Airport Systems
WARNING!
HIGH VOLTAGE is on the energy storage capacitors C1, C2, C3A and C3B when the High Voltage Indicator DS1 indicator is lit! (DS1 is the neon lamp located on the High Voltage & Trigger board - do not confuse the High Voltage Indicator DS1, with the PWR ON lamp DS1.)
It is possible to have high voltage on the energy storage capacitors even if all AC power has been removed from the system, even though the system is designed to drain the energy storage capacitors when power is removed.
3.2.1
The Motherboard has no active components. It provides the necessary connections between the external power and control wires and the Digital and Trigger/High Voltage Cards.
It provides card edge sockets for the
3.2.2
The digital board is responsible for coordinating all the activity within the Flashhead. The microcontroller U6 is the main processing units of the Flashhead. It receives, interprets, acts on, and replies to commands from the Master Controller. It also controls the energy selection relays, reads the manual mode select switches, controls the flashtube triggering, monitors the flash current. In the absence of any signals from the Master Controller, it will autonomously operate the strobe in Day Mode.
The following is a simplified sequence of events from the perspective of the Digital Board:
1.Wait to receive a flash request from Master Controller
2.Wait for next AC
3.Send trigger request signal to
4.Check flash feedback current
5.Transmit a reply to Master Controller if the flash request was addressed to this Flashhead number and flash status is good.
6.Set K1, K2 Relays for next flash mode (Day, Twilight, Night)
7.Update Indicators DS2, DS3
Manual |