GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual page 67

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.
CAUTION
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).
Full voltage
drop is
occurring
across the
switch (no
current limit
in place)
Figure 34 Switch Installation Drawing without Load: Configuration Not Allowed
General Configuration Notes
This section discusses the necessary precautions when configuring a system.
V
SWITCH
I
SWITCH
© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
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.
+
SVI FF
Switch
Output
-
Switch OFF
30 VDC max.

0.200 mA (Switch leakage current)
NOT ALLOWED
 1
V (Switch saturation voltage)
1 A max.
+
External
Voltage
Source
-
Switch ON
Masoneilan SVI FF Instruction Manual
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