Safety and reliability in reverse

Paul Boughton

Ogden Safety Systems Ltd designs and manufactures radar-based collision avoidance systems for on and off-highway vehicles that range from refuse collection trucks to heavy-duty wheeled quarry and mining equipment.

Characterised by the elimination of unwanted alarms, these console-controlled programmable devices utilise Ogden’s continuous wave multi beam radar that allows on-site set-up that exactly suits the application – essentially maintaining a precise detection zone with three individual but connected areas that are monitored and, via a CANbus networked machine interface, trigger various warnings and alarms such as the switching the vehicles’ reversing camera for the first stage to applying the brakes for the third stage.

For its VMS system (Quarry Vehicle Auto Braking System), which is typically used on vehicles operating in the most harsh and challenging environments, Ogden Safety Systems has chosen Herga Technology’s 6240 electric footswitch to control a temporary automatic braking override function where for instance the vehicle needs to be parked close to an object that is normally within the braking zone.

The footswitch is mounted inside the vehicle cab and is actually used as a hand operated button by the driver to actuate a controlled period of auto braking relief. This allows the necessary movement without compromising safety.

The Herga 6240 is well suited to arduous environments and carries an EN 60529 IP67 rating with IP68 on request. The 24V DC footswitch is available in current ratings up to 3A and with SPST normally open or closed operation as well as SPCO. A wide choice of mounting options include various button and base colours, cable lengths from 2 m to 10 m and several cordsets with IP40, IP67 and IP68 ratings.

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