POWER INPUT OPTION
12VDC OR 24VDC
DFM-IV Flow Meters may be ordered factory-configured for 12VDC, or 24VDC power input.
QUICK BENCH TEST:
Connect Sensor as shown below, then Power. Test operation of the DFM-IV by holding the sensor in
one hand and rubbing your thumb or fingers briskly across the face (plastic surface) of the sensor.
Allow 15 seconds for the DFM-IV to process the signal and display a flow value.
CONNECTIONS:
POWER INPUT: Connect only 12VDC/0.54 Amps to the + and - terminals for units marked 12V, or
24VDC/0.27 Amps for units marked 24VDC. The Power Input GND terminal must be connected to the
nearest Ground pole. A 1 amp fuse in line is recommended. Power Consumption is 6.5 W continuous.
DFM-IV Doppler Flow Meter
Manual Series A.6
Page 30
GND
12 AWG
MAX
OPTIONAL 24VDC
OPTIONAL 12VDC
POWER INPUT
IMPORTANT:
MUST CONNECT TO A
GOOD GROUND (<1 Ohm)
WITH 12 AWG CONDUCTOR
24VDC
12V or
1 AMP FUSE
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