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 gate, the photocells may see between the vehicle and trailer, and allow the gate to operate. The addition of the induction loop acts as a second level of safety and prevents movement until the vehicle has cleared the area. Both sliding and swing gates should have induction loops to both sides of the moving leaf, with double leaf swing gates having a diamond shaped loop in between the swing arc of the leaves.
Sliding gates are fitted with 6 safety edges to protect all potential trapping or shearing points. These category 3 self monitoring edges are fitted to the leading edge of the gate leaf, both sides of the drive stanchion on both the entry and exist sides (4 in total) and one to the rear of the gate leaf.
Swing gates are fitted with category 3 self-monitoring safety edges as follows. Each gate leaf has an edge to both sides of the lower horizontal rail of the frame, and one edge vertically to the leading edge of the leaf.
If any of these devices encounter an obstruction whilst the gate is in motion the gate will immediately stop and slowly move in the opposite direction to its original motion to clear the obstruction. The standard PLC system allows us to adjust the response time for this safety system to provide almost instantaneous response to a safety issue.
Sliding gates feature 2 pairs of photocells, one on either side of the gate leaf. Fitted at different heights to offer maximum protection, they are flush mounted in the gate drive stanchion and the closing post
Swing gates have two pairs of photocells at different heights on the outside of the gate posts. In addition, if required we can supply two free standing posts with a pair of photocells which are mounted clear of the swing arc of the gate.
Automated gates are all fitted with an emergency stop button to the stanchion of gate post, along with a flashing beacon/sounder. Swing gates feature non reducing gap type hinges so that there is no increased risk of trapping between the posts and leaves. To enhance the standard safety system, clients can add additional safety items such as LED lights and STOP signs to the gates leaves. If a desktop push button system is chosen, this will also have an integrated emergency stop function, and a deadman keyswitch is also available. Rubber finger guards can also be chosen between the gate posts and leaves.