Datcon DT9100 B, Operating Instructions Manual

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DT9100 B
3.2. Principle of operation
Area of application DT9100 B is an intrinsically safe digital clock which enables
accurate time to be displayed in even the most hazardous
plant areas: Zone 1 and 2 or in safe areas.
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 entered during programming.
The DT9100 B has two isolated digital outputs, which can
be used for alarm signalling 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 in
compliance with IP65 for installation in the field or on a
control panel.
Operating principle The clock incorporates a high accuracy temperature
compensated time base, which is processed by a
microcontroller. The microcontroller produces real time in
24 hour HH:MM format, drives a large 4 digit 25.4 mm
height LCD display, processes the front panel keypad and
the synchronising inputs, and drives the digital outputs.
The settings and the actual time are stored in a memory
which stores its content for minimum 15 minutes for
bridging the battery exchange time. The settings can be
done by tree front panel buttons.
The device is operational for at least 15 minutes even if the
power supply is removed.
Power supply The device does not need external power.
Power supply is DT4V5BAT type battery pack.
The battery pack provides the energy for minimum two
years.
Attention! The DT9100 B is powered by only DT4V5BAT
type intrinsically safe replaceable battery pack
(manufactured by Datcon Kft.)!
Do not recharge!
The battery replacement can be accomplishes even in a
hazardous area.
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