Door Systems Flashcards
Where are DCUs located?
Above LHS of every door
Drivers don’t access
What is the Door Status Loop Circuit?
Electrical circuit that monitors saloon and cab doors to make sure they are closed
It is interlocked with traction to prevent movement if doors are in open position
How do you bypass the Door Status Loop Circuit?
Traction Interlock Bypass Switch
On rear cab wall
What is the APC?
Automatic Passenger Counter
What is ASDC?
Automatic Selective Door Control
What does ASDC do?
Automatically enables and disables doors when train is stopped at a platform
Prevents wrong side and off platform door releases
What is a Balise Beacon?
Yellow bar on the rails on approach to station.
Tells the HCMT:
- Which station
- Length of platform
- Which side the platform is on
- Distance to stopping mark
How does the train read the Balise Beacon?
One beacon reader on each Tc Car.
When do Stopping Aid Cameras come on?
Automatically 10 metres prior to stopping mark
Where does the driver have to stop the train?
With stopping mark between the two red lines - ideally on the green line
What conditions have to be met for the stopping aid cameras to come on?
The beacon that is read must match the expected station in the PIDS control.
This ensures cameras don’t activate when running through express stations
What can you do if stopping aid cameras don’t come on automatically
Manually turn them on with the SDU
What happens if driver selects wrong side doors?
Alarm will appear
Doors will remain locked
What happens if driver over or under shoots platform?
10 metres or more - doors will be unavailable for use and remain grey
Less than 10 metres - ASDC inhibits doors not correctly aligned with platform. Other doors can be released
What does Auto-Door Close Inhibit button do?
Prevents automatic closing of saloon doors after 60 seconds
Applies to selected side of train:
Door 1st and 3rd on Tc
Door 1st on DMp
What happens if passengers continuously press button on door before driver has released them?
Doing it once Causes a delay of 0.5 seconds.
If they keep doing it the door will become inoperative for an extended period
Drivers yellow Door Release button will extinguish for that period of time
What announcement can you make to passengers to assist them to get off the train.
Tell them to stop pressing the button and wait until it turns green
If FDCL continues, what does it mean?
Doors that have not been proved closed … will continue to be illuminated red on the pictogram
How many times can you attempt to close doors?
3 times
Then yellow alert will come up
What is a Substandard Beacon Read?
When one of the two beacon readers fails to read the track mounted Balise Beacon
What will the train do if it gets a substandard beacon read?
Assume platform is shorter and automatically keep either first or last saloon door inhibited when the train stops at platform
What does the driver do in the event of a substandard beacon read?
PA - inform passengers to move to next available door
Operate saloon doors as normal
Report as per FMP
What does driver do if wheelchair ramp needs to be deployed and the first door is inhibited?
Press ASDC Override button
What is ASDC Beacon Read Failure?
Both beacon readers fail to read the track mounted Balise Beacon
or
Balise Beacon is defective
