ST75/ST75V Mass Flow Meter
Fluid Components International LLC
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5
06EN003368 Rev. G
Pulse Output Activation
The ST75/ST75V provides a pulse output feature. Instruments ordered with volumetric or mass flow units are factory set with totalizer
and pulse output activated. The mode can be changed in the field. Source and sink output wiring is shown in Figures D and E below.
Though only one configuration is shown with the VAC and VDC power supplies, the source or sink can be used with either power input.
Sink Mode
: 40 VDC max., 150 mA max. Customer-supplied power source.
Source Mode:
15 VDC output, 50 mA max.
Figure D
VDC Power Connection
Figure E
VAC Power Connection
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 (Elect Sensor): 11.6 watts
Sensor only: 0.25 watts
Power dissipation values under maximum load conditions:
Instrument (Elect Sensor): 12 watts
Sensor only: 0.30 watts
DC Version
Power dissipation values under nominal conditions:
Instrument (Elect Sensor): 4.5 watts
Sensor only: 0.25 watts
Power dissipation values under maximum load conditions:
Instrument (Elect 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.
(TR5,
ON
TB2
+
18-36VDC POWER IN
SOURCE
SINK
4-20mA I OUT 1
COM
I OUT 2
4-20mA
RTN
SIGNAL OUT
FCI
-
EARTH
GND
TB1
1.6A,
SB, UL)
S/N
FC88/CLI
P3
F1
C01440-1-1
RS-232
Connection
Source
Output
Counter Input
DC POWER IN
4-20 mA OUTS
IN
COM
10 KΩ
C01441-1-1
(TR5, 250V
F1
1.6A, SB, UL)
TB1
4-20mA
SOURCE
OUT
ANALOG
TB2
4-20mA RTN
OUT
PULSE
ON
TB3
SINK
COM
NEUT
AC
85-265VAC
LINE
AC
POWER IN
GND
EARTH
P3
FC88/CLI
FCI
S/N
RS-232
Connection
Ext. 24-40 VDC
Power Supply
150 mA Max.
Counter Input
IN
COM
10 KΩ
–
+
AC POWER IN
4-20 mA OUTS
Sink
Output
