Vaisala MMT330 - Manual (Page 55)

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 53
Galvanic Isolation for Power Supply
If galvanic isolation of the power supply line from the output signals is
needed, MMT330 can be ordered with optional galvanic isolation
module. This module prevents harmful grounding loops.
NOTE Galvanic isolation module is not needed when using the AC power
supply module. Note also that these two modules are physically
incompatible to be installed at the same time. If both modules are
installed, there is no room to close the transmitter cover completely.
0506-030
Figure 29 Galvanic Isolation Module
Number refers to Figure 29 above:
1 = Galvanic isolation module
Third Analog Output
0503-030
Figure 30 Third Analog Output
The following numbers refer to Figure 30 above:
1 = Flat cable pins
2 = Screw terminals for signal line
3 = DIP switches to select the output mode and range