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

The CANobserver is a diagnostic tool for physical and logical long-term monitoring of CAN-bus systems and is designed as a locally installed supplement to the CAN-Bus-Tester 2.

Features and benefits

  • 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

How it works

The CANobserver 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.

Technical specifications

Protocols 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
Temperature range +5 °C … +40 °C

Contents of delivery

  • CANobserver basic unit
  • Bolted connector for the power supply and for the error output
  • Quickstart guide

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