Dial Switch on IG502

Dial Switch on IG502

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The pull-down resistance is OFF by default, and the dial switch is close to the non-antenna side.

The corresponding relationship of dial switch is as follows:
  1. Interface 1A pull-up resistance
  2. Interface 1B pull-down resistance
  3. Interface 2A pull-up resistance
  4. Interface 2B pull-down resistance

In the field application environment, if there are multiple nodes in the RS-485 bus network and the network is unstable, the pull-down resistance can be adapted accordingly.

The pull-up resistance and pull-down resistance are both 750 ohm.