I-7532M-FD ( 2-port CAN/CAN FD Bridge ) User Manual (version 1.0.0)
Page: 11
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2.4. Terminal Resistor Setup
In order to minimize the reflection effects on the CAN bus line, the CAN bus line has
to be terminated at both ends by two terminal resistors as in the following figure.
According to the ISO 11898-2 spec, each terminal resistor
is 120Ω (or between
108Ω~132Ω). The bus topology and the positions of these terminal resistors are shown
as following figure.
Figure 2-4-1 CAN bus network topology
Each I-7532M-FD includes two build-
in 120Ω terminal resistor, users can decider to
enabl it or not. The DIP switch for terminal resistor is on the upper of the CAN
connector.
Figure 2-4-2 Location of Terminal resistor DIP Switch
The following DIP switch statuses present the condition if the terminal resistor is
active (default) or inactive.
Figure 2-4-3 Adjustment of Terminal Resistance
