Description
The rotary limit switch is used
to control the movement of industrial
machinery. It operates as an
auxiliary controller of electrical
motors through a power interface,
such as a contactor or PLC.
Suitable for heavy duty, its
shaft is connected to the motor
and, after a set number of revolutions,
the cams operate the switches,
thus starting the predetermined
movement.
A worm gear and a helical toothed
gear combined with one or more
pairs of straight toothed gears
are used for the transmission
of the movement from the input
shaft to the output shaft. Revolution
ratios ranging from 1:1 to 1:150
result from the use of different
combinations of gear wheels
between the input shaft and
the output shaft, which is connected
to the cams operating the switches.
Overall dimensions are suitable
for assembly in small spaces.
Transmission and gear driving
shafts are made of stainless
steel to prevent oxidation and
wear. The gear wheels and the
driving bushes are made of self-lubricating
thermoplastic material, suitably
chosen to reduce the wear to
a minimum and to maintain the
accuracy of the couplings over
time. Sintered bronze bushes
are moulded into the base of
the limit switch to optimise
the shaft rotation and to prevent
rubbing with plastic material.
Each cam can be set with great
accuracy thanks to the cam adjusting
screws. The auxiliary switches
are of the positive opening
type, thus suitable for safety
functions.The limit switch is
available with direct control
switches for operating directly
on the motor.
Materials
and components are wear resistant
and protect the equipment against
water and dust. The limit switch
can be customised with labels
and colours according to the
customer’s requirements.
Specification •
The limit switch can
be customised •
Switches available: 1NC
and 1NC+1NO, with positive mechanical
contact opening, snap action •
Available with potentiometer/encoder
Technical
Detail •
Operational temperature
-25°C / +70°C •
Degree of protection
IP 65 •
Insulation category Class
II •
Rated operational current
3 A •
Rated operational voltage
250V •
Mechanical life 1x106
operations •
Enclosure CE Switches
(UL, cUL on request)
