Centurion D2 Turbo Installation Manual page 57

There is a default two second delay before
the gate opens. This is to warn the
pedestrian that the gate is about to move.
It will also give the person enough time to move their hand away if they are reaching
through the gate to operate a keyswitch or a keypad .
If the Courtesy Light (page 58) is connected to the D2 Turbo control card, it will flash
indicating that the gate will open approximately one metre.
The gate will close after a default time of five seconds.
The gate can be kept open by keeping a trigger on the input (keeping your key in the
keyswitch, for example) – once removed the gate will close after the default but
adjustable five seconds.
If a Closing Safety Beam (page 54) is fitted and the beam is broken while the gate is
closing, the gate will stop and open to the Pedestrian Opening position. The gate will
remain open while the beam is broken and the five second (fixed) Autoclose Delay will
only commence once the beam has been cleared.
For safety reasons it is recommended that all Pedestrian Keyswitches and
keypads are installed on the opposite end of the gate to where the operator is
installed
21.1.5. Safety Beam(s) (optional, but recommended)
It is always recommended to connect additional safety mechanisms to the
D2 Turbo/D2 Turbo Low-Voltage instead of relying only on the inherent anti-crushing
protection, referred to above. The typical device is an infrared Safety Beam which can
detect the presence of any vehicle, person or pet that breaks the beam and
communicates back to the D2 Turbo that something is in the path of the gate.
Another option is an Inductive Loop Detector, which is mounted in the ground, adjacent
to the gate, which is very effective at detecting vehicles or the like, but not persons or
pets.
page 53
FIGURE 77.