Wallace Perimeter Security SPEEDGATE - Safety Devices; Open & Close Cycle; Inherent Entrapment Sensor

26
wallaceperimetersecurity.comPhone: 866.300.1110
SAFETY DEVICES
Safety Devices
Open & Close Cycle
Before any gate movements commence the gate must have an audible warning me (a minimum of 2
seconds), during which the audible device (horn, siren or bell; a buzzer) is acvated. The excepon is,
of course, if the gate reverses there will be no clear me. The audible alarm is factory set to connue to
pulse during the movement of the gate. If required, the alarm can be programmed to only acvate during
entrapment and fault events.
“Renewed command” means that a command (such as an open or close command) that was present at
the me of obstrucon detecon must be ignored. An example of this could be a Card Reader that has a
strike me of 8 seconds. If the gate begins to open and detects an obstrucon, it is to reverse closed and
remain there. The input from the Card Reader (assuming it is sll present) will be ignored. Only if the
contact is released and then made again will a new open or close cycle be started.
Inherent Entrapment Sensor
The SpeedGate is equipped with a Type A inherent entrapment sensor (IES) that complies with UL 325
Safety Standards. The IES responds to any impediment to gate travel by causing the gate to stop and
reverse.
The SpeedGate IES and obstacle detector is a reduced speed sensor/torque change sensor, the absolute
encoder located under the brake disconnect switch in each gate column. The IES senses the posion
of the gate for gate operaon and reduced speed sensing when the gate has come into contact with an
obstrucon. Addionally, the IES monitors torque via acceleraon and deceleraon.
Ulizing the parameters explained in “Gate Sengs: Obstacle Detecon” on page 114, the force exerted
by the gate leaf must be adjusted so that under normal operang condions, the controller will sense
when the gate has come into contact with an obstrucon and will reverse as per UL 325 regulaons.
If the IES is acvated while the gate is opening or closing, the gate will immediately go into a “so
shutdown” mode.