User`s guide

USER'S GUIDE____________________________________________________________________
58 __________________________________________________________________ M211095EN-C
Heated Transducers and Arms
In addition to heated transducers, the array arms can also be heated,
which prevents ice build-up on the arms.
The functional principle is the same as with the heated transducers only,
but the maximum heating power is limited to 200W and the average
heating power is limited to 150W.
WARNING
Some WMT700 product versions provide heating for transducers and/or
array arms. To avoid injury, do not touch the heated parts of the wind
sensor when the heating is enabled.
Powering
WMT700 has separate power supply inputs for operating and heating
power. The inputs are usually connected to the same 24 VDC power
supply unit, but special applications such as battery operation or battery
back-up may require separate supplies.
The operating power has one supply terminal and one ground terminal,
while the heating power has two supply terminals and two ground
terminals allowing higher supply current. All supply ground terminals are
internally connected to each other.
NOTE
In a system set-up with two separate power supplies, avoid ground
potential differences between the supplies. Connect the negative poles
together if necessary.
Operating Power
WMT700 can use any 9 ... 36 V (nominal voltage 24 V) min. 2 W DC
power supply that meets applicable safety regulations. Connect heating
supply wires to the ground in case heating is not used. The typical current
and power consumptions vs. operating voltage are illustrated in Figure 26
on page 59 and Figure 27 on page 59.
For low power operation using the SLEEP feature, see SLEEP — Enter
Low-Power Mode.