Fluid Components International ST75_ST75V - Manual (Page 5)

ST75/ST75V MASS FLOW FLUID COMPONENTS INTERNATIONAL LLC
This page is subject to proprietary rights statement on last page 5 Doc. No. 06EN003368 Rev. C
Pulse Output Activation
The ST75/ST75V provides a pulse output feature. Instruments ordered with volumetric or mass flow units will be factory set with
totalizer and pulse output activated. The mode can be changed in the field. Wiring either sink or source mode is shown in Figures E
and F below. Though only one configuration is shown with the VAC and VDC power supplies, the source or sink can be utilized 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 E
VDC Power Connection
Figure F
VAC Power Connection
RS 232 Connection
VAC Power
As Shown:
85-265 VAC power connected with gnd
4-20mA connected for flow and temperature
Pulse Out in sink mode
Note: In sink mode, 40VDC max, 150mA max customer
supplied power source.
Power Disspation
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
RS 232 Connection
VDC Power
As Shown:
18-36VDC power connected with gnd
4-20mA connected for flow and temperature
Pulse Out in source mode
Note: In source mode, 15VDC Output max, 50mA max.