User`s guide

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 inpu
t 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