Vaisala WXT510 - Manual (Page 37)

Chapter 5 _______________________________________________ Wiring and Power Management
VAISALA _______________________________________________________________________ 35
CHAPTER 5
WIRING AND POWER MANAGEMENT
This chapter provides you with instructions on how to connect the
power supply and the serial interfaces.
WXT510 can be accessed through four different serial interfaces: RS-
232, RS-485, RS-422 and SDI-12. Each of them can be wired either
through the internal screw terminal or the 8-pin M12 connector
(optional). Only one serial interface can be used at a time.
Power Supplies
Operating voltage Vin+: 5 ... 30 VDC
Notice that for the average current consumption, see the graphs in
Figure 14 on page 36 . The minimum consumption graph is for SDI-12
standby mode.
The input power supply shall be capable to deliver 60 mA (at 12 V) or
100 mA (at 6 V) instant current spikes with duration of 30 ms. These
are drawn by the wind sensor (whenever enabled) at 4 Hz rate, which is
the default value for wind sampling. Wind sampling at 2 Hz or 1 Hz rate
is also available (see
Chapter 8, Sensor and Data Message Settings, on
page 93 ). The average current consumption will decrease almost in
proportion to the sampling rate, since wind measurement is the most
consuming operation in the system.
CAUTION Cover the unused cable openings (in the transmitter bottom) with the
hexagonal rubber plugs included in the accessories.