GE Baker Hughes Masoneilan SVI FF, Installation And Operation Manual, Page: 68 / 264

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Incorrect polarity connection results in an effectively closed
connection.
Consult with qualified personnel to ensure that electrical
requirements for the switches are met.
The maximum voltage that can be applied to the digital switch outputs is 30 VDC. This is an
open circuit parameter (the digital switch is in the open state). Under open circuit conditions,
the switch current will be less than 0.200 mA.
The switch maximum current rating is 1 A. When the switch is ON, the typical switch voltage is

1V.
When the switch is on (closed) the external voltage must be dropped across the load
(Figure 35).
CAUTION
The load must be designed such that the current in the circuit is

1 A at all times. Some 3rd party devices, such as incandescent
lamps or solenoids, require surge and back EMF protection to
prevent voltage spikes.
Inductive Load, Solenoid, Incandescent Lamp Configuration
Figure 35 Switch Installation Drawing: Correct Configuration with Load
CAUTIONS
SVI FF Switch Output:

1 V
with switch ON
External
Voltage
Source
LOAD
Load is designed to limit current through the switch to < 1 A.
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If the load is inductive (solenoid,
incandescent lamp, etc.), then install a
Freewheel or Flyback diode to prevent
switch damaging EMF voltage spikes.
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