Do the NI-CAN Devices Support Split Termination? Hardware: Industrial Communications>>CAN>>PCI-CAN
Problem: A common setup with CAN buses is split termination. Do National Instruments CAN devices support this type of bus setup? Solution: National Instruments NI-CAN devices do support split termination and NI recommends to use a capacitor of 4.7 nF. As the name implies, this termination uses a single 120 Ohm resistor at each end of the bus. This method is acceptable in many CAN systems. Split termination is a concept that is growing in popularity because emission reduction can be achieved very easily. Split termination is a modified standard termination in which the single 120 Ohm resistor on each end of the bus is split into two 60 Ohm resistors, with a bypass capacitor tied between the resistors and to ground. The two resistors should match as close as possible. Note: EMC performance is not determined solely by the transceiver and termination method, but rather by careful consideration of all components and topology of the system.
Related Links: Attachments: 
Report Date: 03/17/2004 Last Updated: 03/21/2004 Document ID: 37GGN4W3 |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
