User manual VAISALA WHP425 QUICK REFERENCE GUIDE

[. . . ] DESCRIPTION Mains Power Supply WHP425 provides heating and operating power for a WS425 Ultrasonic Wind Sensor or other equipment managing with 36VDC 0. 8A and 12VDC 0. 03A supplies. The WHP425 adapts automatically to all common mains power inputs (100/115/120/230) with no need for adjustment or setting of selector switches. [. . . ] Attach the mounting kit base part with the four screws to the metallic rear wall plate of the unit. Place the unit to the mast at suitable height, and fasten it there by means of the mounting kit cover part attached to the base part with the other four screws in the kit. Remove the unit front cover by first removing its four plastic fastening screws. The outlet for the mains cable shall be near the unit and easily accessible. In case the original mains cable is too short for the application, replace it with another, carefully observing the L/ N/ PE markings on the screw terminals and in the diagram of Figure 4. Enter the sensor cable through the middlemost cable gland and make the cable wiring as instructed in Figure 4. and make the cable wiring as instructed in Figure 4, depending on the data transmit mode of the WS425. Carefully reattach the enclosure cover with the four plastic screws. ­ Especially for WS425 Ultrasonic Wind Sensors ­ Both heating and operating power available (36VDC 0. 8A, 12VDC 0. 03A) ­ Universal power input 100. . . 230VAC ­ Spare screw terminals and cable gland for data line connections ­ Fire resistant, non-metallic enclosure (UL 94-5V) ­ Ingress protection IP66/67 (NEMA 4X) ­ Mounting kits available for 60 mm, 75 mm, and 100 mm masts © Vaisala 2009. M211016EN-B Figure 1 Wiring principles For long sensor cables, with power line total resistance > 20, it is advisable to connect a 100. . . 220uF capacitor across +12VDC and respective GND at the sensor end. An 18V transient zener diode should be connected across the capacitor for protection. With long sensor cables it should also be noted that part of the heating power is stolen by the cable. [. . . ] Please see the applicable supply contract or Conditions of Sale for details of the warranty for each product. NOTE This manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of Sale. Visit our Internet pages at www. vaisala. com [. . . ]