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The ITP F22 1 is a device capable of turning on and off at
any distance one or two electric appliances thus allowing to
control systems like burners, air-conditioners, small
irrigation plants through the use of the telephone public line
PSTN (Public Switched Telephone Network).
The interface answers the incoming call after a number of
rings set by the user and is only activated when the internal
four digits secret code exactly matches the one composed
by the user on the telephone keyboard.
The interface also features two input channels, thus allowing
a remote feedback of the state of a certain appliance (i.e. if
it is on or off) or the state of a voltage free contact of a
sensor (like a door or gate sensor, to know if they are open
or closed). The device features an internal digital non-
volatile memory so that it can ’remember’ its state even in
case of a power failure and restore the correct operating
state as soon as the power returns.
Two pushbuttons located on the interface front panel can be
used to change the outputs state as well as to show the
input state. In case the interface is wired on the same line
as that of a fax machine, a special option can be activated:
when this is activated the interface is instructed to answer
after it receives two calls with one ring each.
With this ’trick’ the interface can answer the call before the
fax machine does. On the front panel are also located two
red indicators, used to show the inputs or the outputs actual
state (see further) and one green indicator, whose purpose
is to show the presence of power, an incoming call or the
state of the communication established.
The device can be easily mounted on a wall with the screws
and plastic shells supplied in the package.
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The telephone interface ITP F22 1 answers a phone call
after 2 rings (factory setting) or after a number of rings set
by the user. The interface gives for this an acoustic
feedback with a short music jingle. When the four digits
secret code is composed by the user on the telephone
keyboard, the interface plays a little longer music jingle thus
giving access to all the available configuration and control
commands.
All commands are described in the following parameters; in
case of an error in inputing a command sequence, the
operation can be aborted by pressing ¿so that the
sequence can be composed again.
In case for 5 consequent times the secret code is composed
in a wrong way, the interface automatically terminates the
phone call. The same happens in case for at least 30
seconds no command is issued by the user. Anyway it is
always possible to make a new call.
This telephone interface can be driven also by a mobile
phone or by another device (computer or alarm system),
provided it can issue the correct multi-frequency tones
(DTMF).
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When the sequence ¿ is composed on the keyboard,
the CH1 output relay control mode is initiated.
The interface replies with a deep single note sound in case
the relay is inactive or with a high double note sound in case
it is active. If the key is pressed the relay turns off
meanwhile it is turned on when a is pressed.
Each time the interface receives a command it also replies
with the new state of the relay.
Entering the command ¿ from the telephone keyboard
the CH2 output relay control mode is initiated, which is then
carried out as for channel CH1.
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When the sequence ¿ is entered from the telephone
keyboard an interrogation on the IN1 input state is made.
The interface then replies either with a deep single note
sound when the input contact is open or with a high double-
note sound when it is closed.
When the sequence ¿is entered the IN2 input state is
checked with exactly the same way of operation.
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The command ¿³QXPEHU RI ULQJV´ sets the numer of
rings the interface waits before answering the incoming
phone call. This number can be set from 1 to 10 by simply
pressing the relevant digit on the phone keyboard, except for
10 which is set by pressing the digit .
Examples:
If ¿is composed the interface answers after 4 rings.
If ¿is composed the interface answers after 10 rings.
If the command sequence was correct the interface gives a
successful feedback with a dual-tone sound; in case of
failure instead it gives a single-tone sound. In case of
success the setting of number of rings is stored in memory
and maintained even in case of absence of power.
Note: The factory setting for this parameter is 2 rings.
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The fax option allows to wire the telephone interface on the
same telephone line on which is plugged a fax device or any
other device capable of an autoatic answer to the incoming
calls. The fax option, when enabled, operates in a way that
the telephone interface answers the phone call before the
fax attempts to do the same thing. The interface will then be
able to answer the incoming call in two different ways: either
after the set number of rings or after two consequent calls
each only one ring long.
Let’s suppose that the fax machine is answering after 3
rings: the interface will then be configured for answering after
a greater number of rings and the fax option will be enabled.
In this way all normal incoming calls will be correctly
received by the fax machine.
On the other hand in case the user wants to communicate
with the telephone interface without interference with the fax
machine, he will make a phone call and then, after only one
ring, hang up the line. After about 10 seconds (but within 30
seconds) he will make a new call: this time the interface will
answer the incoming call after the first ring, thus anticipating
the fax machine. With the sequence ¿ the fax option is
disabled, meanwhile with the sequence ¿ the option is
enabled. If the command has been correctly composed the
interface replies with a dual-tone as a positive feedback.
Factory setting for this option is for the fax option disabled.
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The secret code needed to access the interface can be
modified by the user in any moment and is stored and held in
the device even in case of absence of power.
A new secret code (4 numeric digits) can be set by
composing on the keyboard the sequence
¿´QHZFRGH´´QHZFRGH´
The code must therefore composed twice in order to avoid
errors in the sequence input procedure.
As an example, if the user wants to set as new code the
number the sequence to be composed is:
¿.
If the command sequence was correct the interface gives a
successful feedback with a dual-tone sound and stores in its
memory the new code; in case of failure instead it gives a
single-tone sound and the old code remains not modified.
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When the sequence ¿ is composed the communication
is terminated. Anyway the interface provides an automatic
ITP F22 1 010922B4 171104
ITP F22 1 010922C4 171104
end-of-call in case no command is composed in 30 seconds:
in this situation a short sound warns the user when 10
seconds and 5 seconds are left.
In no case the overall duration of the phone call can be
longer than 3 minutes: after this time the call is automatically
terminated. Before the call is terminated a short music jingle
is played. During the communication with the interface, a
short sound (beep) is issued every time is manually
requested a state change in the inputs or in the outputs.
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Inside the interface is located a reset button: when this is
depressed for a few seconds all parameters are reset to the
factory values. The reset is useful in case the user forgets
the secret code.
The reset button can be pressed even without opening the
plastic front cover, by using the tip of a proper screwdriver
from the external. In case a reset is performed the interface
blinks all the front indicators three times.
Factory settings are as follows:
- Number of rings at answer:
- Fax option: 2))
- Secret code:
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On the front panel are located two red LEDs and one green
whose purpose is the following:
- Green LED on: the interface is properly powered and is
waiting for a phone call on the telephone line.
- Green LED quickly blinking: the interface is processing a
phone call ring on the telephone line.
- Green LED slowly blinking: the interface has answered the
phone call and the communication is going on.
- The red LEDs show the state of the CH1 and CH2
outputs . An LED turned on means that the relevant output
is active meanwhile if the LED is off then the relevant
output is inactive.
When both pushbuttons located on the front panel are
pressed simultaneously the LEDs show the state of the
inputs instead. An LED turned on means that the relevant
input contact is closed meanwhile a LED turned off means
that the relevant input contact is open.
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On the front panel of the interface are located two
pushbuttons: CH1 and CH2.
When one of these buttons is pressed the relevant relay
output inverts its state changing from on to off or vice versa,
thus turning on or off the appliance driven by that relay
without the need of a phone call.
In case these buttons are pressed together no change of the
output state will take place; instead this will result in showing
the state of the IN1 and IN2 inputs state through the front
panel indicators.
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For a correct electrical installation of this telephone interface,
folow the wiring diagram sketched in Fig. 3.
At terminals 1 .. 6 the changeover (SPDT) contacts of the
output relays are available.
These contacts are voltage free and can be used to drive
electrical appliances when wired as described in the
diagram. Terminals 7, 8 e 9 are used by the interface as
inputs to acquire a state of an external contact. Terminal 7 is
the common and is internally wired to the power supply
ground. At these terminals can be wired any electrical
contact asshown in the diagram.
By the way it is very important to stress that this contact
must be voltage free; in other words it must be only wired to
the telephone interface and not to any other electrical
appliance. The wiring to the telephone line is made with the
cable supplied with the device.
This cable is provided with standard telephone plugs at each
end. One of the ends must be plugged in the female
connector located on the board inside the interface,
meanwhile the other must be plugged in the telephone
socket located in the installation site.
In case the available telephone socket in not compatible with
the supplied cable a proper adaptor must be used: these
adaptors are usually distributed in electrical shops.
In case the telephone interface requires a different wiring to
the telephone line, it is important to keep in mind that the
device must be wired in parallel to the existing line, therefore
in parallel with other phone line machines.
It is not mandatory to respect the polarity of the wires to be
connected to the telephone line.
The device is powered with 12Vdc: this is made with the
supplied external 230V~/12V power supply whose connector
must be plugged in the connector located on the interface
board as shown in Fig. 3.
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The mechanical installation is carried out by fixing the device
on a wall with two screws, taking advantage of the two holes
with 60 mm. of distance between them.
When tools are used close to the screws holes, particular
attention must be used in order not to damage the
electronics around.
Once the electrical installation has been completed apply
again the front plastic cover to close the case.
Place the plastic front cover on the plastic base paying
attention in that the holes for the indicators located on the
front cover will fit in the relevant LEDs on the board, then
press slightly until the four plastic side teeth snap (2) Fig. 2.
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Power supply: 12V= through mains adaptor
Current absorption: 100 mA
Contacts rating: 2 x 3A @ 250V~ SPDT
Inputs: 2 (voltage free)
Indicators: Green: On - Communication
Red 1 on: Output 1 active
Red 2 on: Output 2 active
Buttons: Manual activation for each
channel (on the cover)
Device reset (internal)
Installation: Wall mount
Protection grade: IP 30
Operating temperature: 0°C .. 40°C
Storage temperature: -10°C .. +50°C
Humidity limits: 20% .. 80% rH
(non condensing)
Case: Material: ABS V0 self-extinguishing
Color: Signal White (RAL 9003)
Dimensions: 85 x 85 x 31 (W x H x D)
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In the view of a constant development of their products, the manufacturer
reserves the right for changing technical data and features without prior notice.
The consumer is guaranteed against any lack of conformity for 24 months
from the time of delivery, according to the European Directive 1999/44/EC.
The full text of guarantee is available on request from the seller.
