Answer / carl_ellis

The 3300 is a 2 wire, loop powered guided wave radar level instrument. So it needs 16-42Vdc for power; typically a 24Vdc power supply is used. Copper wire cable, shielded, twisted pair is used. If the radar is in a hazardous area, then either the installation is designed for explosion proofing or Intrinsic Safety (which uses a barrier or I/S isolator).

The SLC500 PLC needs a 4-20mA current analog input card. Usually the instrument power supply is separate from the rack power supply.

The wiring is shown in the manual, but it is traditional 2 wire loop powered wiring.

Carl Ellis
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