Supplying Power To Pwd22/52; Internal Heaters And Heaters For Pwl111 Option; Figure 13 Pwl111 Jumper Settings - Vaisala PWD22/52 User Manual

Chapter 4 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 37

Supplying Power to PWD22/52

Power supply can be connected separately for the measurement
electronics and heating. This allows for the battery backup to be limited
to the measurement power supply.
Measurement electronics require 12 VDC ... 50 VDC. All the heaters can
take AC, DC, or rectified AC. The heater voltage dimensions are
specified below.

Internal Heaters and Heaters for PWL111 Option

The heaters for Background Luminance Sensor PWL111 (optional) are
parallel to the PWD22/52 internal heaters (connector X18 on the
PWC22/52 board). Both heaters are powered by the PWD operating
voltage line and the DC voltage level must be between 12 V and 28 V
(24 V recommended).
If the DC voltage is as low as 12 V, the jumpers inside the PWL111 must
be set to 12 V to guarantee sufficient heating power. To access the
jumpers open the two screws on the back cover of the PWL111. See
jumper settings in Figure 13 below.
Figure 13 PWL111 jumper settings.
Heating Voltage
12 V
24 V
1206-035
Jumper Locations
A, D
B, C