Principle Of Operation - Datcon DT9100 B Operating Instructions Manual

Area of application
Operating principle
Power supply
8

3.2. Principle of operation

DT9100 B is an intrinsically safe digital clock enable
accurate time to be displayed in even the most hazardous
plant areas: Zone 1, 2 or in the safe area.
Synchronising function allows the clock to be synchronised
with a master clock. Connecting synchronising terminals
together will stop the clock. When the terminals are
disconnected the clock will re-start from a new time selected
in the programme menu. This may be the nearest minute or
the nearest hour of the original display or a preset time may
be entered during programming.
The DT9100 B has two isolated digital outputs, which can
be used for alarm signaling or for synchronising other
clocks.
The clock is powered by a replaceable intrinsically safe
battery pack.
DT9100 B is housed in a moulded polycarbonate case
hauseproof to IP65 for installation in the field or on the
control panel.
The clock incorporate a high accuracy temperature
compensated time base, which is processed by a
microcontroller. The microcontroller produces the real time,
in 24 hour HH:MM format, drives the large 4 digit 25,4 mm
height LCD display, process the front panel keypad, the
synchronising inputs, and drives the digital outputs. The
settings and the actual time are stored in a memory which
stores it's content for cca. 1 hour for bridging the battery
exchange time.
The DT9100 B is powered by the built in DT4V5BAT type
intrinsically safe replaceable battery pack, which will
operate the clock for at least two years.
The battery replacement can be accomplish even in the
hasardous area.
DT9100 B
20140130-V0