If you use the standard power and signal cables ZZ45049 and ZZ45048, follow these instructions. For the power supply, connect the YEL, GRN, and PNK wires to the screw terminal #2 and the WHT, BRN, and GRY wires to the terminal #3. For the signal output, connect wires GRN, YEL, WHT, VIO, GRY, and PNK to terminals #7 ... #12. For signal grounding, connect BLK to the terminal #5. For the optional sensor power input, connect BRN to the terminal #6. Vaisala recommends using Vaisala WHP25 Mains Power Supply as a power source. It has a mast mountable, all-weather enclosure. WHP25 is sold only as a spare part. Figure 1. Wiring diagram for WAA252 and WAV252 installed on WAC151