CAN-Bus Tester 2


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The CAN-Bus Tester 2 is a widely used measuring device for control of bus parameters. The success story starts already in the year 2002 with the first model. The hardware was completely redesigned in version 2. The corresponding software is still developed and has been enhanced with extensive updates.

Check the setup of the bus before you switch on with the bus wiring test, measure under running conditions down on the physical layer and analyses data of the nodes with the protocol monitor. The longtime monitor shows scattered errors and creeping signal loss.

The trigger output makes it possible to show data from only one node of the bus.

The great box contents within the service case with big adapter set make it possible to use the device out of the box in many environments. You can save your measurements and print a status protocol directly from the software.


Bus systems CAN (ISO11898‑2), CANopen (CiA301), DeviceNet (EN 50325 – 2), SAE J1939
Bit sampling 64-fold, 10,240 sampling points
Bit timing Adjustable BTL cycles (tq), sample point and resynchronization jump width (SJW)
Supported baud rates Depending on bus system: 10; 20; 50; 100; 125; 250; 500; 800; 1000 kbit/s
Additionally user-defined: 5; 33.3; 62.5; 75; 83.3; 200 kbit/s
Automatic detection via baud rate scan
List of stations  Automatic detection via Station scan
Designation, CAN ID, ID type, Node ID, MAC ID, Source address,
can also be entered manually
List of Measurements  Possibility to measure at different measuring points and at different times
Sorting by measurement type, measuring point and measurement time
Quality level  Value representing the signal quality (0 …100%)
The minimum value and maximum values
saved timestamp
Disturbance-free voltage range
and edges
Disturbance-free voltage range (typ. ‑0.75 … 3 V, resolution 50 mV)
Edge steepness (falling and rising, specified in 1/64th of the bit width)
The minimum value and maximum values saved
Oscilloscope display  Trigger on message frames with the specified ID, trigger position can be set
Frame analysis and full frame recording
Decoding according to the protocol (CAN, CANopen, DeviceNet, SAE J1939)
Zoom (six stages)
Online Trigger Real-time monitoring of the bus for logical and physical errors
Resolution can be set (10 ms … 1 min)
Oscilloscope display and e‑mail notification on triggers
Automatic evaluation Limit value settings and measured-value evaluation according to:

• critical quality level
• critical disturbance-free voltage range
• critical edge (rising and falling)

Bus status Bus traffic detection (display: dominant, recessive, not defined, bus traffic)
Bus traffic load  Permanent display of the bus traffic load (0 … 100%),
Minimum and maximum values saved
Error frames Constant display of detected frame errors
Distinction between active and passive error frames (0 … >50,000)
Protocol monitor  CAN: Reception of CAN message frames incl. filtering, Transmission of CAN
message frames and sequences (message lists)
CANopen: Interpretation of all CAN messages according to the CANopen spec as SDOs, PDOs, NMT‑, Heartbeat‑, Emergency‑, Sync- and Timestamp
(CiA301, CiA302, CiA305, CiA401, CiA402, CiA404, CiA406, CiA408, CiA410, upgradeable)
Test record  Comprehensive, configurable measuring and test record on DIN A4:

• Letterhead with tester and customer contact data
• The tabular representation of the measured values
• Graphic representation of the measured values

Export function  Measuring data as a configurable CSV file
Graphical measured-data representation as a configurable bitmap (.bmp,.jpg,.png)
Firmware and FPGA configuration can be updated via USB
Electrical parameters
Power supply  Via the supplied wide-range power supply (9 … 36 V DC)
Current consumption 0.55 … 0.15 A
Measuring of the differential voltage typ. ‑0.75 V … 3.00 V
Measuring of the loop resistances typ. 0 Ω … 800 Ω
Measuring of the cable length typ. 0 m … 500 m

• 0…100 m: Resolution: 0.5 m, Accuracy: 3 % ± 1.5 m

• 100…500 m: Resolution: 1.0 m, Accuracy: 10 % ± 10 m

for a signal runtime of: 4.5 ns/m for CAN/CANopen/SAE J1939, 4.3 ns/m for DeviceNet

Measuring of the CAN supply voltage 0 … 36 V
Potential difference between the connections CAN bus, USB and oscilloscope < 50 V DC (or < 71 V AC)
Trigger output for the oscilloscope BNC socket, electrically isolated, H pulse, approx. 2 bits wide, level approx. 5 V
Mechanical parameters
Supply voltage connection  Extra-low voltage socket
CAN connection 2 x 9‑pin D‑Sub connector
PC connection Self-powered device to USB Specification 1.1, electrically isolated
Trigger output for oscilloscope
BNC socket, electrically isolated
Housing Aluminum sheet housing
Temperature range Operation: 5 °C … 40 °C
Storage: ‑20 °C … 60 °C
Humidity Operation: 20 % … 80 % (non-condensing)
Storage: 20 % … 80 % (non-condensing)
Degree of protection of the housing IP20 to EN 60529
Dimensions (Device /Case)  170 mm x 134 mm x 40 mm /504 mm x 354 mm x 119 mm
Weight (Device /Case) Approx. 600 g /Approx. 5000 g


The CBT2 is a Class A device. Such devices can cause interference in residential areas. In this case, the plant operator can be required to take appropriate measures and to bear the costs of such measures.

CAN-Bus Tester 2