Application:
Alarm systems
Monitoring of home appliances
Phone dialer, which works with all
conventional models of alarm systems
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For
communication the device uses the GSM
network for calling and the Short Message
Service (SMS) (in future models of the
device).
The device is working with GSM phones
made by Siemens Company, but newer than
C25 and A35 models.
The system has two inputs: IN1 and IN2.
The outputs are also two: OUT1 and OUT2,
which are contact systems of relays.
The contacts' parameters are shown in the
following table. There are one normally
opened and one normally closed contact on
the each output. They are Galvanic
disconnected from the rest part of the
circuit..
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Parameter
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Current
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Contacts
current depends on the voltage
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AC125V
15A
AC250V
10A
DC24V 15A
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Max
current allowed
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20À
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Max
continuous current
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15À
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GCM1000
is a universal, highly effective and
intelligent microprocessor system. One
can use it to monitor climate system,
electric devices, alarms, manufacturing
processes, etc.
Principle of operation.
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Principle of operation.
Connect a
Siemens GSM phone to the phone connector.
It is necessary that the GSM phone must
be a model later than C25, but not A35.
In programming mode it is necessary to
program the phone numbers, which will be
used to control the system..
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After
programming, the system is ready for
work. The phone is connected to the PCB
by a cable. Turn the power on. The red
LED D8 lights up, and this is an
indication that the system is in the
active state, i.e. the inputs are active.
The green LED D5 starts blinking with a
frequency of 1 Hz. This means a correct
circuit initialization and that the
system is ready for work. The outputs are
in a non-active state, and the respective
indication is off (D6 and D7). The relay
contacts are in the marked state. When
any of both inputs became in short
circuit state, the system is brought to
its active state /this is only possible
when D8 lights up/. In this state the
relays are switched and the D6 and D7
light up. The cell phone will dial the
second of the pre-set phone numbers.
After about 20 sec. the OUT2 output will
be deactivated.
The dialing to the number is about 2.5
minutes. After this time the dialing is
stopped and the system starts dialing to
the other pre-set phone number. Only two
phone numbers might be set (programmed)
in the system. This, described state
(sequence) continues for about 10
minutes. For all that time the system
makes 3 dials to one, and 3 more dials to
the second pre-set phone numbers. After
that, the OUT1 output and D6 LED are
deactivated, the dialing is ceased, and
the system leaves this alarm state. If
any of both inputs is activated, the
whole process is repeated.
In any moment a call from one of the two
pre-set phone numbers might cease the
alarm state. If this call continues until
getting of two "No answer"
signals, the IN2 input is deactivated.
The alarm is turned off by a call from
one of the two pre-set phone numbers. The
D7 LED blinks two times with a frequency
of 0.5 Hz approximately. Then D8 LED
turns off and the inputs are active no
more. One can activate the system again
by calling from one of the two pre-set
phone numbers. OUT2 output and D7 are
activated for approximately 0.5 second,
after which D8 LED lights up and the
system is enters the active state. IN1
and IN2 inputs are now active. If during
the activation process the calling
continues until getting two "No
answer" signals, the system is
activated, but the IN2 input is still
inactive.
Operation modes
Programming:
1. Push the pre-programming mode button
(on the cable connecting the system to
the cell phone)
2. Turn on the power supply for the
system
3. D5, D8 and D9 LEDs light up
4. This state is kept until releasing the
pre-programming mode button
5. On releasing the pre-programming mode
button all LEDs light off
6. D8 LED blinks and stays on. This an
indication that the
"Programming" mode is active
7. Program the pre-set phone numbers by
pushing the cell phone's buttons. Don't
forget top turn on tone dialing when
setting these phone numbers. The cable
state must be as shown on fig. 4.
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8. When
pushing any of GSM buttons, D5 LED lights up,
which means "don't push any other button for
a while"
9. After entering 18 digits, which represent two
the 9-digit phone numbers, the system leaves the
"Programming" mode
10. D5 and D8 LEDs light up. The system waits for
the button pushing
11. After the button pushing the system enters
the normal operation mode
Normal operating
mode:
1. The button is not pushed
2. Turn the power on
3. D8 lights up, D5 starts blinking
4. The system is ready for operation
Alarm activation
mode:
1. The system is activated by any of the inputs
only in active mode of operation, which is
indicated by D8 LED
2. By activating any of the two inputs, the
system is turned on, and both outputs are
activated
3. The system dials any of the two pre-set phone
numbers
4. After approximately 20 sec. the OUT2 output is
deactivated
5. After approximately 2.5 minutes the calling is
ceased and the system starts dialing the second
number
6. This state of calling continues for
approximately 10 minutes, in which the system
makes 3 calls to one and 3 calls to the second
phone number
7. After that the outputs are turned off
8. During all that time the activated alarm might
be deactivated by calling from one of the two
pre-set numbers
9. If that calling is longer until getting of two
"No answer" signals, the active state
is ceased and the IN2 input is made inactive
Activation and
deactivation of the system
1. If the system is in inactive state, which is
indicated by D8 LED that is off, the inputs don't
influence to its work
2. The activation is made by one-time call from
one of the two pre-set phone numbers
3. If this call continues until getting of two
"No answer" signals, the system is
activated, but IN2 input is made inactive
4. The deactivation of the system is also made by
calling from one of the pre-set numbers
5. On activation OUT2 output is activated in
about 0.5 sec
6. On deactivation OUT2 output is activated two
times with a frequency of about 0.5 Hz
Notes:
- Activation and deactivation phone numbers, and
also the two phone numbers, which the system will
dial when activating the alarm are one and the
same two by two (all four numbers also might be
one and the same)
- IN2 input might be used to implement a car
alarm system. You can connect the SHOCK sensor to
it. OUT2 output might be connected to the
flashlights and the siren
- The system is absolutely protected against
illegal entering and impact
- The system uses only 9-digit numbers. There is
no need to write leading 0 when entering these
numbers in "Programming" mode.
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