It is common practice to fit induction loops under the road surface to provide added protection to vehicles. As an example, if a vehicles with a trailer stops part way through the barrier, the photocells may see between the vehicle and trailer, and allow the barrier to operate. The addition of the induction loop acts as a second level of safety and prevents movement until the vehicle has cleared the barrier.
For plain booms, we can fit a protective rubber safety edge to the underside of the boom. This rubber edge is a category 3 self-monitoring system and will cause the boom to immediately stop movement and return to the raised position if it encounters an obstruction whilst closing. Our PLC system allows us to adjust the response time for this safety system to provide an instantaneous response to a safety issue.
For barriers with a plain boom, we fit a pair of photocells which protect the roadway directly under the boom. The photocells are fitted to the barrier cabinet and to the tip rest. Wired photocells are usually supplied but we can also supply wireless units if it is not possible to cable across the road. For barriers with a lower skirt, or hi-bar upper and lower skirt, two pairs of photocells are fitted. These are mounted on stand off brackets either side of the boom at different heights to provide maximum protection.
To enhance the standard safety system, we can add secondary safety items such as a flashing beacon with sounder capabilities, LED boom lights and STOP signs. If a desktop push button system is chosen, this will also have an integrated emergency stop function and a deadman keyswitch is also available.