Enabling the Built-In 120 Ω Terminator
To enable NPort Express’s built-in 120 Ω termination resistor, you must short the bottom two pins of jumper 6 (JP6), on DE-211’s circuit board. To do this:
1.Use a screwdriver to remove DE-211’s outer protective case, and then locate JP6, as shown in the figures below.
2.By default, the top two pins of JP6 are shorted, which means that the built-in 120 Ω termination resistor is disabled (completely removing the jumper from the pins also disables the resistor).
3.Use the jumper to short the bottom two pins of JP6 to enable the built-in 120 Ω termination resistor.
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