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67385867493098462 | en, eu, V5, 07. Oct 2016, page 159

11.9.7 Security measures at gate automation

Controlling the gate by fully automated logic can be potentially dangerous, as the automation

system might go out of service or the control over it might be lost. In the worst case, the

automation system might damage a vehicle, which is in the gate area, or harm the health of people

inside. However, the risk may become just abstract, if you follow safety rules while designing,

installing and operating the gate automation systems.

Here are the steps taken by the controller manufacturer to ensure its safety:

1. The gate wings do not close under any circumstances, if any of vehicle presence

sensors is active.

2. If the STOP button on the security guard is pressed and held, the gate

wing travel is stopped for that period. It is recommended to use a push button (with

fixed switching position).

3. It is impossible to supply voltage to gate drive motors for both closing and opening

simultaneously.

To make these measures be effective, it is necessary to follow a number of safety rules while

installing and operating the controller:

1. You should mount the sensor in the gate area, so as to completely eliminate the

presence of the vehicle in the danger zone without activating this sensor. For a

photocell sensor, it is required to choose a valid height during its mounting. If

possible, we recommend installing two sensors on each gate post at different heights

or mounting multiple gate posts with sensors at different distances from the actuator.

Afterwards, their normally closed contacts are connected in series to produce a single

composite and more reliable sensor.

2. It is extremely recommended to install two additional sensors at both sides of the

gate, even if two readers are used and no additional sensor is required to determine

the vehicle passage direction. The requirements for installing additional sensors are as

follows:

● There must be no way of putting the vehicle, so that it was between the sensors,

and thus none of them was active. E.g., this could happen, if the sensor at either

entrance or exit is too far from the gate.

● The active zone of the sensors at entrance and exit must have no intersection with

the gate wing travel area.

CASTLE EP User Manual

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