EXTA
Automation
buildings
PRODUCTS EXTA - BUILDING AUTOMATION
SCHOOL BELL CONTROLLER 24-250V AC / 30-300V DC TYPE: SDM-10/U
Product Description
The SDM-10 school bell controller is designed
for acoustic signalling control at schools using
the school bells (e.g. DNT-212, DNS-212, DNT-
212M, DNS-212M). The system control runs in
an automatic mode according to the preset program.
Program setting is operated by means of
selecting the lesson duration, breaks duration and
defining the beginning hour. The system is ready
to implement some specials functions (alert bells,
short lessons) by means of programmable control
inputs. The controller may be manufactured as a
kit for assembling, EW-01 Electronic School Bell.
In case of power supply malfunction the unit
battery sustain enables all settings saving and
maintaining.
for acoustic signalling control at schools using
the school bells (e.g. DNT-212, DNS-212, DNT-
212M, DNS-212M). The system control runs in
an automatic mode according to the preset program.
Program setting is operated by means of
selecting the lesson duration, breaks duration and
defining the beginning hour. The system is ready
to implement some specials functions (alert bells,
short lessons) by means of programmable control
inputs. The controller may be manufactured as a
kit for assembling, EW-01 Electronic School Bell.
In case of power supply malfunction the unit
battery sustain enables all settings saving and
maintaining.
PRODUCT FUNCTIONAL FEATURES:
- Easy time table programming algorithm
- Bell ringing duration setting possible
- 30 ÷ 300 V Relay output — two changeover contacts
- LCD display LED illumination.
- Easy lesson time changeover: normal / short
- Alert bells programming possible 2 control inputs for running programmed functions
- maximum load 16 A
- RTC circuit and built-in calendar
- Two power supply versions: 230 V or 24 ÷ 250 V
- Clock and program data battery sustain
- two relay outputs with max Load capacity 16 A.
Mounting method Szyna DIN
Number of memory locations 400
Number of channels 1
Width in number of modular spacings 1
Degree of protection (IP) IP20
Power supply terminals A1, A2
Rated supply voltage 24-250 V
Executed programs year around bell controller
Rated temperature - 20/60 °C
Rated frequency 50/60 Hz
Operating mode manual, automatic
Accuracy of timing t maximum ±1 s / 24 h at temperature 25 °C
Parameters of relay contacts 2 NO/NC-16 A/250 V AC1 4000 VA
Protection degree IP20
Width 90 mm
Height 35 mm
Depth 66 mm
Weight 0,15 g
Summer / winter time change automatic, manual
Length of packaging 4 cm
