AST Feb 2020 Magazine AST Feb 2020 Magazine | Page 23

www.AmericanSecurityToday.com
February 2019 - Edition 41
Automatic Systems BLG 76 is actually a rising fence barrier, offering a robust alter-
native to a sliding gate, with advantages in terms of speed and ground footprint.
Automatic Systems
Syste ms redesigned
these gates to implement the
necessary entrapment pro-
tection needed to comply with
the UL 325 standard, which re-
quires that, after sensing an
obstruction, , reversing
obstruction
r eversing must
begin within two
t wo seconds.
seconds .
After the first contact, the gate
must reverse and travel a mini-
mum of two inches.
inches .
If a second contact is detected by
a Type A device (inherent sen-
sor), the gate must stop only
and not reverse.
If a second contact is detected
This requirement is intended to by Type B1 or B2 device (pho-
keep a person from being en- toelectric sensor or edge sensor),
trapped in a stationary position the gate must stop but may also
by the gate system.
reverse..
reverse
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