The Autowatch Marker 90 system is an independent LED reverse parking aid that is specifically designed for use on 7 tonne rigid bodied lorries and HGV trailers to assist the driver when reversing. The system helps prevent accidental damage and injuries.
The Marker90 is unlike the conventional reversing systems or cameras that would have a buzzer or monitor fitted in the cab of the vehicle which is wired from front to back or in some cases wireless. This is a problem on HGV trailers as these systems are paired to a specific tractor unit or system and do not work unless coupled with a matching system.
The wireless systems are also prone to RF interference in many areas and high maintenance costs. The Marker90 system is completely independent of the cab as the entire system is installed at the back of the truck or trailer and is powered by the reverse light. This always ensures the benefits of the Marker90 when reversing. This is ideal for fleet operators that use a drop-off pick-up system or that use trailers or contractors as the system always works irrespectively.
How it Works
The Rigid or Trailer has four ultrasonic sensor eyes fitted into the rear bumper. The visual LED displays are built into both the rubber stalk mounted Marker Lights that are located on the rear side corners of the vehicle. The 2 Marker Lights are independent of the Autowatch Marker90 system and work as a normal Marker Lights with white LED lights facing forward and Red LED lights facing towards the the rear. We have 4 ultra bright amber LED's mounted within the white light of the Marker Lights facing forward.
When reverse is selected, the Marker90 system is powered by the reverse light power supply, which switches the Marker90 system on. As the vehicle reverses, any object that is detected 2.5m from the rear of the vehicle by the ultrasonic sensors in the rear bumper, will make the 4 ultra bright LED's in both the Marker Lights start to flash AMBER slowly. The driver can see both the Marker Lights in either wing mirror. As the vehicle gets closer to the object the flash rate increases to further warn the driver to slow down and take care. When the object is approximately 45cm from the rear of the vehicle the flash rate goes constant warning the driver to stop.
Two different models of the Autowatch Marker90 reverse warning system cater for the different bumper locations on the back of trucks and trailers. Both systems are suitable for 12 volt and 24 volt vehicles.
The first model (Marker90250) is for vehicles without a tail lift and the bumper that is mounted flush with the rear of the trailer. For this application the detection zone starts at 2.5m and the final constant zone is at 0.45m.
The second model (Marker90295) is used on vehicles with tail lifts and a bumper that is recessed under the back of the vehicle to give clearance to the lift. In this case the dead zone D is ignored but the detection from the back of the trailer is the same for both models as shown in the diagrams.
System Wiring and Configuration
24volt power supply cable has a IP68 rated fuse holder and Superseal connector.
The Marker90 module is fully potted and waterproof, and can be mounted externally.
Both marker light displays are fully potted and waterproof with IP68 connectors.
The marker light display cables are 3mtr with IP68 connectors.
Sensor eyes are rubber with a potted senosr amplifier and IP68 connectors.
The 4 sensor extension leads are 3mtr with IP68 connectors