The Electronic School Janitor is
a schoolbell control unit, ready to
work, using the SDM-10 device. The
set is designed for modernization or
preparing a new bell system. The
EW-01 includes a switch disconnector,
bellcontroller, relays connected in
parallel, special purpose buttons for
switching into the short lessons mode
and an alarm button with an acoustic
signalling. The SDM-10 controller is
the main control part of the system.
The controller is designed for school
acoustic signalling control by means
of bells (e.g.: DNT-212, DNS-212,
DNT-212M, DNS-212M of ZAMEL).
The system control runs in an automatic
mode according to the preset
algorithm. The program preparing is
being held by means of entering lesson
and break times, and beginning
time. The system is ready to implement
some specials functions (alarm
bells, short lessons) by means of
programmable control inputs.
NOTE:
The system controls 230 V AC
bells.It is possible to use 8 and
24 V AC bells with the TRM-8 or
TRM-24 doorbell transformers of
exta series.