Board map

Green box

  • power bus power in
  • 12V by on board regulator, supply for chip, can also be used by other your purpose

Orange box

  • RS485 converter

Yellow box

  • direct TTL output or RS485 output selector

Red box

  • Data indicator
  • 3V3 power indicator

Purple box

  • NC, not in use

Blue box

  • All data output
  • BUS output to slave modules
  • TTL data output
  • RS485 data output

ref