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
What happens during a ASDC Beacon Read Failure?
Doors will be inhibited
Stopping Aid Cameras will fail
eTIS will raise alert informing driver to override
How does ASDC Override Button work?
Determine which side platform is on and press corresponding ASDC button
No alarm will be given if incorrect side is overridden
TMS will indicate the chosen side as green on the pictogram
What is the ASDC Override Procedure?
PA - short delay before doors released
SDU - observe cameras to ensure leading and rear cars aligned with platform
Door - open cab door on platform side to confirm platform available, close cab door
Button - press ASDC Override button on correct side
- Select first car
- Select last car
- Accept selection
- Check Green door indications on HMI are correct
- Press door release for platform side
- Report fault to Metrol
Where are the DERs?
Every saloon door
External - RHS
What are DERs also referred to as?
EED - Emergency Egress Device
What are external DERs also referred to as?
EAD - Emergency Access Device
When is the DER not available?
When train is stabled
When HCMT is remotely started
What happens when DER is pulled when train in motion?
Intercom and CCTV activated
Level 3 EED alert on affected door on SDU
eTIS will determine whether stationary or in motion, if in motion door will remain locked
What happens when DER pulled when train is stationary?
Exam … how long?
Intercom and CCTV activated
Level 3 alert on HMI
Driver has 20 seconds to allow or inhibit door release
Level 2 alert - With 10 seconds remaining
If no action taken DER will be available to manually open door
What does the DER Inhibit Button do?
Exam… how long does it inhibit for
Press to inhibit opening of doors by DER for 120 seconds
Can be pressed multiple times
Timer resets to 20 seconds if train moves off and becomes stationary again
Driver can make DER available by pressing Cancel DER Inhibit button at any time
What happens when external DER is activated?
Level 1 Alert
Driver must acknowledge alert on HMI
How do you Reset the door after a DER has been pulled?
Reset the handle
Manually open door and push shut with momentum
Return to cab and press door close button
Check HMI and confirm door is closed
What does the cab EAD do?
Exam … how long?
Button located adjacent to cab door which allows door to be opened from outside in event of emergency
Hold down for 10 seconds
Can driver override cab EAD?
How long for?
Yes
Press EAD Override button
“Car Release Inhibit” button
Inhibits for 5 minutes
Where are the IFDs?
DMp - No.2 end
DT - No.1 end
Can passengers open fire doors if they are close?
Yes - prior to temperature reaching 120c
When are the fire doors closed?
When smoke is detected or train is stabled
Where are Beacon readers in train?
One on each Tc car
