Hardware
Last updated
Last updated
The contents below specify the conditions to be ensured for the operation of ReXgen Air.
When inserting the SIM card in a ReXgen Air device, open the lid on the SIM slot correctly and carefully. Mishandling the SIM slot lid can damage the device and the SIM card inside.
Also, ensure the SIM is inserted, as shown in the images above (Chip facing down).
Since it is not required to provide a common ground between nodes, it is possible to have ground offsets. Each node may observe different single-ended bus voltages (common mode bus voltages) while maintaining the same differential voltage. Operating a CAN system with large ground offsets can increase electromagnetic emissions. If the system is sensitive to emissions, steps must be taken to eliminate ground offsets.
ISO-11898 requires that the CAN bus have a nominal characteristic line impedance of 120Ω. Therefore, the typical terminating resistor value for each bus end is 120Ω. Bus termination is used to minimise signal reflection on the bus.
It is always recommended to keep the nominal voltage within the specified rate. The device also has internal protection against low energy voltage events due to supply wire noise.
CAN Bus and USB of the device are not isolated; care must be taken when plugging the USB into the device. Removing the device's power supply is advised when interfacing with a USB PC.
Do not use the logger's USB port for stand-alone data logging, as it may damage the USB port, which won't be covered under warranty.
Always mount the device in a way that minimises vibration exposure and accounts for the IP rating of damage. Air is supplied with four screws to assist you with mounting.
An external active FAKRA C or FAKRA D antenna with a supply voltage of 3V is required for GNSS and LTE data logging. It is to be ensured that the antenna is connected correctly (at all times) and that it is not loose when the ReXgen Air is powered on. Operation with a loose antenna or without the antenna entirely can lead to GNSS/LTE data loss.
CAN Bus Isolators and USB Isolators can be separately
