Masoneilan SVI FF Instruction Manual
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© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
Verify Wiring and Connections
Use the following procedure to ensure that the SVI FF is properly powered:
Use an FOUNDATION
Fieldbus approved device to ensure that the voltage is between
9 and 32 V. If voltage is less than 9 V, the voltage is out of range. If 9 V is not attainable,
see “Troubleshooting” on page 117.
Output Switches
The SVI FF supports a contact output, SW #1 (Discrete Output switch), that can be logically
linked to status bits.
The switch is polarity sensitive and must be connected only to a DC circuit. The switch (+)
terminal must be electrically positive with respect to the (–) terminal. If the (+) terminal is
electrically negative with respect to the (–) terminal, then the switch will conduct.
If the switch is connected directly across the power source the current will be limited only
by the capacity of the power source and the switch can be damaged.
Without a load, when the switch is on (closed) the external voltage would be dropped across
the switch.
This damages the switch
(Figure 34).
Figure 34 Switch Installation Drawing without Load: Configuration Not Allowed
General Configuration Notes
This section discusses the necessary precautions when configuring a system.
Improperly or inadequately grounded installations can cause
noise or instability in the control loop. The internal electronic
components are isolated from ground. Refer to FOUNDATION
Fieldbus website for documentation and further instruction.
Switch OFF
Switch ON
V
SWITCH
30 VDC max.
1
V (Switch saturation voltage)
I
SWITCH
0.200 mA (Switch leakage current)
1 A max.
CAUTION
SVI FF
Switch
Output
External
Voltage
Source
NOT ALLOWED
Full voltage
drop is
occurring
across the
switch (no
current limit
in place)
+
-
-
+
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