Vaisala DMT132 - Manual (Page 17)

Chapter 2 __________________________________________________________ Product Overview
VAISALA _______________________________________________________________________ 15
Loop-Powered Display (Optional)
The DMT132 can be connected to a loop-powered external LED display
(type Nokeval 301, Vaisala order code 226476). The display provides a
reading of the output quantity. The display is powered by the 4 ... 20 mA
current signal, so there is no need for an external power supply.
The display is delivered at its default settings. Configure the display
functions and scaling according to the documentation delivered with the
display.
1102-053
Figure 6 Nokeval 301 Loop-Powered Display
NOTE The loop resistance of the display must be included in the loop resistance
calculation for the complete current loop. See section Power Supply
Requirements on page 24. For the loop resistance of the display, refer to
the manufacturer’s documentation.