A revolutionary approach to the vehicle harness - Introducing the next generation body function control
The SmartHarness™ caters for a wide spectrum of vehicle types, ranging from military, mining and public transport vehicles to industrial and earthmoving equipment. This simplistic harness is compact, easy to install and maintain, while harness design changes could be implemented with ease. Maintenance is simplified due to the system's built-in diagnostic capability and standardised components for all vehicle types.
- CAN (communications) network
- Centralized Control unit
- Distributed Nodes (at load points)
- Ease of installation/expansion/maintenance
- Significant reduction in electrical wiring
- Considerable reduction in installation time
- Increased reliability
- Field programmability
- Rapid re-configurability
- Output channels can be combined (paralleled) to achieve the increased current performance
- Accurate voltage and current measurements on each output channel
A simplified harness to address the need for complex vehicle body control functions
The SmartHarness™ intelligent harness system is a four-wire network that consists of a centralized Controller and a number of Nodes installed at strategic
locations in the vehicle, to provide the various body control functions. The network interconnects all Nodes via two communication wires (CANbus) and a power bus feed, resulting in much-simplified, light-weight and short localised wiring looms. The Controller and Node outputs are solid state switches and are connected to perform body control functions (i.e. brake light, indicator, wiper motor, headlight, etc.), keeping the wiring to each function to a minimum length. The control unit will be programmed to link the dash functions to the appropriate wired Node output(s).
The SmartHarness™ system is adaptable to suite various applications. It is expandable by simply adding additional functions to available Controller and Node inputs/outputs, or by adding an additional Node(s). A graphical user interface, in the form of a touch screen, LCD and a panel of tactile switches or discrete panel mount switches, can be incorporated to monitor and control the harness and body functions, providing for real-time status feedback to the driver.
- No body function fuse box required
- No timer relays or wiper control circuitry required
- Resettable electronic ‘fuses’
- Rapid short circuit and over temperature protection of the unit, loads and wiring.
- Current limits configurable per Node output
- Capable to perform in extreme vibration and mechanical shock environments
- Designed for chassis mount applications
- Ease of installation, maintenance and expansion
- Standardized harness components
- Customizable vehicle body control functions
- System real-time diagnostics
- Status feedback to vehicle driver
- Node ‘plug-and-play’ capable
- Lower installer/maintenance skills levels required
- Harness compatible to all vehicle types
- Ease of adapting to new/changed body control functions
- Lightweight four-wire system
- Improves road safety by real-time fault reporting
- Additional CAN port i.e. interfacing to J1939 standard
- Optional user interface
- Future enhancements – tyre pressure monitoring, GSM remote monitoring options, etc.
- PC-based configuration software
This unit is the master, containing the primary intelligence of harness system and interconnects the loom/dash controls with the various body control functions directly and via the Node units.
Its compactness makes it easy to install in the vehicle cab, close to the dashboard inputs/outputs and the chassis fuse-box loom. The Nodes interface to the Controller via the CANbus connection, while the graphical user interface could be co-located for driver access and status reporting.
The Controller is generic and utilises a powerful ARM Micro Controller Unit (MCU), providing the necessary resources to accommodate a vast number of body function configurations. The Controller is pre-configured for standard body control functions, and can be customised (via a user interface) to accommodate non-standard functions. Reserve processing capacity is allows the user to implement any harness changes/upgrades/expansions that might be required over the lifespan of the vehicle.
Controller Technical Specifications
||Die cast aluminium
||197 x 157 x 49
||Bare aluminium or Guncote™: matte black, Desert Sand, etc.
||Compliant with IP67
||Four 6.5mm mounting holes
||3 Axis, ±2g, 4g, 8g
|Internal Temperature Sensing
||-40°C ~ 125°C, ±2°C
|Digital Inputs (including 4 counter inputs)
|Highside Output Drivers (15A)
|Highside Output Drivers (5A)
|High/Lowside Output Drivers (10A)
||8 (configurable as up to four full-bridge motor drivers)
|CAN Bus Interfaces
||2 x CAN J1939 protocol
|Operating voltage range
||10VDC to 32VDC
||46 Pin automotive
|21 Pin automotive|
||90mA @ VBATT = 12V
|50mA @ VBATT = 24V|
||1.0W @ VBATT = 12V
|1.2W @ VBATT = 24V|
|Reverse polarity protection
|Load dump capability
||Compliant with Mil-STD-1275 Version D
||-40°C to +105°C
||-30°C to +85°C
The SmartHarness™ Node is an IO device managed by a centralized control unit. The system interconnects via the Controller Area Network (CAN). Node units are deployed as standardized interfaces to control various body functions on a vehicle. IOs can be configured to control indicators, wipers, headlights, etc. Nodes are interchangeable, keeping the harness standardized thus improving implementation and maintainability.
The Node has sixteen highside output drivers available. Current consumption per Node output is monitored continuously for diagnostic purposes. Diagnostic feedback such as open-circuit and short-circuit conditions will be reported. Outputs function as a switch with configurable current trip settings (fuse value) as well as trip delay settings (i.e. short/fast blow etc.). In the event of a trip occurrence, the output will be restored, avoiding false 'blown-fuse' situations as with traditional fuses. A Node output will thus act as a 'reset-able fuse'. A single output can serve two or more loads simultaneously. High current loads (blower units etc.) can be controlled using two or more outputs of a single Node.
The Node also has six general-purpose inputs available. These inputs can be software configured to accept analog or digital signals. Any vehicle body condition that needs to be monitored (i.e. Ignition switch, D+, wiper park feedback, etc.) could be wired to any Node input.
Node Technical Specifications
|Enclosure||Die cast aluminium|
|Dimensions (mm)||155 x 115 x 46|
|Finish||Bare aluminium or Guncote™: matte black, Desert Sand, etc.|
|Ingress protection||Compliant with IP67|
|Mounting||Four 6.5mm mounting holes|
|Internal Temperature Sensing||-40°C ~ 125°C, ±2°C|
|Highside Output Drivers (20A)||2|
|Highside Output Drivers (12A)||4|
|Highside Output Drivers (8A)||3|
|Highside Output Drivers (5A)||7|
|CAN Bus Interfaces||1 CAN J1939 protocol|
|Operating voltage range||10VDC to 32VDC|
|Connectors||46 Pin automotive|
|Current Consumption||48mA @ VBATT = 12V|
|48mA @ VBATT = 24V|
|Power Consumption||0.6W @ VBATT = 12V|
|1.2W @ VBATT = 24V|
|Reverse polarity protection||100VDC|
|Load dump capability||Compliant with Mil-STD-1275 Version D|
|Storage temperature||-40°C to +105°C|
|Operating temperature||Operating temperature -30°C to +85°C|