CAN bus interfaces

How do I read J1939 or FMS signals from a commercial vehicle?

A J1939 or FMS interface reads the standard commercial-vehicle signal set, such as road speed, engine RPM, tachograph and PTO states, from the vehicle bus so body builders and telematics can work from consistent data.

Commercial vehicles carry a standard set of data on the CAN bus. J1939 is the underlying standard, and FMS is a fleet management signal set published on top of it, giving consistent access to signals like road speed, engine RPM, tachograph and PTO status across different chassis makes. For body builders, converters and telematics installers, that consistency is the value.

Working from a standard signal set

Instead of reverse-engineering each manufacturer’s wiring, a J1939 or FMS interface reads the published signal set off the bus. Body equipment and telematics then work from consistent data, so the same install approach carries across makes rather than being reworked each time. The CAN KONTROL CV is the general commercial-vehicle interface for this signal set.

Tachograph and PTO

Two requirements come up repeatedly. Tachograph data is often needed for telematics and compliance, and the CAN KONTROL TACHO is aimed at that. Power take-off status matters for body equipment that must behave around PTO engagement, and the CAN KONTROL PTO targets that. What can be read and provided depends on the vehicle and the device you are feeding, so we confirm it rather than assume it.

All are built on the i2CAN platform, designed and manufactured in the UK by Intellitec, part of Scorpion Group. One configurable platform covers the range, at both 12V and 24V.

What to tell us

Tell us the make, model and year, the signals your body or telematics system needs, and the device you are feeding. We confirm what is available on the vehicle and configure the output it needs.

StandardsJ1939 and FMS commercial-vehicle signal sets
Typical signalsRoad speed, engine RPM, tachograph, PTO status
ForBody builders, converters and telematics installers
Voltage12V and 24V
Made inUK, designed and manufactured by Intellitec

Frequently asked questions

What is the difference between J1939 and FMS?
J1939 is the underlying commercial-vehicle CAN standard, and FMS is a standardised fleet management signal set that manufacturers publish on top of it. Both give you consistent access to signals like speed, RPM and tachograph across makes.
What signals can you read?
Typical requirements are road speed, engine RPM, tachograph data and PTO status. Tell us the signals your body or telematics system needs and we confirm what is available on the vehicle and configure the unit.
Why use a standard signal set for a body build?
Working from J1939 or FMS means the body equipment reads consistent data across different chassis makes, so the same install approach carries over rather than being reworked per manufacturer.
Is a CAN-based output guaranteed?
What we can read and provide depends on the vehicle and what your equipment expects. Tell us the vehicle and the target device and we confirm the signals and configure the output it needs.

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Tell us the vehicle and the signal.

Send us the vehicle and what you need to trigger, and an engineer will confirm the right i2CAN module and configuration.