Reacts to rising vibes
May 1st 2008 When fixed to a piece of plant or
equipment, the VS0004 vibration
switch module from Monitran can
respond to a rise in vibration levels
in a number of user-definable ways.
It has two alarm levels, with the
user able to set Alarm 1 between 1
and 50mm/s and with Alarm 2
capable of being set as a multiple
of Alarm 1 – 1.5, 2, 3 or 5x. The
unit has a 4-20mA output scaled to
Alarm 2, so can be interfaced with
PLCs or other control circuitry.
The VS0004 contains a doublepole,
double-throw relay for each
alarm level, and the user effectively
wires to the normally open or
normally closed contacts,
depending on what action is to be
taken when an alarm limit is
reached. The switching capability
of each relay is 8A at 240V AC or
30V DC.
The switch module also has a
10sec Alarm On time constant and
a 30sec start-up delay, useful if the
unit is attached to machinery that
naturally shakes during power-up. More articles from Monitran Limited: | 
