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AL-85851
EXIT MOTION SENSOR
INSTALLATION AND OPERATING INSTRUCTIONS
1. DESCRIPTION
The
AL-85851
is a passive infrared motion detector specifically designed to release a magnetic
lock from the inside for free egress. Unlike burglar alarm type detectors, the
AL-85851
special features
are
appropriate to this use. The lock control function is fail safe so that
the magnetic lock will safely release if power is cut to the detector. A relay is also present
to send a REX (request to exit) signal to an access control system (if one is present) and
therefore shunt an alarm report. A time extension feature avoids the problem of the unit
resetting if a person momentarily stops moving just before exit. Tight control of the exit
detection pattern allows maximum security from the outside and avoidance of inadvertent
activation from the inside.
Since egress from a magnetically locked door can be a safety issue, make sure you are
complying with local building codes. Contact your building and/or fire prevention
department.
2. PHYSICAL INSTALLATION
2.1 PLACEMENT OF THE UNIT
The
AL-85851
is intended for indoor use only. It is positioned with respect to the inside of the
door so that its detection pattern will “see” a person approaching the door while maintaining
good security from the outside. There are different options as to where the unit is placed
depending on variables in the application.
FIG. 1: PLACEMENT OPTIONS FOR THE SENSOR
FOR TRAFFIC CONTROL
APPLICATIONS, MOUNT THE
SENSOR IN THE CENTER OF
THE DOOR WITH THE
PATTERN AS SHOWN
FOR SECURITY
APPLICATIONS, THE
PATTERN SHOULD SWEEP
ACROSS THE EXIT DEVICE
BUT MISS THE BOTTOM OF
THE DOOR. THE SENSOR IS
POSITIONED BEYOND THE
HINGE SIDE OF THE DOOR
WHEN A DOORKNOB IS
PRESENT IN A SECURITY
APPLICATION, THE
PATTERN CAN BE MADE
MORE NARROW
THE SENSOR CAN BE
POSITIONED AT THE
SIDE FOR SECURITY
APPLICATIONS ON
DOORS AT THE END
OF CORRIDORS
The simplest method of placing the unit is for traffic control applications. A traffic control
application is one where you do not expect any attempt at breaking in from the outside. The
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