Glossary - Centurion D2 Turbo Installation Manual

6. Glossary

DOSS: Digital Origin Seeking System. An opto-electronic system that counts pulses in

order to determine the position of the gate and the distance that it needs to travel to
its respective endstops
IRBO: Opening infrared Safety Beams. If the opening beams are interrupted while the

gate is in the closed position, it will prevent the gate from opening. If they are
interrupted while the gate is travelling in the open direction, it will stop and close the
gate. It will have no effect upon a closing gate
 IRBC: Closing infrared Safety Beams. If the closing beams are interrupted while the
gate is in the open position, it will prevent the gate from closing. If they are
interrupted while the gate is closing, it will stop and open the gate. It will have no
effect upon an opening gate
 PIRAC Mode: Passive infrared Autoclose Mode. This feature allows the gate to close
automatically as soon as a vehicle or pedestrian has passed through the closing beam.
This security feature ensures that the gate stays open for the minimum amount of time
possible
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