T E R M I N A L
C O N N E C T I O N S
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GsmAlarm-500
Software ver. 1.15
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5-
2.3.
AUXILIARY POWER TERMINAL “AUX”
The auxiliary power supply can be used to power motion detectors and other devices requiring 12
VDC. “AUX” is short-circuit-protected. Max load current is 1.3 A.
2.4.
PROGRAMMABLE OUTPUT TERMINALS “C1”, “C2” and “C3”
The programmable output is a 150 mA maximum switch to ground. A 33 ohm
current limiting resistor is connected in series. A small relay, a buzzer or other
DC operated device may be connected between the “AUX” (positive) terminal
and the “C” (switched negative) terminal on the main board.
Relays with 12V operating voltage and current not exceeding 150 mA max, are
recommended for device control.
Output operating modes are described in Ch. 5.3.2.1
Equivalent diagram of C output
2.5.
BELL/SIREN CONNECTION TERMINALS “K1” and “K2”
These terminals are relay contacts of the programmable output C4. K1 and K2 are used to connect
audio siren or extra-commutated device.
Commutated current may reach 5 A max.
2.6.
“AC” POWER TERMINALS
Use a 16-24 VAC transformer with a minimum 40 VA rating to supply AC power to the
GsmAlarm-500.
2.7.
“BATT” CONNECTOR
Use this connector to connect the backup battery. Max capacity of the backup battery is 1,2 Ah.
Voltage: 12 VDC.
2.8.
EXTERNAL MICROPHONE CONNECTOR
This connector is used to connect an external microphone. Connect white wire to contact M+, black –
to M-. If wire of the microphone is long (over 2 m), it is recommended to use shielded twisted pair
cable. Connect shield to GND contact. In order to avoid interference install microphone as far as
possible from GSM antenna. The microphone turns on automatically in speech mode.
2.9.
RESET BUTTON
RESET button is used to restore factory default settings (see. Ch. 6).
C
3
3
GND
