tousek / EN_ST-61A_08 / 25. 03. 2020 - 5 -
2. Trac light control STA11 STA 11
Function
The trac light control enables in conjunction with a suitable operator control board (eg ST 61A) the automation and control
of the gate entry and exit through a trac light. At the terminals of the trac light controller separate impulse generators can
be connected for „inside“ and „outside“. The behavior of the trac light control is determined by the settings of the
connected operator control board. These relate to the function of the duration of the green phase and the clearance time, the
trac light at the door position „closed“ (whether or continuous red) and the trac light system logic. Depending on how the
„trac light logic“ was adjusted, after completion of command processing and gate opening, either the side, which has given
the order, or both sides receive the green light. Vehicles can therefore only drive in one direction or both directions entering
the gate area. Furthermore, the trac light controller has the capacity to store incoming transit needs and to work at the end
of the current cycle.
Functional sequence
Trac light
(command giving
side)
Trac light
(counter side)
1
Gate closed
Continuous red function
adjustable via operator control board
selectable
no continuous red OFF OFF
continuous red RED RED
2
opening command (INSIDE or OUTSIDE)
RED RED
Prewarning OPEN is being started (= red trac light warning and possibly
signal light warning before opening the door), duration adjustable via gate auto-
mation control board
> Gate opens after the prewarning time.
3
Gate open (limit position reached)
trac light logic, adjustable via operator control board
selectable
both sides Green GREEN GREEN
one side Green GREEN RED
4
Green phase is started
Duration is adjustable through operator control board
5
Clearance time is started (= time to exit the trac light intermediary region)
Duration of adjustable drive control
RED RED
> Gate closes after clearance time,
cycle starts again ( →
1
)
• if during the closing procedure an impulse is generated, so the gate opens
immediately, and the green phase begins when the opening is completed.
• If a further order from one side is given with trac light logic „both sides Green“ during the green phase/clea-
rance time is given, then the green phase is restarted.
• If a further order from the same side is given with trac light logic „one side Green“ during the green phase/
clearance time, then a restart of the green phase for this side is eected.
• If a further order from the counter side is given with trac light logic „one side Green“during the green phase/
clearance time, then the gate remains after the green phase/clearance time open and the Green display
changes to the counter side.
When the stop button is triggered, the gate stops moving and only opens again with command by either side.