TEMA TELECOMUNICAZIONI SRL
Doorphone AA-539
MAS-AA539-REV02EN
Page 12 of 57
Telephone section
Current when line is released
< 250µA
Line Impedance
8000
Ω
@ 1KHz
Audio bandwidth
300-3400Hz
Impedance during RING
> 40000
Ω
@ 200..4300Hz, > 5000
Ω
@12..16KHz
RING sensibility
10Vrms @ 25/50Hz
Line voltage / current characteristic
8Vdc @ 20mA
Minimum operating current
line 24Vdc
7.5Vdc @ 15mA @ Line imp. 1200
Ω
line 48Vdc
7.6Vdc @ 18mA @ Line imp. 1200
Ω
Impedance with taken line
According to ETSI ES 203 021
Return loss
According to ETSI ES 203 021, less than -15dBV
Dialing DTMF level
First group -9dBV, second group -11dBV (+/- 2dBV)
DTMF RX sensibility
Better than -30dBV
Dialing tones sensibility
Better than -30dBV
Inputs section with optically isolated acquisition
Insertion type terminals for input
Possibility to use cables up to 1.5mm
2
or AWG16
Number of acquisition inputs
3 distinct with common reference
Type of driving
For each input, acquisition of a voltage-free contact for
connection between the individual input and the commo n
point of the dedicated connector (TB6)
Time to detect the change state
Closing or opening of the external contact for at least 100
milliseconds, any activations for less time will be ignored
Voltage for detection of the state of the
contacts
max 12VDC, the system has this voltage on the input
terminals for detecting the closing of the contacts
Current for detection of the state of the
contacts
max 15 mA, with the contact closed to the common point
Isolation of the input / system circuit
max 1500V, the circuitry of the input section is electrically
isolated from the rest of the circuits of the system
Note: it is not possible, or the system will be damaged, to apply any voltage at the terminal points of the
terminals dedicated to the acquisition of the state of the inputs (TB6)
Note: the individual inputs (including the common point) are not electrically insulated from each other
Camera section (only for AA-539C systems)
Sensor
C-MOS color ¼”
Resolution
420 TV lines
System
PAL
Sensitivity
1 Lux
Viewing angle
Wide-angle 170°
Gain adjustment
Automatic
White balance
Automatic
Video output
Composite video 1Vp-p 75
Ω
Connector
RCA female
Camera grade of protection
IP67