J1708 interface

The CANGO J1708 interface provides vehicle data in a reliable and standardized way. This enable all RS232/ASCII or FMS(J1939) enabled telematics platforms to implement their fleet management solution not just in trucks but also in VAN's, cars, etc, without platform changes.
J1708 interface read J-Bus and can provide the data in FMS standard and also in RS232/ASCII mode.

Readings
The data available via the J-Bus include the fuel consumed, the time of operation and the distance travelled, etc. This data can naturally be used to calculate the fuel consumed, instant and average fuel consumption, instant and average speed and the distance travelled.

Physical characteristics
Dimmensions (without cables)	Length 80mm, Width 40mm, Height 20mm
Weight	100grams
Material	PP
Cable length	1m
Environmental sealing	IP67
Storage temperature	-40 to 90oC
Operating temperature	-40 to 85oC
Relative humidity	max 90% at 40oC

Depending on the features of the auxiliary J1708 interface, this data can be processed in various other ways and communicated to an office-based follow-up, monitoring or maintenance system.
 
Operation

The vehicle computers (EDC, Retarder, Opticruise, EBS, ABS etc.) all communicate via an on-board J-Bus. For J1708 interface as standard, the vehicle's data bus can be provided with an interface that slots part of the information out through a firewall - one-way only - in a standardised encoded format (J1939) to a standardised interface. The firewall and interface are necessary to safeguard against hazards caused by interference with the vehicle's computer systems. CANGO J1708 interface assures the integrity of the vehicle database regardless of which FMS system is connected.

Electrical characteristics
Supply power	8~40VDC
Power cosumption	min. 20mA – max. 60mA
CAN High, CAN Low	Nominal input range: 0-5V Common mode input range: 7-12V Failsafe input range: 40V

From the interface, the vehicle data can be processed by third-party equipment. This gives the operator access to a number of different systems and features, making the equipment compatible with other systems on the fleet. Some of these systems already combine vehicle functions with GSM communication and GPS navigation and positioning.

Key Benefits

• Read-only the vehicle/equipment J-Bus data
• Translates J-Bus data to FMS standard

• J-Bus  characteristics
  Baudrate	9600kBit/sec
  Protocols	Selectable: J1587
  Hardware protocol	J1708

  Translates J-Bus protocol to RS232/ASCII
• Process the data via internal algorithms
• FMS standard support
• Extremely secure
• Robust design and IP67
• 1 J1708/J1587 port (protected read only)

• RS232 characteristics
  Baud rate	Selectable:  1200 to 115200 bps, default 56000 bps
  Protocols	ASCII based protocols
  Hardware control	NONE
  RS232 decoding	Datalength 8, Stopbit None, Parity None
  Checksum support	Selectable: Proprietary

  1 bidirectional CANbus port to provide FMS(J1939) data
• 1 RS232 port
• ISO11898 CANbus 10kbit-1Mbit
• Protocol Support for J-Bus (J1708/J1587) and proprietary protocols
• Full configurable, without programming
• 8-40 volt supply

 

Conformity
2004/104/EC and 2006/28/EC	The automotive directive for electronic equipment which can build in road vehicles
ISO 7637	Road Vehicles Electrical Disturbances
ISO 11898	CAN for high-speed communication
SAE J1939	Recommended practice for serial control and communications vehicle network
SAE J1708	Serial Data Communications Between Microcomputer Systems in Heavy-Duty Vehicle Applications
SAE J1587	Electronic Data Interchange Between Microcomputer Systems in Heavy-Duty Vehicle Applications
RoHS, WEE

For more information you can download:

Data sheet	J1708_interface_tech_spec_rev2.14092010.pdf
User Guide	CANGO_TI_User_Guide_rev10082010.pdf