Wallace Perimeter Security ALPHA - Page 146

146
wallaceperimetersecurity.comPhone: 866.300.1110
OPERATION NOTES
• A thru-beam sensor is generally more powerful and able to funcon reliably with dirty opcs and in
poor weather.
• A retro-reecve sensor does not require the installaon and extra wiring of a separate emier and
receiver as is required in a thru-beam system, but retro-reecve eyes are generally more problemac
in poor weather. Avoid using retro-reecve devices across outdoor distances greater than 24 feet
(7.3m) because of performance and reliability issues.
Mount thru-beam type photo eyes approximately 15” to 30” (.38m to .76m) above the ground and as
close to the gate as possible. A minimum of two photo eyes are required, one photo eye to guard the
open direcon and the other for the close direcon of travel, unless gate edges for entrapment protecon
are installed. Mount the emiers and the receivers just beyond the travel of the gate in both the full open
and full closed posions of travel. The installaon locaons described above are intended for pedestrian
detecon. If photo eyes are to be used for vehicular detecon, install a low elevaon photo eye for cars
and another photo eye at a height of about 55” (140cm) to detect semi-trucks.
Figure 43. Connecons for Entrapment
Protecon Only
If the photo eye has an internal switch for
seng Light Operate vs. Dark Operate, select
Light Operate. If the photo eye has a relay
output and has both NO and NC terminals, some
experimentaon may be required to determine
the proper connecon. This is because, in the
Light Operate mode, the output relay is normally
energized and releases when the beam is blocked.
Some manufacturers label an output as NO, when
it is actually an NC contact. If the photo eye has a
solid-state output you must choose a sinking type
connecon.
Three wires to the receiver and two wires to the
emier are all that is required.
• Depending on how the photo eyes are to be
wired, +24VDC or +12VDC, power is provided
via spades located just to the right of the COM
terminal strip near the le side of the board.
Wire all eyes to 24V or all to 12V; do not mix
voltages.
• The receiver common wire is connected to the
SENSOR COM terminal at the boom le of
the SmartDC Controller. The emier common
wire is connected to the COM terminal at the
top le of the controller.
• The photo eye NC output wires connect to the
SmartDC Controller at the appropriate Sensor
Input (1, 2, or 3).
If photo eyes are to be used for
vehicle detecon and logically
funcon the same as a vehicle
detector, connect the common wires
to the COM terminals on the le
side of the board and wire the NO
output contact to the appropriate
vehicle detector input: EXIT LOOP,
IN OBS LOOP, and OUT OBS LOOP.