ICP DAS USA I-2533CS-FD User Manual page 18

The following DIP switch statuses present the condition if the terminal resistor is
active (default) or inactive.
Generally, if your application is as follows, we recommend you to enable the
terminal resistor.
If your application is like the structure as follows, the terminal resistor is not needed.
I-2533CS-FD ( CAN/CAN FD to Single-mode Fiber Bridge ) User Manual (version 1.1.0)
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Figure 2-6-3 Adjustment of Terminal Resistance
Figure 2-6-4 Application 1
Figure 2-6-5 Application 2
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