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If the bollard system is equipped with a device for automatic lowering, the bollards automatically lower in case of a
temporary power failure. The passage is always clear. The control unit checks whether the induction loops are active
when the power supply returns. The traffic light switches to red if the induction loops are not active. Then the
integrated flashing lights and the acoustic warning signal are activated. The bollards start rising after approx. 4
seconds. The passage is blocked. If the bollard system is not equipped with a device for automatic lowering, the
bollards remain in the up position. You must manually lower the bollards if passage is necessary
(see chpt. 8.1)
.
In order to keep the system in operation in case of temporary power failures, it can be equipped with an emergency
power generator (UPS device).
The control unit can be equipped with a weekly / yearly timer, e.g. in order to regulate loading / unloading times in
traffic-calmed areas. The control logic of timers acts in the exact same way as previously described. The acoustic
warning signals can be deactivated at night by using timers.
Heating elements can be used if bollards are used in areas where the temperatures fall below –10°C. The heating
elements prevent the formation of ice between the cylinder and frame and also ensure functionality at low
temperatures.
If bollard systems are used in areas with water-bearing layers, watertight foundation boxes with automatic immersion
pumps can be used. The immersion pumps pump the rainwater out of the watertight foundation boxes and ensure
system functionality.
DPT280
UK