Preparing the Installation
11
Doc 01-G0665
Rev C
ONE BUTTON CONTROL (SEQUENCE OF OPERATION)
The one button control can be programmed to function as an open command unless on the open
limit, where it becomes a close button.
DIGITAL MICROPROCESSOR
This is the main circuit board for the operator. It contains all the logic and intelligence for the
system. All the system programming is done on this circuit board. See page 21. It is solid state
and contains an emergency back-up system that works even if the processor is missing.
INHERENT OBSTRUCTION PROTECTION
The limit shaft is equipped with an R.P.M. sensor. When the gate meets an obstruction, the loss
of r.p.m’s will cause the gate to reverse. A second obstruction will cause the gate to stop and
alarm. A renewed wired (supervised) input will restart the gate.
EXTERNAL OBSTRUCTION CIRCUIT
This circuit can be used with either a gate edge or a photo beam system. When either of the two
devices mentioned are activated, the operator will react in a similar manner to the inherent
obstruction described above.
NOTE:
If external entrapment protection is required by the class of operator, both an
open and close protection device must be used.
SPECIAL NOTE ABOUT OBSTRUCTION SENSING FROM EITHER INTERNAL OR
EXTERNAL SYSTEMS
The operator will stop if it senses two sequential obstructions.
"
If two (2)
external
obstructions occur, any control input (e.g., stop button, safety loop,
etc.) will override the obstruction sensor and return the operator to its normal operation.
"
If two (2) obstructions occur, with at least one
internal
(e.g., an inherent obstruction
such as the R.P.M sensor), the gate will not activate from any automatic system,
including the built in time delay to close. Either a manual device such as a pushbutton
within line of site of the gate and operator or the stop button supplied with the operator
must be activated to return the operator to its normal operation.
OPEN ONLY CIRCUIT
Separate open circuits for line-of-sight devices and out-of-sight devices such as open loops or
radio controls.
LOOP CONTROL CIRCUITS
Vehicle control devices such as reversing loop detectors are connected to this circuit.
TIME DELAY TO REVERSE CIRCUIT
Allows the gate to come to a complete stop before reversing direction. Approximately ½ second
between stop and reverse.
NOTE:
This feature is defeated when either the inherent or external obstruction circuits
are activated.
