Wallace Perimeter Security SPEEDGATE, Installation And Maintenance Manual, Page: 26 / 142

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SAFETY DEVICES
Safety Devices
Open & Close Cycle
Before any gate movements commence the gate must have an audible warning time (a minimum of 2
seconds), during which the audible device (horn, siren or bell; a buzzer) is activated. The exception is,
of course, if the gate reverses there will be no clear time. The audible alarm is factory set to continue to
pulse during the movement of the gate. If required, the alarm can be programmed to only activate during
entrapment and fault events.
“Renewed command” means that a command (such as an open or close command) that was present at
the time of obstruction detection must be ignored. An example of this could be a Card Reader that has a
strike time of 8 seconds. If the gate begins to open and detects an obstruction, it is to reverse closed and
remain there. The input from the Card Reader (assuming it is still 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 position
of the gate for gate operation and reduced speed sensing when the gate has come into contact with an
obstruction. Additionally, the IES monitors torque via acceleration and deceleration.
Utilizing the parameters explained in “Gate Settings: Obstacle Detection” on page 114, the force exerted
by the gate leaf must be adjusted so that under normal operating conditions, the controller will sense
when the gate has come into contact with an obstruction and will reverse as per UL 325 regulations.
If the IES is activated while the gate is opening or closing, the gate will immediately go into a “soft
shutdown” mode.