B&B Electronics I-7565-H2 - Manual - Manual (Page 10)

2.4 Terminator Resistor Settings
According to the ISO 11898 specifications, the CAN Bus network
must be terminated by two terminal resistors (120 Ω ) for proper operation,
as shown in the below figure.
Figure 2-6: Terminal Resistor
Therefore, the I-7565-H1/H2 module supplies a jumper for users to
active the terminal resistor or not. If users want to use this terminal resistor,
please open the I-7565-H1/H2 cover and use the JP3 for I-7565-H1 / JP3,
JP4 for I-7565-H2 to activate the 120
Ω terminal resistor built in the module,
as the Figure 2-7. Note that the default setting is active.
Figure 2-7: Terminal Resistor Jumper
Enable (default), (Position: 1-2) Disable, (Position: 2-3)
Figure 2-8: JP3/JP4 Jumper Position
I-7565-H1/H2 High Speed USB/CAN Converter User’s Manual (Ver 1.1, Nov/2009) ------------- 10