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7 Doc. No. 06EN003367 Rev. E
ST50 Mass Flow Meter Fluid Components International LLC
VAC Power
As Shown:
85-265 VAC power connected with Gnd
4-20 mA connected for flow and temperature
Pulse Out in sink mode
Note: In sink mode, 40 VDC max, 150 mA max customer-
supplied power source.
Power Dissipation
AC Version
Power dissipation values under nominal conditions:
Instrument (electronics + sensor): 11.6 watts
Sensor only: 0.25 watts
Power dissipation values under maximum load conditions:
Instrument (electronics + sensor): 12 watts
Sensor only: 0.30 watts
DC Version
Power dissipation values under nominal conditions:
Instrument (electronics + sensor): 4.5 watts
Sensor only: 0.25 watts
Power dissipation values under maximum load conditions:
Instrument (electronics + sensor): 6 watts
Sensor only: 0.30 watts
VDC Power
As Shown:
18-36 VDC power connected with Gnd
4-20 mA connected for flow and temperature
Pulse Out in source mode
Note: In source mode, 15 VDC output max, 50 mA max.
Figure H
VAC Power Connection
Figure G
VDC Power Connection
RS 232 Connection
RS 232 Connection
Analog Output
4-20 mA: The instrument is provided with two 4-20 mA outputs. By default Output 1 is configured for flow and Output 2 is configured
for temperature. Terminal blocks accept14-28 AWG wire, 500 ohms max load per output.
VDC Input Power IO Board VAC Input Power IO board