ODOS Bullet Series contains devices for Thermo, Voltage, Strain, and PT-100 measurement. Each device is an independent acquisition system and can be used as a stand-alone device, as well as, in combination with other devices in a CAN bus network.
ODOS Bullet is a 1-channel DAQ unit with integrated acquisition electronics including a CAN controller. The Voltage/Temp/STG are directly output as a CAN signal.
The sensors and their configuration are part of ODOS CloudSoft. By adding the Bullet plugin, you can add the sensors into your configuration easily.
The potential environment of a system that is realized with Bullet
modules is characterized by following features:
Noise signals can couple in different ways. Depending on that
way (guided wave propagation or non-guided wave propagation)
and the distance to the noise source the kinds of coupling are differentiated:
If two electronic circuits use the same conductor we speak of a
DC coupling. Noise sources are in that case: starting motors, frequency converters (switching devices in general) and different
potentials of cases or of the common power supply.
An inductance coupling is given between two current-carrying
conductors. The current in a conductor will cause a magnetic field
which induces a voltage in the second conductor (transformer
principle). Typical noise sources are transformer, power cables
and RF signal cables.
A capacitive coupling is given between two conductors which
have a different potential (principle of a capacitor). Noise sources
are in that case: parallel running conductors, static discharge and
A RF coupling is given when electromagnetic fields hit a conductor. This conductor works like an antenna for the electromagnetic
field and couples the noise into the system. Typical noise sources
are spark plugs and electric motors. Also a radio set might be a
All inactive metal plates must be grounded with low impedance.
By this step all elements of the system will have the same potential.
Please take care that the ground potential never carries a dangerous voltage. The grounding must be connected to the safety
In general the cable shield should be grounded on both ends.
The cable shield should only be grounded on one end if an attenuation is necessary in the low frequency range. The cable shield
can not be grounded on both ends for temperature sensors. The
grounding on one end of the cable is necessary if
there is no contact to the safety earth possible,
analogue signals with only a few mV or mA are transmitted
If noise is coupled to a cable shield it is grounded to safety earth
via the metal cover. The cable shields have to be connected to
the safety earth with low impedance
The ODOS Bullet modules are designed for automotive applications.
The supply voltage must be within the range from 8 V DC to 40 V.
When using several modules on the bus make sure to terminate
the CAN bus at the starting point and at the end with a resistor of
120 Ohm. This ensures to run the CAN bus without physical disturbances like reflections.
To terminate the bus simply connect a resistor of 120 Ohm between the CAN-H and CAN-L bus line. When using the M12 connectors this can easily be done by using Bullets M12-termination-connectors. Modules used as T-modules must not be terminated. Please
make sure not to multiple terminate the bus. When measuring the
resistance between CAN-H and CAN-L (in powered down network) you will get a total value of about 60 Ohm.