EHA completed field testing on a prototype mobile controls package for added Hi-Rail functions on a Caterpillar 320E excavator. The package consists of a Hydac 7" display with touch screen and GPS/GSM option, two Hydac 48X expansion I/O modules, an OEM Controls CAN joystick and an EHA built proportional dual air pressure regulator enclosure with Norgren, Hydac and Aventics components. One of the Hydac 48X I/O modules is incorporated into an enclosure with external relays, fuses and Deutsch plugs for customer connections.
The electrical assembly and harnesses are completely functionally tested at EHA prior to shipping to the customer.
The operator interface on the display consists of four easy to navigate screens that display air brake control pressures, system status with faults and GPS location and speed. Two of the screens provide the operator with onscreen buttons that operate machine functions that have historically been controlled with toggle switches. The ability to include these controls on the display and embed them into the controller logic, eliminated the need for mechanical interlocks on certain functions or required complex relay logic.
Provisions are being taken for the harnesses and display program for inputs from two Convoy Technologies video cameras eliminating the dedicated video monitor.