2.2. Main Unit, LED Indicator & Connector Functionality
AC/DC OUT1 OUT2
COM IN3 IN2 IN1
ANT
USB
SIM CARD
G S M
MO DE M
USR
PROG
MIC
F1
DEF
GSM (g)
GSM (r)
STATUS
Main Unit Functionality
ANT
GSM antenna SMA type connector
USB
Mini USB port
SIM CARD
SIM card slot / holder
GSM MODEM
GSM network 850/900/1800/1900 MHz modem
USR
PROG button for setting user telephone numbers
GSM (g)
Green light-emitting diode indicating GSM signal strength
GSM (r)
Red light-emitting diode indicating SIM card status
STATUS
Bue light-emitting diode indicating PROG mode
DEF
Pins for restoring default settings
F1
0.5A fuse
Connector Functionality
AC/DC
Power supply terminals
OUT1
Output C1 terminal
OUT2
Output C2 terminal
COM
Common terminal
IN3
“Low” level (negative) input Z3 terminal; dry NO contact
IN2
“High” level (positive) input Z2 terminal; 5...50 Vdc
IN1
“Low” level (negative) input Z1 terminal; dry NO contact
1