|
Screentech has installed Solar LED School
Warning Light system for the 40 Kmh Speed zone in Western
Australia and New South Wales.
In WA we are using 130mm LED Signals
and in NSW we are using 200mm LED Signals, both of these
systems have been trialing for over 12 months.
NSW SCHOOL SIGN |
WA SCHOOL SIGNS |
GENERAL DESCRIPTION
The Screentech School Sign System has three main parts:
- 1. Calendar creation and maintenance
- 2. Field utility
- 3. The signs themselves
The Screentech School Sign System has
the following components:
Calendar creation and maintenance -
this is a computer program that can run on any standard
desktop computer - it can also run on the laptop needed
by the "Field Utility" program.
The Calendar creation and maintenance
program prepares a file containing on/off days and times
that are copied to the Field utility.
Field utility - this is a computer program
that sends the file containing the on/off days and times
into each of the signs. This is intended to run on a laptop
computer that can be easily carried from one sign to the
next.
LED Signs - these contain the lamps that
alert drivers.
School Sign Specifications
- Electrical Characteristics
- LED drive current (per LED) MAX 30mA - Lamps to driven
by constant current
- 100mm LED Aspects
- 200mm LED Aspects
- Controller Current (Lamps off)
- Controller Current (Lamps on)
- Calendar Updates/Clock setting Via RS232 (connector
is an RJ12 with a supplied RJ12 to DB9)
- Firmware Updates
- Real time clock +/- 1 sec maximum deviation per week
- +/- 60 sec maximum deviation per year
- +/- 3 sec maximum deviation when setting clock Calendar
size 1 year + 2 months
- Flash sequencing cycles of up to 8 events
- Each event > 0.125sec and < 3 sec
- Each event allowing 0, 1 or 2 lamps to be on
- On-period control 4 on periods per day including
weekends
- Day exceptions any day on the calendar will be capable
to being set as a "school day" or holiday
independently of any other events like school-terms/holidays
etc
- Daylight saving support Facilitated by using one
or more additional on-periods with the times offset
in the required directions by the required amount
- Feedback and Interrogation The system will allow
the current calendar, date/time to be retrieved via
RS232.
- Operating temperature -25 C ~ +60 C
- Solar Powered
- Battery Back up
|
