Ascon Tecnologic Srl - X33H
– OPERATING INSTRUCTIONS – MX33HENG00 - PAGE 4
Make a cavity measuring 71 x 29 mm and insert the appliance into
it, holding it in place with the special bracket provided. It is advised
that the special gasket is fitted, so as to obtain the degree of frontal
protection declared. Avoid positioning the internal part of the
appliance in places subject to levels of humidity or dirt that could
cause condensation or allow conductive objects or substances to
enter the appliance. Ensure that the appliance has adequate
ventilation and avoid installation in housings where there are
devices located that could cause the appliance to function outside
the declared temperature limits. Install the appliance as far away as
possible from sources that could generate electromagnetic
interference such as engines, solenoids, relay switches,
electrovalves etc.
3.3 - ELECTRICAL CONNECTIONS
Make the connections attaching only one conductor to each clamp
and following the wiring diagram supplied, checking that the power
supply voltage is the same as that indicated on the appliance, and
that the absorption of the actuators connected to the appliance does
not exceed the maximum current allowed. Given that it is designed
to be permanently connected within an apparatus, the appliance
does not have a power switch, nor is it fitted with internal power
surge protection. The manufacturer hence advises the installation of
a surge protection device and a double-pole switch/disconnector,
labelled as a disconnection device, which interrupts the power
supply of the apparatus. This switch must be positioned as close as
possible to the appliance in a place that is easily accessed by the
user. In addition, it is recommended that the power supply of all the
circuits connected to the appliance with devices (e.g. fuses) be
adequately protected from surrounding currents. Use wires with
insulation appropriate for the voltages, the temperatures and the
working conditions, and ensure that the wires connected to the input
sensors are kept away from power supply cables and other live
wires to avoid electromagnetic interference.
If some of the cables used in the wiring are shielded, it is advised
that they be earthed on one side only. For the version of the
appliance with 12 V power supply, the use of the special TCTR
transformer is recommended, or of a transformer with equivalent
specifications, and it is advised that a separate transformer be used
for each apparatus, as there is no insulation between the power
supply and the input. Finally, the user is advised to check that the
parameters set are the desired ones, and that the application
functions correctly before connecting the outputs to the actuators,
so as to avoid anomalies in the system that could cause damage to
persons, property or animals.
3.4 - ELECTRICAL WIRING DIAGRAM
1 9
B U Z Z E R
IN T E R N A L
O U T 3
7
X 3 3 H
O U T 2
O U T 1
1 6
1 4
1 3
C
1 5
N O
C
N O
1 7
N C
1 8
P r2
2
1
3
P r1
4
5
6
IN P U T S
O U T 4
2 2
2 1
2 0
2 4
2 3
1 0
8
9
1 2
1 1
O u t1 : 1 6 A -A C 1 (6 A -A C 3 )/2 5 0 V A C ;1 H P 2 5 0 V A C ,1 /2 H P 1 2 5 V A C
O u t2 : 8 A -A C 1 (3 A -A C 3 )/2 5 0 V A C ;1 /2 H P 2 5 0 V A C ,1 /3 H P 1 2 5 V A C
L in k T L
-
+
S
N O
C
N O
C
O u t3 ,4 : 5 A -A C 1 (2 A -A C 3 )/2 5 0 V A C ;1 /8 H P 2 5 0 V A C ,1 /1 0 H P 1 2 5 V A C
S U P P L Y
T L L (R S , K e y )
d i1
P r3
(2 w ire s )
4 ..2 0 m A
P A S S IV E
g e n .
e x t.
A C T IV E
0 /4 ..2 0 m A
-
+
+
+
4 ..2 0 m A
A C T IV E
-
1 2 V D C
+
(2 0 m A M A X )
P r4
d i2
d i3
4 - OPERATION
4.1 - ON / STAND-BY FUNCTION
Once connected to the power supply, the appliance can be in one of
2 different states:
- ON: means that the controller actuates the control functions.
- STAND-BY: means that the controller does not actuate any
function, and the display is switched off except for the SET LED.
In the event of loss of power and its subsequent reinstatement, the
system always returns to the state it was in before the power was
cut.
The ON/Stand-by command may be selected:
by pressing the U key for approximately 1 sec. if "USrb" = 4,
by pressing the UP key for approximately 1 sec. if "Fbu" = 4,
by pressing the DOWN key for approximately 1 sec. if "Fbd" = 4,
- through one of the digital inputs if the related “diF” par. = 10
(See also the par. relating to the operation of the keys and the
digital inputs)
4.2 - CONFIGURATION OF THE INPUTS, MEASUREMENT AND
DISPLAY
All the parameters regarding measurement are contained in the
“
]
InP”
group
.
Using the
“SEnt”
par., it is possible to select the type of
temperature sensor (Pr1, Pr2, Pr3) it is wished to use, which can
be: PTC KTY81-121 (Ptc) or NTC 103AT-2 (ntc) thermistors.
Having selected the type of temperature sensor used, the
“Unit”
parameter can be used to select the unit of measurement of the
temperature (°C or °F)
Similarly, with the
“SEnh”
parameter, it is possible to select the
type of input (Pr4) on the basis of the humidity transducer it is
intended to use, which can have a 0..20 mA (0.20) or 4..20mA
(4.20) output.
As regards measuring humidity, it will be possible to set the
"SSCh"
parameter with the value that the appliance must measure in
correspondence with the start of the scale (0/4 mA), and the
"FSCh"
parameter with the value that the appliance must measure
in correspondence with the end of the scale (20 mA).
Using the
“dP t”
parameter, it is possible to establish the resolution
of the desired temperature (OFF=1°; On=0.1°), and likewise with
the
“dP h”
par., that of the humidity (OFF=1%; On=0.1%).
The appliance allows the calibration of the measurements, which
can be used for recalibrating the inputs according to the
requirements of the application, using the
“OFS”
par. (1,2,3,4).
Using the
“FiLt”
par.
(for the temperature measurements)
and the
“FiLh”
par.
(for the humidity measurement), it is possible to set the
time constant of the software filter relating to the measurement of
the values at the input so as to reduce the sensitivity to
disturbances in the measurement (increasing the time).
Using the
“diSU”
par. (for the upper display) and the
“diSL”
par.
(for the lower display), it is possible to establish the normal
messages of the display, which can show: the measurement of the
desired sensor (Pr1, Pr2, Pr3, Pr4), the active temperature set point
(SPt), the active humidity set point (SPh), or it is possible to have
the numerical display switched off (OFF).
Independently of how the “diSU and “diSL” parameters are set, it is
possible to display all the variables measured in turn by pressing
and releasing the
U
key: the display will show the code that
identifies the variable (
Pr 1
,
Pr 2
etc.) and its value.
This display mode is exited automatically after approximately 15
seconds if the U key is not pressed again.
Using the
“Pr 2”
,
“Pr 3”
and
“Pr 4”
parameters, it is possible to
enable (On) or disable (OFF) the measurement inputs whenever the
sensors are not connected.
In relation to the Pr2 and Pr3 inputs, by setting the related
parameters = diG, it is also possible to use these inputs as digital
inputs whose function will be defined by the “diF2” and “diF3”
parameters present in the “
]
din” group (see digital input par.).
Lastly, the user is reminded that the display relating to the Pr1
sensor can also be modified using the display lock function while
defrosting by means of the “dLo” par.
