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SENSO
RS AN
D INS
TRUME
N
TATIO
N F
OR MAC
HINE
CON
DITION M
ON
IT
ORIN
G
Operating Principles
The Smart Switch operates over just two wires. It installs in series with any load (ie. annunciator, PLC or relay
coil)
. To energize itself, the vibration switch scavenges power from the load’s power source. When the alarm
threshold is exceeded, the switch is activated and the load’s power circuit is completed to facilitate the desired
alarm or shutdown.
Figure 1
– Block Diagram
Benefits of Solid State Relays
A solid state relay is an electronic component that functions in the same way as an electromechanical relay, but
without any moving parts. A solid state relay offers the most reliable switch action, especially for vibration
applications where moving relay components run a greater risk of malfunction. They are purely electronic devices
composed of a low current control side and a high current load side for switching action.
