OPERATION

Features

The SL920 Full Systems Capability can operate in a AUTO CLOSE TIMER (TIMER ON) or a PUSH-TO-OPEN/PUSH-TO-CLOSE (TIMER OFF) mode of operation. In the AUTO CLOSE TIMER mode of operation the operator is given a command to open the gate and hold it open until the input is released and until the auto close timer has elapsed at which point the operator will close the gate automatically. In the PUSH-TO-OPEN/PUSH-TO-CLOSE mode of operation each time a signal is sent to the operator, it will cause it to do the opposite of what it did before. (i.e., If the gate is closed, it will start opening, if it is open, it will start closing: If it is closing, it will REVERSE TO OPEN, if it is opening, it will

REVERSE TO CLOSE.)

CONTROLS

The SL920 Full Systems Capability works with the following control devices: Key switches, Push buttons (separate or intercom), numerical key pads and any peripheral equipment which can supply normally open or normally closed contacts as well as optional radio transmitters and receiver (specified by and available from the manufacturer). These contacts can be connected to the operator input terminals to perform the opening, close, safety, or the stop functions.

AUTO CLOSE TIMER

The operator comes factory preset with the auto close timer turned OFF. The auto close timer will close the gate automatically after a specific amount of time has elapsed. The amount of time can be easily adjusted between 0 and 45 seconds by turning a small "pot" located on the right edge of the circuit board (See page 17). The timer can be disabled or activated by flipping a single switch located on the top right edge of the circuit board. If the timer will be used it is recommended that some type of supplementary safety device be installed. If more time is required, there is an extended timer available from the manufacturer allowing up to 100 additional seconds (See Options).

MANUAL RELEASE SWITCH

This simple on-off switch is built into the operator. In an emergency, EVEN WITH THE POWER OFF, the gate can be pushed open manually after flipping the switch from Operate to Release. This switch may also be removed and placed externally from the machine.

GATE SENSITIVITY ADJUSTMENT FOR SYSTEM PROTECTION

The amount of force necessary to stop the gate can be adjusted to conform to the various sizes and weights of any particular gate. When adjusting the sensitivity, the operator can be given only as much energy as is necessary to overcome the resistance of the gate. If the gate should strike an obstruction in either direction, the gate will reverse. If the gate should again strike an obstruction before reaching a limit, the gate will stop, remain stopped, and will sound an alarm. (See page 17)

MASTER AND SECOND

Some very large entrances may require the use of two gates. If this is the case, the two gates can be easily automated using the "master and second" configuration. This configuration uses two gates and two operators in ONE driveway. The operators used are two regular SL920 Full Systems Capability operators one of which is of standard "right hand operation" and the other which is easily converted to "left hand operation" by flipping a single switch located at the top of the circuit board (See page 17).

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