Vaisala WXT520 User's Guide download pdf (Page 47)

Chapter 5 _______________________________________________ Wiring and Power Management

VAISALA_______________________________________________________________________ 45

power with 12 VDC and 24 VDC supplies. Input resistance (R

) is

radically increased with voltages above 16 V (see the following graph).

The recommended ranges for AC or full-wave rectified AC are:

-68V

p-p

± 20 % (max 0.6 A), for AC;

-34V

± 20 % (max 0.6 A), for f/w rectified AC.

0805-22

Figure 21 Heating Current and Power vs Vh

WARNING

Make sure that you connect only de-energized wires.

CAUTION

To avoid exceeding the maximum ratings in any condition, the

voltages must be checked with no load at the power supply output.

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Vaisala WXT520 User's Guide Page 47