CANwatch is an analyzer supporting easy error detection during installation and operation of CAN networks. CANwatch judges the analog signal on the bus and detects errors like e.g. invalid levels, overshoots, slow slopes and short circuits within the signal lines.
Besides the diagnosis of problems during installation CANwatch offers the possibility to detect signal deficiencies below the level causing failures. This allows preventive error detection and thus an increase regarding the availability of automated systems.
Errors on the physical level of the CAN bus cannot be detected by protocol analyzers and could until now only be analyzed by specialists with expensive and bulky hardware. Due to the easy diagnosis and display with LED’s CANwatch offers fast detection and correction of errors also to installers and plant operators.
The bus interface is realized with D-Sub 9 connectors complying to the CiA standard DS-102.
| Pin 1 | – | Reserved, do not connect |
|---|---|---|
| Pin 2 | CAN_L | CAN_L bus line (dominant low) |
| Pin 3 | Gnd | Ground |
| Pin 4 | – | Reserved, do not connect |
| Pin 5 | – | Reserved, do not connect |
| Pin 6 | (Gnd) | Optional ground |
| Pin 7 | CAN_H | CAN_H bus line (dominant high) |
| Pin 8 | – | Reserved by CiA (error signal), do not connect |
| Pin 9 | V+CAN | Supply voltage from CAN bus |
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| Storage temperature | - 20 | + 80 | °C |
| Operating temperature | 0 | + 60 | °C |
| Supply voltage | - 100 | + 35 | V |
| Voltage on bus connections | - 2 | + 7 | V |
| Admissible power consumption (at 60°C) | – | 2000 | mW |
| Any (also temporary) stress in excess of the limiting values may cause permanent damage on CANwatch and other connected devices. Exposure to limiting conditions for extended periods may affect the reliability and shorten the life cycle of the device. | |||
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply voltage | 10 | 24 | 30 | V |
| Current consumption | – | 40 | – | mA |
| Input voltage CAN_L | tbd | – | tbd | V |
| Input voltage CAN_H | tbd | – | tbd | V |
| Input voltage difference (CAN_H – CAN_L) | tbd | – | tbd | V |
| All values, unless otherwise specified, refer to a supply voltage of 24V and an environmental temperature of 20°C. | ||||