT PANEL COMMANDS
KEY COMBINATIONS:
o + n To lock & unlock the keyboard.
SET + n To enter in programming mode.
SET + o To return to the room temperature display.
SET: To display and modify target set
points; in programming mode it
selects a parameter or confirm an
operation.
TO SWITCH THE INSTRUMENT
ON/OFF: If the function is enabled
(par. onF=yES), by pressing the
SET key for more than 4s the
controller is switched OFF. To
switch the instrument on again
press the SET key.
o UP: in programming mode it browses
the parameter codes or increases
the displayed value. Hold it pressed
for a faster change
nDOWN: in programming mode it
browses the parameter codes or
decreases the displayed value. Hold
it pressed for a faster change
5.1 USE OF LEDS
A series of light points on the front panels is used to monitor the loads controlled by the instrument.
Each LED function is described in the following table.
LED MODE FUNCTION
ON Output 1 enabled
ON Output 2 enabled
ON Output 3 enabled
ON Output 4 enabled – Only for XT160D
Flashing - Programming Phase (flashing with LED1)
- Programming Phase (flashing with
ON Energy saving activated by digital input
ON - ALARM signal
- In “Pr2” indicates the parameter is also present in “Pr1”
Installing and Operating Instructions
)
5.2 TO SEE AND CHANGE THE SETPOINTS
1. Push and release the SET key the St1 label will be displayed
3. To change the Set value push the o or n arrows within 10s.
4. To confirm the new value and pass to the next SET push the SET key.
5. Repeat the points 2, 3 and 4 to change the next set point.
TO EXIT: Press SET + UP or wait 15s without pressing a key.
2. Push again the SET key to see point value;
5.3 TO ENTER THE PARAMETERS LIST “PR1
To enter the parameter list “Pr1” (user accessible parameters) operate as follows:
1. Push for 3s the SET + DOWN keys (LED1 & 2 start blinking).
2. The controller will display the first parameter present in the Pr1 menu..
5.4 TO ENTER THE PARAMETERS LIST “PR2”
The “Pr2” parameter list contains the configuration parameters. A security code is required to enter it.
1. Enter the “Pr1” level, see above paragraph.
2. Select “Pr2” parameter and press the “SET” key.
3. The “PAS” flashing message is displayed, shortly followed by “0 - -” with a flashing zero.
4. Use o or n to input the security code in the flashing digit; confirm the f igure by pressing
“SET”.
The security code is “321”.
5.If the security code is correct the access to “Pr2” is enabled by pressing “SET” on the last digit.
Another possibility is the following:
After switching ON the instrument, within 30 seconds, push SET and DOWN keys together for 3s:
the Pr2 menu will be entered.
5.5 HOW TO MOVE A PARAMETER FROM THE “PR2” MENU TO “PR1” AND
VICEVERSA.
Each parameter present in “Pr2” MENU can be removed or put into “Pr1”, user level, by pressing
“SET + n”.
In “Pr2” when a parameter is present in “Pr1” the LED
is on.
5.6 HOW TO CHANGE A PARAMETER
To change a parameter value operates as follows:
1. Enter the Programming mode
2. Select the required parameter.
3. Press the “SET” key to display its value.
4. Use “UP” or “DOWN” to change its value.
5. Press “SET” to store the new value and move to the following parameter.
TO EXIT: Press SET + UP or wait 15s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.
5.7 HOW TO LOCK THE KEYBOARD
1. Keep pressed for more than 3 s the o and n keys.
2. The “POF” message will be displayed and the keyboard will be locked. At this point it will be
possible only to see the set point or the MAX o Min temperature stored
3. If a key is pressed more than 3s the “POF” message will be displayed.
5.8 HOW TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the o and n keys, till the “Pon” message will be
displayed.
5.9 ON/OFF FUNCTION
TO SWITCH THE INSTRUMENT ON/OFF: If the function is enabled (par. onF=yES), by pressing
the SET key for more than 4s the controller is swit ched OFF. To switch the instrument on again
press the SET key.
Hy1 Intervention differential for set point1 (-Full Sc. / Full Sc.). It can be set with positive value or
with negative value. The kind of action depends on the S1C parameter: dir = direct or in =
inverse.
Hy2 Intervention differential for set point2: (-Full Sc. / Full Sc.). It can be set with positive value
or with negative value. The kind of action depends on the S2C parameter: dir = direct or in =
inverse.
Hy3 Intervention differential for set point3: (-Full Sc. / Full Sc.). It can be set with positive value
or with negative value. The kind of action depends on the S3C parameter: dir = direct or in =
inverse.
Hy4 Intervention differential for set point4 (only fo r XT160D): (-Full Sc. / Full Sc.). It can be set
with positive value or with negative value. The kind of action depends on the S4C parameter:
dir = direct or in = inverse.
LS1 Minimum set point1: (Down Sc.÷ Set1) Sets the minimum acceptable value for the set point1.
LS2 Minimum set point2: (Down Sc.÷ Set2) Sets the minimum acceptable value for the set point2.
LS3 Minimum set point3: (Down Sc.÷ Set3) Sets the minimum acceptable value for the set point3.
LS4 Minimum set point4 (only for XT160D): (Down Sc.÷ Set4) Sets the minimum acceptable value
for the set point4.
US1 Maximum set point1: (Set1÷ Full Sc.) Sets the maximum acceptable value for set point1.
US2 Maximum set point2: (Set2÷ Full Sc.) Sets the maximum acceptable value for set point2.
US3 Maximum set point3: (Set3÷ Full Sc.) Sets the maximum acceptable value for set point3.
US4 Maximum set point4 (only for XT160D): (Set4÷ Full Sc.) Sets the maximum acceptable value
for set point4.
ouC Output connections (diP=dependent; ind=independent) select if SET2, SET3 and SET4
(only for XT160D) is independent from SET1 or if the SET2 and other sets depend on SET1 (so
S1C=dir direct action (cooling / dehumidifying /decrease pressure).
S2C Action type output 2: S2C=in inverse action (heating/ humidifying /increase pressure);
S2C=dir direct action (cooling / dehumidifying /decrease pressure).
S3C Action type output 3: S3C=in inverse action (heating/ humidifying /increase pressure);
S3C=dir direct action (cooling / dehumidifying /decrease pressure).
S4C Action type output 4 (only for XT160D): S4C=in inverse action (heating/ humidifying
/increase pressure); S4C=dir direct action (cooling / dehumidifying /decrease pressure).
AC Anti-short cycle delay: (0÷250 sec) Minimum time between the switching off and the following
switching on
on Minimum time a stage stays switched ON (0÷250 sec)
ono: Minimum time between 2 following switching ON of the same load (0÷120 min).
ALC Alarms configuration: it determines if alarms are relative to set point1 or referred to absolute
values.
rE relative to set point1; Ab absolute temperature
ALL Minimum alarm:
with ALC=rE: relative to set point1, (0÷|Down Sc.-Set1|) this value is subtracted from the set
point1. The alarm signal is enabled when the temperature goes below the “SET1-ALL” value.
with ALC=Ab absolute temperature, (Down Scale ÷ ALu) minimum alarm is enabled when the
temperature goes below the “ALL” value.
ALU Maximum alarm:
with ALC=rE: alarm relative to set point1, (0÷|Full Sc.-Set1|) Maximum alarm is enabled when
the temperature exceeds the “SET1+ALU” value.
with ALC=Ab: absolute alarm, (ALL÷Full Sc.) Maximum alarm is enabled when the
temperature exceeds the “ALU” value.
ALH Temperature alarm for alarm recovery: (0,1÷Full scale) Differential for alarm reset, always
positive.
ALd Alarm delay:(0÷999 min) time interval between the detection of an alarm condition and alarm
signalling.
dAo Delay of alarm at start-up: (0÷23.5h) time interval between the detection of t he alarm condition
after instrument power on and alarm signalling.
tbA Status of alarm relay after pushing a key. (XT151D only): oFF = relay disabled; on = relay
enabled.
AS Alarm relay configuration (XT151D only): cL = 5-6 terminals open with alarm; oP = 5-6
terminals closed with alarm.
So1 Output 1 status with faulty probe: So1=oFF open; So1=on closed.
So2 Output 2 status with faulty probe: So2=oFF open; So2=on closed.
So3 Output 3 status with faulty probe: So3=oFF open; So3=on closed.
So4 Output 4 status with faulty prob e (o n ly for XT160D): So4=oFF open; So4=on closed.
LCI Start of scale, only with current or voltage input: (with rES = in, dE, cE: -99.00÷199.00, with
rES=irE -999÷1999) Adjustment of read out corresponding to 4mA or 0V input signal.
UCI End of scale, only with current or voltage input (with rES = in, dE, cE: -99.00÷199.00, with
rES=irE -999÷1999) Adjustment of read out corresponding to 20mA or 1V or 10V input signal.
oPb Probe calibration: (-999÷999) allows to adjust possible offset of the probe.
rES Resolution: select the resolution of the controller.
in= integer (-99÷199);
dEC= 1 decimal point (-99.0÷199.0),
cE = 2 digits after the decimal point (-99.00÷199.00)only for current or voltage input
irE = integer, large scale (–999÷1999) only for current or voltage input
WARNING: if rES is changed from “irE” to another value, all the parameters values expressed
P3F Third wire presence for Pt100 probe: for using 2 or 3 wires Pt100 probes: no = 2 wires
probe; yES = 3 wires probe.
ANALOG OUTPUT - OPTIONAL
AOC Analog output configuration: (only for models with analog output)
AOC=Pb Probe reading. The analog output parameters LAO and UAO are indipendent and
correspond to the absolute read-out probe signal.
AOC=Er Probe - Set Point1. The analog output parameters LAO and UAO are related to the
difference between measurement of the probe and Set Point 1.
LAO Lower analog output limit: (only for models with analog output) minimum value of
temperature associated to the 4mA analog output. This value can be absolute or relative to the
Set Point 1 by setting the AOC parameter.
UAO Upper analog output limit: (only for models with analog output) maximum value of
temperature associated to the 20mA analog output. This value can be absolute or relative to
the Set Point 1 by setting the AOC parameter.
SAO Analog output safety with probe fault: (only for models with analog output) determines
what state the analog output should assume when the probe is faulty:
SAO = oFF; analog output = 4mA
SAO = on; analog output = 20mA.
DIGITAL INPUT
HES Set poin t 1 changes durin g the Energy Saving cycle: (Down Sc./Full Sc.) sets the variation
of the set point 1 during the Energy Saving cycle.
i1F Digital input operating mode: configure the digital input function: c-H = to invert the kind of
action: direct - reverse; oFF = to switch the controller off.; AUS = Not used; HES = Energy
Saving; EAL = generic external alarm; bAL = serious external alarm: it switches
off the loads.
i1P Digital input polarity:
CL : the digital input is activated by closing the contact;
OP : the digital input is activated by opening the contact
did Digital input alarm delay: (0÷120 min) delay between the detection of the external alarm
condition (i1F= EAL or i1F = bAL) and its signalling.
OTHER
Adr RS485 serial address (0÷247) identifies the instrument within a control or supervising system.
onF Swithching ON/OFF enabling from keyboard: (no = disabled; yES=enabled) It permits the
switching ON/OFF of the instrument by pressing the SET key for more than 4s.
Ptb Parameters table: (read only) Shows the code of the parameters map.
rEL Software release: (read only)
Pr2 To access the Pr2 parameter programming menu.
Installing and Operating Instructions
8. INSTALLATION AND MOUNTING
Instruments XT160D, XT151D, shall be mounted on an omega DIN rail.
The temperature range allowed for correct operation is 0÷60 °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.
9. ELECTRICAL CONNECTIONS
The instruments are provided with screw terminal block to connect cables with a cross section up to
2
2,5 mm
. Before connecting cables make sure the power supply complies with the instrument’s
requirements. Separate the input connection 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. SERIAL CONNECTIONS
All models can be connected to the monitoring and supervising system XJ500 using the serial port.
The external XJ485 serial module to interface the instrument with the monitoring and supervising
system XJ500 is required.
The standard ModBus RTU protocol it is used.
11. HOW TO USE THE HOT KEY
11.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON
appears followed a by flashing “End”
3. Push “SET” key and the End will stop flashing.
4. Turn OFF
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.
the instrument remove the “Hot Key”, then turn it ON again.
, insert the “Hot key” and push o key; the "uPL" message
11.2 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 of f and then
on if you want to restart the download again or remove the “Hot key” to abort the operation.
12. DIGITAL INPUT
The controllers have 1 free contact digital input. It is programmable in 5 different configurations by
the “i1F” parameter.
1592002250
12.1INVERT THE KIND OF ACTION: HEATING-COOLING (I1F = C-H)
This function allows to invert the regulation of the controller for bot h the outputs: from direct to
inverse and viceversa.
12.2 REMOTE ON/OFF (I1F = OFF)
This function allows to switch ON and OFF the instrument.
12.3 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.
12.4 SERIOUS ALARM MODE (I1F = BAL)
When the digital input is activated, the unit will wait for “did” delay before signalling the “bAL” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is deactivated.
12.5 ENERGY SAVING (I1F = HES)
The Energy Saving function allows to change the set point1 value as the result of the SET1+ HES
(parameter) sum. This function is enabled until the digital input is activated.
13. ALARM SIGNALS
Message Cause Outputs
“PFo” Probe broken or absence Alarm output ON; Output 1 and 2 according
“PFc” Probe short circuited Alarm output ON; Output 1 and 2 according
“HA” Maximum temperature alarm Alarm output ON; Other outputs unchanged.
parameters “So1” and “So2” respectively.
parameters “So1” and “So2” respectively.
13.1 ALARM RELAY STATUS
Status of the instrument XT151D
Instrument off 13-14 open 13-14 open
Normal operating 13-14 open 13-14 closed
Alarm present 13-14 closed 13-14 open
AS = CL AS= oP
13.2 SILENCING BUZZER / ALARM RELAY OUTPUT
Once the alarm signal is detected the buzzer, if present, can be disabled by pressing any key.
XT151D: the alarm relay status depends on the tbA parameter: with tbA=yES the relay is disabled by
pressing any key, with tbA=no the alarm relay remains enabled as long as the alarm lasts. The
display signal remains as long as the alarm condition remains.
13.3 ALARM RECOVERY
Probe alarms “PFo”, “PFc” start few seconds after the fault in the probe; they automatically stop few
seconds after the probe restarts normal operation. Check connections before replacing the probe.
Max. and min. alarms “HA” and “LA” automatically stop as soon as the variable returns to normal
values.
Alarms “bAL” and “EAL” recover as soon as the digital input is disabled.
14. TECHNICAL DATA
Housing: self extinguishing ABS.
Case:XT160D, XT151D: 4 DIN modules 70x85 mm; depth 61mm.
Mounting: XT160D, XT151D: DIN RAIL
Protection: IP20.
Connections: Screw terminal block ≤ 2,5 mm
Power supply: 24Vac ± 10%; or 230Vac ± 10%, 50/60Hz or 110Vac, ± 10%, 50/60Hz
Power absorption: 3VA max.
Display: 3 ½ digits, red LED
Inputs: according to the order: NTC/PTC or NTC/PT C /Pt100 /Thermocouple J, K, S or 4÷20mA/
Alarm: (XT151D), 8(3)A, 250Vac
Other output: buzzer (optional)
Kind of action: 1B.; Pollution grade: normal;
Software class: A.; Data storing: on the non-volatile memory (EEPROM).
Operating temperature: 0÷60 °C (32÷140°F); Storage temperature: -30÷85 °C (-22÷185°F).
Relative humidity: 20÷85% (no condensing)
Measuring and regulation range: according to the probe
Controller Accuracy a 25°C: better than ±0,5% of full scale