Vaisala WMT700 - Manual (Page 89)

Chapter 4 ________________________________________________________________ Installation
Heating Power
Table 27 below lists the minimum power supply requirements of
each WMT700 heating option.
NOTE In maritime environments, the normal input voltage ranges are: operating
voltage 10 … 30 VDC (-10% … +30%) and heating voltage
24 … 30 VDC (-10% … +30%), as defined in the maritime standard
IEC 60945.
Table 27 Heating Power Supply Requirements
Heating Option Heating Voltage Required Heating
Power Supply
None - -
Transducers 24 … 36 VDC 40 W
Transducers and arms 24 … 36 VDC 200 W
Transducers, arms and body 24 VDC 350 W (2 m cable)
Power and Cable Recommendations for Fully
Heated WMT700
Table 28 below shows cable and power recommendations. If a
longer than a 10 meter cable is needed, it is recommended to use
Junction Box with Cable (WMT70CABLE12) for extending the
cable length.
NOTE The minimum operation voltage for a fully heated WMT700
(transducers, arms, and body heated) is 16 V, if a separate power supply
unit is used for operation.
Table 28
Heating Power and Extension Cable
Wire Type/
Cable Length 2 m
WMT70CABLE1 *
10 m
WMT70CABLE2*
20 m 30 m 40 m
0.5 mm2/AWG20 24V 400 W 28 V 400 W - - -
1 mm2/AWG17 - - 28V 400 W 30 V 400 W 32 V 400 W **
1.5 mm2/AWG15 - - - - 30 V 400 W
* Vaisala standard connection cable.
** Not for maritime use.
VAISALA ________________________________________________________________________ 87