Ascon Tecnologic - T82N- OPERATING INSTRUCTIONS - PAG. 3
4.3
Electrical connections
Carry out the electrical wiring by connecting only one wire to
each terminal, according to the following diagram, checking
that power supply is the same as indicated on the instrument
and the load current absorption is no higher than the maxi-
mum electricity current permitted.
As the instrument is built-in equipment with permanent con-
nection inside housing, it is not equipped with either switches
or internal devices to protect against current overloads: the
installation will include an overload protection and a two-
phase circuit-breaker, placed as near as possible to the in-
strument and located in a position that can easily be reached
by the user and marked as
instrument disconnecting
device
which interrupts the power supply to the equipment.
It is also recommended that the supply of all the electrical circuits
connected to the instrument must be properly protected, using
devices (ex. fuses) proportionate to the circulating currents.
It is strongly recommended that cables with proper insulation,
according to the working voltages and temperatures, be used.
If the iprobes cables are shielded, the protection shield must
to be connected to ground at one side only.
D
Moreover, check that the parameters set are the de-
sired ones and the application works correctly
before
connecting the outputs to the actuators
in order to
avoid malfunctions in the plant that could cause dam-
age to people, things or animals.
4.3.1
Electrical connection diagram
SUPPL
Y
RST (+)
CNT (+)
C (-
)
T82N
OUT2
OUT1
+
-
7A Res.
Out1 8 (3)A 8 (4)A 12 LRA
2 FLA
7A Res.
Out1 8 (3)A 8 (4)A 12 LRA
2 FLA
Relays: 250 V
61810
EN
60730
EN
UL
6
5
4
3
2
1
12
11
10
9
8
7
NC
NO
C
NC
C
NO
Voltage inputs
24 ÷ 240 VAC/VDC
24 ÷ 240
VAC/VDC
5. OPERATING MODE
5.1
Counting commands operation
Counting is enabled and disabled using the the digital inputs
CNT
and
RST
.
The operating mode of
CNT
input is established by
i.Fct
parameter while the
RST
input always acts as a
Reset
, i.e.
blocks
and
resets
the count when it is activated and also
has priority over the other commands (while
RST
is active,
the count cannot start).
The counting
Start
signal can therefore be given by the
CNT
count enable digital input.
The operating mode of
CNT
input can be programmed using
the
i.Fct
parameter to operate in different modes:
i.Fct
=
1
-
Bistable Start/Stop
By activating the
CNT
input the count starts and it is there-
fore possible to deactivate the input. Activating
CNT
again,
the count stops on the value reached (without disabling
the output if this was activated), the next
CNT
impulse
resumes the count from the point it stopped and so on until
the count finishes or a
Reset
command is detected.
CNT
Count
RESET
0 . 1 . 2 . 3 . 4
. 5 . 6 . 7 . 8 . 0
i.fct
=
1
Start
Stop
Start
Stop/
Reset
i.Fct
=
2
-
Bistable Reset-Start/Stop
At the 1
st
impulse on the
CNT
input the timer is reset and
started, at the 2
nd
impulse, if given before the end of the
count, the count is stopped (disabling the output if active)
and the 3
rd
impulse starts a new cycle, otherwise, if the
2
nd
impulse should arrive after the end of the count it
starts directly a new cycle.
CNT
Count
RESET
0 . 1 . 2 . 3 . 4
0 . 1 . 2 . 3 . 0
i.fct
=
2
Reset/
Start
Stop
Reset/
Start
Stop/
Reset
i.Fct
=
3
-
Monostable Start/Stop
Activating the
CNT
input and keeping it active, the count
is started; the count stops on the value reached when
the input is disabled (without disabling the output if ac-
tive); re-activating the
CNT
input, the count restarts from
the value reached and so on until the
Reset
signal is
detected.
CNT
Count
RESET
0 . 1 . 2 . 3
. 4 . 5 . 6 . 7
0
i.fct
=
3
Start
Stop
Start
Stop Reset
