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I-7530, I-7530-FT, I-7530A, I-7565
User’s Manual (Version 1.3, Apr/2015) -------- 15
2.5 Terminator resistor
According to the ISO 11898 specifications, the ISO 11898-2 CAN Bus
network must be terminated by two terminator resistors (120
Ω
) for proper
operation, as shown in the below figure. If there are not only two
terminator resistors or only have one terminator resistor on the CAN bus,
the CAN network may be malfunction. About the terminator resistor of the
I-7530-FT (follows the ISO 11898-3 specification), each I-7530-FT has its
own terminator resistor. Users don
’t need to take care about that.
Figure: Terminator resistor for the ISO 11898-2 CAN network
If users would like to enable or disable the terminator resistor inside
the CAN converters, it is necessary to open the cover of the CAN
converters and use jumper to do that. Here are the descriptions of how to
enable or disable the terminator resistor of the CAN converters.
Status
JP3 position
Enable (default)
(Activate)
Disable
(Deactivate)
Status
JP4 position
Enable (default)
(Activate)
Disable
(Deactivate)