Vaisala DMT143 - Manual (Page 25)

Chapter 4 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 23
Power Supply Requirements
The minimum supply voltage required by the DMT143 transmitter
depends on the analog output type that is used:
- For voltage output: 12 ... 28 VDC.
-
For current output: 18 ... 28 VDC. The maximum load is 500 Ω.
The power supply should maintain the voltage for all load conditions.
If measuring in pressures above 20 bara (290 psia) or temperatures below
0 °C, the supply voltage must be 24 ... 28 VDC.
Current consumption during normal operation is <10 mA. The
consumption increases during the sensor self-diagnostics (auto-
calibration and sensor purge). The maximum current consumption is
220 mA pulsed current. See Figure 11 on page 24 and Figure 12 on page
25.
NOTE The DMT143 can be powered by the MI70 indicator or the USB service
cable. You can plug in the MI70 indicator or the USB service cable to the
digital port while the transmitter is powered from the analog port.