Hand-operated boom barriers Type GHS
Electrically operated boom barriers Type GES
Electro-hydraulically operated boom barrier Type GEHS
P
erimeter
P
rotection
G
ermany
G
mbH
Document: 2050274
Created: 11.04.2011
Version: a
Changed: 15.08.2013
Page 67 of 93
Original version
Subject to change
7.6.1.8 Synchronous operation
If large driveway widths are to be protected, the two control units of a dual-barrier system are
prepared for an electrical connection that is to be provided onsite. A single command will
then operate both barriers synchronously.
7.6.2 Optional safety devices
7.6.2.1 Photoelectric barrier
A photoelectric barrier is an additional safety device
which can stop an electro-mechanical barrier from
closing.
The control unit can also be
configured for a “stop and
re-
open” mode (see “Putting the Boom Barrier into
Operation
”).
In the final OPEN position, an activated (interrupted)
photoelectric barrier will cause the control system to
ignore any CLOSE command.
7.6.2.2 Safety pressure strips
Depending on the length of the barrier boom, one
or more safety pressure strips can be mounted on
the boom. The safety pressure strips protect the
barrier boom against slamming into an obstacle. If
a safety pressure strip is activated, the closing
operation is immediately interrupted. In addition,
the barrier’s control unit can be configured for
automatic opening of the barrier (auto reversing)
in
such an event (see “Putting the Boom Barrier
into Operation
”).
7.6.2.3 Hold-to-run (dead-man) control (semi-automatic mode of operation)
For closing the barrier, a hold-to-run (dead-man) mode is possible. The electro-mechanical
boom barrier will then continue with any closing motion only as long as the control device
provides an electric signal.
However, opening of the boom barrier will always be in “latch”
mode until the final position is reached.
7.6.2.4 Traffic lights / rotating beacon
In the vicinity of the electro-mechanical boom barriers, traffic lights or rotating beacons can
be installed and their function can be integrated into the barrier control system. Traffic lights
may prove particularly useful if an electro-mechanical barrier is to allow vehicle passage in
Figure 7.9
Photoelectric barrier mounted on
the barrier housing
Figure 7.10
Safety pressure strips mounted on the
barrier boom
