Vaisala DMT143 - Manual (Page 15)

Chapter 2 ___________________________________________________________ Product Overview
VAISALA ________________________________________________________________________ 13
Loop-Powered Display
DMT143 can be connected to a loop-powered external LED display. The
display provides a reading of the output parameter. The display is
powered by the 4 ... 20 mA current signal, so there is no need for an
external power supply.
Two models are available:
- Nokeval 301
- Nokeval 302 (with alarm relays)
The display is delivered at its default settings. Configure the display
functions and scaling according to the documentation delivered with the
display. For a wiring example, see Nokeval 301/302 Display Wiring
Diagram (document code M211634EN). For the order codes of the
displays, see section Spare Parts and Accessories on page 72.
1102-053
Figure 3 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. For the loop resistance of the
display, refer to the manufacturer’s documentation.