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Diagnostic tool for the long-term monitoring of CAN bus systems

WEEE and RoHS conformThe CANobserver is a diagnostic tool for physical and logical long-term monitoring of CAN-bus systems and
可以的CANopen,SAE J1939,DEVICENET,分析,诊断,长期,记录,日志,物理,逻辑
 is designed as a locally installed supplement to the CAN-Bus-Tester 2. It is integrated permanently into the network, monitors the data transfer continuously and records it automatically.
Sporadic bus interferences, such as external EMC interference or a slowly deteriorating signal quality attributable to worn plug connections, can be detected in good time. To this end, the signal conditions of each CAN bus node are subjected to a physical and logical evaluation and any deviations from a predefined threshold value are recorded.
In this context, the physical layer diagnosis of the CANobserver offers decisive advantages: It reveals error sources in the physical set-up of CAN, CANopen, DeviceNet and SAE J1939 systems at an early stage. Thus, CANobserver is already able to inform the system operator before any communication error occurs.


  • Support of CAN, CANopen, DeviceNet and SAE J1939 systems
  • Physical monitoring: Monitoring of the signal-to-noise level, signal edges and display of the signal quality (0 ... 100%)
  • Logical monitoring: Monitoring of active/passive error frames, overload frames, acknowledge errors
  • Continuous display of bus load, bus status and optional CAN power lines
  • Display of errors via LEDs (permanent or current)
  • Free programmable error output lines
  • Automatic e-mail transmission at detection of a failure
  • Continuous display of bus load (0 ... 100%)
  • Easy operation by using a web interface
  • Control room connection via SNMP
  • Maintenance without PC
  • Export of measurement results in XML format for data processing with the
    CAN-Bus-Tester 2
Technical Data
Use CAN Bus (ISO 11898-2), CANopen, DeviceNet
(EN 50325-2), SAE J1939
Baudrate 5 kBit/s ... 1 MBit/s, according to the type of protocol (at CAN layer-2 additional user defined baudrates available)
CAN bus interface SUB-D plug, 9-pole
PC/Network connection 10/100 MBit Ethernet IEE 802.3u, RJ45
Power supply 9 - 36 V DC
Size and weight 125 x 50 x 124 mm (H/W/L), about 550 g
Case and protection level Aluminum case for DIN rail mounting with an IP 20 protection level
Temperatur range +5 °C ... +40 °C