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Technical Information
Figure 4 RJ 45 to XJ485USB adapter cable
4.2.1 Bus termination / polarization
When building up a Modbus communication with several boards it is beneficial to terminate the bus at the
last board in line with a resistor. This is done by placing a jumper on the board. The pin connectors are
located close to the RJ 45 terminals. In some cases (disturbances on the bus), it could be also helpful to
polarize the bus with two additional jumpers at one controller on the bus.
Figure 5 Jumpers
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