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TERMINALS DESCRIPTION
SUPPLY
+ -
GSM
IN COM
Force
LINE
L1 L2
PHONE
T1 T2
TAMPER
GSM FAIL
PSTN FAIL
BATT FAIL
LIFE TEST
KEY SW1
JP5
Note: the O.C. outputs when active give a ground voltage
LED FUNCTION
The following 3 LEDs provide systems status informations:
YELLOW
This LED gives the GSM link status: after startup this LED blinks to indicate that the system
is trying to login the GSM network.
GSM
Once logged the LED is turned OFF if the PSTN line is available and is turned to a steady
STATUS
ON status is the PSTN line is not available.
When the system is working on the GSM network (outgoing call or SMS or incoming SMS)
the LED blinks.
GREEN
This LED indicates the GSM signal strength. At system startup it blinks together with the yel-
low LED then it blinks according to the GSM signal strength:
GSM
1 blink and 1 pause: signal absent or too weak (if this condition is stable it is
SIGNAL
reccomended not to use this system)
LEVEL
2 blinks and 1 pause: sufficient signal
3 blinks and 1 pause: good signal
RED
This LED blinks when a system failure occurs (GSM out of order or network not available,
SIM card locked, low battery level). If the problem is related to GSM network the RED and
SYSTEM
the YELLOW LEDs will blink simultaneously.
NOTE: the battery status can be tested only when the voltage on the terminals "SUPPLY" is
STATUS
absent.
www.amcelettronica.com
13.8Vdc power supply
When terminal "IN" is closed to terminal "COM", all outgoing calls are
forwarded to the GSM network even if the PSTN line is available.
Remark: in this case, an incoming call from the PSTN line will not be received and the
system will result in the free condition but will not generate any ring to the connected
alarm unit
Connections to the PSTN line
PSTN simulated line terminals to connect to the alarm system
The terminal are directly connected to the TAMPER on-board switch
O.C. output active when the GSM line is not available
O.C. output active when the PSTN line is not available
O.C. output active when the battery is discharged
O.C. output for life test signal
parameters reset key
Nou used
3
IT-2000
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