C O N N E C T O R S A N D L E D S
_________________________________________________________________________________
GsmAlarm-420 Software ver. 1.05
- 4 -
2
.2
k
+3V
GND
Z
PROCESSOR
2.
CONNECTORS AND LEDs
SIGNAL
Z1
Z2
Z3
Z4
MO DE
ALARM
RESET
C ontact
Microphone
Input
L E D Indicators
G S M A L A R M - 4 2 0
Se nsor Inputs
"
-
"
SIM C ARD
Programmable
O utputs
Power Supply
Input AC/DC,
16-24V
DC Supply O utput
(12V or 6V)
GND Z1
Z2
Z3
Z4
Z5 M-
M+ C 1
C2
BELL
AUX
B+
GND
PO WER
ANTENNA C O NNEC TO R
R
e
d
-
+
B
lu
e
Backup
Batte ry
Input
GsmAlarm-420 connection contacts and LED indicators
2.1.
INPUTS Z1-Z5
Inputs Z1-Z5 are used to connect sensors of protected zones. The
inputs can operate in a “loaded input” mode or in a “zero-one”
mode (see Ch. 5.3.1.2). The “loaded input” mode is
recommended to be used for protection of premises. In this case
all the inputs have to be loaded with 2,2k
Ω
resistors. The system
becomes triggered both when the monitored input circuit is
broken as well as when it is short-circuited.
In the second case the system is triggered after breaking or short-
circuiting of the monitored input circuit (depending on the
programmed "active" level).
Equivalent diagram of input
Input Z5 is used to arm/disarm the system. System can be armed by applying active level to Z5. After
the delay time passes, the system starts checking the monitored inputs; in the case of alarm it
activates the siren, calls and sends SMSs. After Z5 level is changed, the system is disarmed and
responds to no zone changes (except when the monitored zone is operative 24 hours per day).