SecurAccess Compact – User Guide 39
13.4. Heating resistor
The unit is fitted with a heating resistor useful for keeping it as dry as possible in very humid or (and)
cold conditions as well as with condensation conditions.
An external power supply (24 to 37 Volts DC or AC – 35 mA) is needed to turn on the heat from the
resistor. See diagram below.
!
13.5. Dry contact
This feature can be used to drive a video recording system, a light, an alarm, etc.
It provides a dry NC contact when the unit is off-hook.
Speaker overboost, buttons and label display backlight as well as the heating
resistor need an external power supply.
If all of the 3 should be used together, one power supply will be enough
provided that it complies with the specifications indicated below and be
connected as shown.
Overboost and Leds powe
A) TRT3 (TNV-3) access : Overboost and Leds
access (12-32 Volts DC/AC 50Hz 100 mA.
B) TRT3 (TNV-3) access :
Door latch relay contact :
NO/NC and up to 60 VA and 2A maximum
C) TRT3 (TNV-3) access : Heating resistor :
24 to 37 Volts DC/AC 50 Hz 35 mA
D) TRT3 (TNV-3) access : Telephone line
E) TRT3 (TNV-3) access : dry contact closed
when off-hook. Up to 50 Volts DC/AC 50 Hz
100 mA
NO
NC
LED / BOOST
Leds and
Overboost
switches
(OFF =
deactivated
To Next Page
Loading...
