Terminal Resistor Setup - ICP DAS USA I-7532RM-FD Service And Usage Information

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2.5. 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.

Each I-7532RM-FD includes two build-in 120Ω terminal resistor, users can decide to

enable it or not. The DIP switch for terminal resistor is on the upper of the CAN

connector.

The following DIP switch statuses present the condition if the terminal resistor is

active (default) or inactive.

I-7532RM-FD ( 2-port CAN/CAN FD Bridge )

Figure 2-5-1 CAN bus network topology

Figure 2-5-2 Location of Terminal resistor DIP Switch

Figure 2-5-3 Adjustment of Terminal Resistance

User Manual (version 1.0.0)

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