Ascon Tecnologic - TT70 - USER MANUAL - PAG. 1
TT70
MULTIRANGE AND
MULTIFUNCTION
DIGITAL TIMER
User manual
23/04 - Code: ISTR_M_TT70_E_00_--
ASCON TECNOLOGIC S.r.l.
Viale Indipendenza 56, 27029 - VIGEVANO (PV) ITALY
TEL.: +39 0381 69871 - FAX: +39 0381 698730
http:\\www.ascontecnologic.com
e-mail: [email protected]
PREFACE
D This manual contains the information necessary for
the product to be installed correctly and also instruc-
tions for its maintenance and use; we therefore recom-
mend that the utmost attention is paid to the following
instructions and to save it.
This document is the exclusive property of Ascon Tecnologic
S.r.l. which forbids any reproduction and divulgation, even
partially, of the document, unless expressly authorized.
Ascon Tecnologic
S.r.l. reserves the right to make any formal
or functional changes at any moment and without any notice.
Ascon Tecnologic S.r.l. and its legal representatives do not
assume any responsibility for any damage to people, things
or animals deriving from violation, wrong or improper use or
in any case not in compliance with the instrument features.
D Whenever a failure or a malfunction of the device
may cause dangerous situations for persons, thing
or animals, please remember that the plant has to be
equipped with additional electromechanical devices
which will guarantee safety.
1. INSTRUMENT DESCRIPTION
1.1 General description
TT70 is a digital microprocessor timer with direct reading
analogue setting and is equipped with 2 relay outputs.
The instrument only counts down and displays the count
status via a LED bar and a 3-digit display.
The timer has 2 relay outputs whose status is pointed out
by 2 LEDs, it is also equipped with an internal memory
(with LED light) to resume counting in the event of a power
failure and a buzzer to signal the count end.
This model has 2 functions (01, 02), 60 s ÷ 6 h time base,
memory, internal buzzer, 24 VAC/DC operating voltage and
is equipped with an “octal” socket.
1.2 Front panel pescription
R1
R2
sh
06
15
3
24
888
m
Mem
6
2
1
5
3
7
4
8
1 Setting knob;
2 Timing index (attached to the setting knob) for precise
selection of the time range to be set;
3 3-digit display (shows the time remaining to count end);
4 21 LEDs bar graph (graphically displays the time remain-
ing to count end);
5 R1 LED: Indicates the status of R1 relay output;
6 R2 LED: Indicates the status of R2 relay output;;
7 s, m, h LEDs: Indicate the selected Time unit;
8 Mem LED: Indicates if the memory function is active.
2. PROGRAMMING
2.1 Time count setting
The time delay is set by turning the knob and pointing
the red pointer at the desired timing. The time scale in
use, seconds, minutes or hours, is selected using the DIP
Switches located on the side of the instrument and is dis-
played by one of the 3 LEDs located on the instrument dial
(item n° 7 in the description of the front panel).
Ascon Tecnologic - TT70 - USER MANUAL - PAG. 2
2.2 Operating parameters
The operating parameters can be set using the 8 DIP
Switches located on the body of the instrument. To have
access to the DIP Switches it is necessary to remove the
plastic protection cover with a small screwdriver.
D It is recommended to remount the plastic cover to pro-
tect the timer circuitry from dust or other contaminants.
1234 5678
Functions Time
01
456ON
OFF
02
456ON
OFF
60 sec
23 ON
OFF
6 h
23 ON
OFF
6 min
23 ON
OFF
60 min
23 ON
OFF
7
ON
OFF
7ON
OFF
8ON
OFF
8ON
OFF
Memory
Buzzer
Note: The parameter setting must be carried out when the
instrument is not powered.
2.2.1 DIP Switch 1 - Not used
2.2.2 DIP Switch 2 and 3 - Time unti
To select one of the 4 time units (60 s, 6 minutes, 60 minutes
or 6 hours), use DIP switches 2 and 3.
Time
60 sec
23
ON
OFF
6 h
23
ON
OFF
6 min
23
ON
OFF
60 min
23
ON
OFF
2.2.3 DIP Switch 4, 5 and 6 - Outputs Operation
To select the operating mode of the outputs, act on DIP
switches 4, 5 and 6.
Functions
01
456
ON
OFF
02
456
ON
OFF
The single operating modes of the outputs and the timer
models associated with them will be described in the follow-
ing paragraphs.
2.2.4 DIP Switch 7 - Enabling the memory function
To enable the memory function and allow timing to restart
in the event of a power failure, use DIP switch 7. The memo-
ry status is indicated by the Mem LED (placed to the right of
the 3-digit display). When memory is enabled the LED is ON.
7ON
OFF
7ON
OFF
Memory
ON OFF
2.2.5 DIP Switch 8 - Enabling the Buzzer
To enable the count end buzzer use DIP switch 8. The buzz-
er status is not signalled
.
8ON
OFF
8ON
OFF
Buzzer
ON OFF
3. USAGE WARNINGS
3.1 Admitted use
D The instrument has been projected and manufactured
as a measuring and control device to be used accord-
ing to
EN61010-1
at altitudes operation below 2000 m
.
Using the instrument for applications not expressly permitted
by the above mentioned rule must adopt all the necessary
protective measures.
The instrument MUST NOT BE USED in dangerous environ-
ments (flammable or explosive) without adequate protections.
D The installer must ensure that the EMC rules are
respected, also after the instrument installation, if
necessary using proper filters.
4. INSTALLATION WARNINGS
4.1 Mechanical mounting
The instrument, in a DIN 72 x 72 mm container, is designed
for panel mounting inside an enclosure.
Make a 60 x 65 mm (L x H) hole and insert the instrument,
fixing it with the appropriate screw type brackets.
–Avoid installing the instrument in places with high humidity
which can generate condensation or with dirt which can
lead to the introduction of conductive substances into the
instrument.
–Ensure adequate ventilation to the instrument and avoid
installation in containers that house devices which may
overheat or which may cause the instrument to function at
a higher temperature than the one permitted and declared.
–Connect the instrument as far away as possible from
sources of electromagnetic disturbances such as motors,
power relays, relays, solenoid valves, etc..
Ascon Tecnologic - TT70 - USER MANUAL - PAG. 3
4.1.1 Dimensions and panel cutout [mm]
R1
R2
Mem
smh
06
15
3
24
888
60
Panel cutout
65
12.4 64.6
3.5
77
72
72
63.6
14.4
1
2
3
4
5
6
7
8
4.2 Electrical connections
Carry out the electrical wiring by connecting only one wire to
each terminal, according to the following diagram, checking
that the power supply is the same as that indicated on the
instrument and that the load current absorption is no higher
than the maximum 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 cir-
cuits connected to the instrument must be protect properly, us-
ing 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.
Furthermore, the input cable of the probe has to be kept sepa-
rate from line voltage wiring.
If shielded cables are used, it is recommended to connect
the protective braid to earth at one side only.
D Before connecting the outputs to the actuators we
strongly recommend that a check should be made that
the parameters are those desired and that the applica-
tion functions correctly, so as to avoid malfunctioning
that may cause irregularities in the plant that could
cause damage to people, things or animals.
4.2.1 Electrical wiring diagram
ZTT70 with “Octal” socket
AR1 AR2
27413 586
V
Sc. 857
16 A 250 V AC1
5. OPERATION
5.1 Operation of counting commands
The timer operation is managed solely by the supply voltage.
The cycles are started by supplying power to the instrument.
5.2 Model 857 - Outoput operation
This instrument has 2 output operating modes and can be
selected via DIP Switches 4, 5 and 6. The instrument has no
control inputs.
5.2.1 Mode 01-- Outputs operation
01 —
V
AR1
t
AR2
DIP Switch
position
456ON
OFF
By powering the timer, relay 1 (AR1) is instantaneously
energized and the count starts decreasing. When time t
elapses, relay 2 (AR2) is energized.
Remove and re-power to start a new cycle.
5.2.2 Mode 02--
Outputs operation
02 —
V
AR1
t
AR2
Posizione
DIP Switch
456ON
OFF
DIP Switch
setting
By powering the timer, relay 1 (AR1) and relay 2 (AR2) are
instantaneously energized and the count starts decreas-
ing. When time t elapses, both relays are de-energized.
Remove and re-power to start a new cycle.
Ascon Tecnologic - TT70 - USER MANUAL - PAG. 4
6. PROBLEMS AND MAINTENANCE
6.1 Cleaning
It is raccomended to clean the instrument only with a cloth
welted with water or with a detergent neither abrasive nor
containing solvents.
6.2 Disposal
The appliance (or the product) must be
disposed of separately in compliance
with the local standards in force on
waste disposal.
7. WARRANTY AND REPAIRS
The instrument is under warranty against construction vices or
defected material, noticed within 18 months from delivery date.
The warranty is limited to the repairs or to the substitution
of the instrument. The eventual opening of the housing, the
violation of the instrument or the wrong use and installation
of the product means the automatic decay of the warranty.
In case of defected instrument, noticed in warranty period or
out of warranty, do contact our sales department to obtain
the shipment authorisation.
The defected product must be shipped to Ascon Tecnologic with
the detailed description of the failures found and without any
fees or charge for Ascon Tecnologic, safe different agreements.
8. TECHNICAL DATA
8.1 Electrical data
Power supply: 24 VAC/VDC ±10%;
AC frequency: 50/60 Hz;
Power consumption: 24 VDC 2.5 W,
24 VAC 4 VA;
Outputs: Up o 2 relays outputs SPDT (10 A-AC1);
Relay output electrical life: 100000 operations;
Overvoltage category: II;
Protection class against electrical shocks: Front in class II;
Insulation: Reinforced insulation between low voltage parts
(power supply and relay outputs) and front panel.
8.2 Mechanical characteristics
Housing: Self-extinguishing plastic, UL 94 V0;
Heat and fire resistance category: D;
Protection degree: IP54 for indoor use in accordance with
EN 60070-1;
Terminals protection: IP20 for indoor use in accordance
with EN 60070-1;
Dimensions: DIN 72 x 72 mm, depth 91.4 mm;
Weight: About 270 g;
Mounting: Incorporated flush in panel in a 60 x 65 mm hole;
Connections: Octal socket;
Terminals (on the socket): Screw terminals for
0.2 ÷ 2.5 mm2/AWG 24 ÷ 14 cables;
Pollution degree: 2;
Operating temperature: -10 ÷ +55°C (14… 131°F);
Operating humidity: 30 ÷ 95 RH% with no condensation;
Storage temperature: -25 ÷ +65°C (-13… 149°F).
8.3 Functional features
Outputs operation:
2 programmable operating modes: 01 e 02;
Time range: 4 programmable timing scales:
–60 seconds,
–6 minutes;
–60 minutes;
–6 hours.
Display resolution: According to the scale used: hours, min-
utes, seconds;
Overall accuracy: ±0.1 fs;
Display: 3 red digits, character height 7 mm;
Compliance: CE.
9. HOW TO ORDER
XX: FUNCTIONALITY (WIRING DIAGRAM)
57 =
857 Scheme
TTT: TIME BASE
06B = 6 s, 6 m, 60 m, 6h
YY: POWER SUPPLY
24 = 24 VAC/VDC
MODEL
TT70- = Timer with analog knob
57 2406BTT70-
-
1
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2
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3
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