Belt Sway Switch
FM2035
Application
The Belt Sway Switch functions in detecting any deviation
or sway in the conveyor belt and providing an auto-alarm
and sending out signal to stop the conveyor to avoid the
damage to the conveyor belt and prevent scatter of
conveyed materials because of the belt distortion. The Belt
Sway Switch is necessary in the safe conveying system,
widely used in the belt deviation detection of the belt
conveyor for coal, cement and building materials, mining,
electricity, port, metallurgy and chemical industries.
Operating principle ●The Belt Sway Switch functions in two levels: One for
auto-alarm, and the other for auto-stop.
●During the operation of the belt conveyor, when the belt
sways and touches the vertical roll, the roll turns on its axis;
When the belt sways abnormally, it will squeeze the
vertical roll and make it offset. When the vertical roll is at
20slant, the first level switch function may send the alarm
signal. When it continues to be at 35 slants, the second
level switches function works to send the stop signal.
●After the fault clearing, the belt departs from the vertical
roll and operate normally, the roll may reset automatically.
●The Belt Sway Switch of Fischer is constructed with
high reliability microswitches, lubricateless ball bearings, a
touch roller which is titled to 75 , and other parts; its
functions are designed with a large margin for sure action
and long life
Designation Misalignment Switch Type MF Type
Type of actuation Bidirectional
DIN EN 60204-1
Complies with DIN EN 60947-5-1
EN 620
Mechanics
Enclosure Aluminum ADC-12
Finish RAL5002
Actuating lever Stainless steel; ∅ 60mm, ball-bearded roller
Mounting 2 slotted holes for M8-screws Installation position
Deflection of roller lever Maximum +/-75°
Electric reliability micro switch > 500,000 actuations
Weight 2.2 kg
Electrical System
Switching system 2 changeover contacts (SPDT with snap action);
Switching range 20°…35°
Cable entry Threaded holes M20X1.5
AC-15: 230 V; 1.5 A
Utilization category DC-13: 60 V; 0.5 A
DC-13: 24 V; 2 A
Connection cross section 1 mm2 to 2,5 mm2
Protective conductor connection in the casing; M4; Class I: protective earthling
Rated insulation voltage Ui 250 V
Ambient conditions
Installation ambient temperature – 20C… +50°C
Employ ambient temperature – 20C… +50°C
Protection rating IP65 / IP67
Technology Date
Model Selection
Type Contact Ventilation Order number
configuration temperature range Membrane
SPDT – 40 °C …+70 °C
MF0235 2
MF0235 2
MF0235 2
Spare parts and accessories
Cable gland M25x1,5; sealing area ∅ 11mm to ∅ 16 mm
Name Height Belt Standard
Installation Bracket (Adjustment) H=200mm Belt Wide 650mm, 35°
Installation Bracket (Adjustment) H=260mm Belt Wide 650mm, 45° Belt Wide 800mm, 35°
Installation Bracket (Adjustment) H=325mm Belt Wide 800mm, 45° Belt Wide 1000mm, 35°
Installation Bracket (Adjustment) H=425mm Belt Wide 1000mm, 45° Belt Wide 1200mm, 35°
Installation Bracket (Adjustment) H=525mm Belt Wide 1200mm, 45° Belt Wide 1400mm, 35°
Installation Bracket (Adjustment) H=625mm Belt Wide 1400mm, 45° Belt Wide 1600mm, 35°
Installation Bracket (Adjustment) H=700mm Belt Wide 1600mm, 45°
Installation
●Prevention with slant on both sides of the switch should
be installed on the conveyor maintenance channel,
installation position should ensure that maintenance
personnel in the event of an emergency operation is
convenient
●Switch is located in the conveyor belt on both sides,
vertical roll with conveyor belt edge perpendicular to the
plane, and on both sides of the conveyor belt is located at
1/3 height of vertical roll.
●Switch and vertical roll conveyor belt normal position of
the appropriate spacing is 50 ~ 100 mm.
●Switch quantity should be according to the length of the
conveyor, types and arrangement for sure.
Should be in commonly conveyor head, tail, convex
segmental arc, concave segment and location in the middle
of the conveyor is set.
(Note: when the conveyor is longer, the position in the
middle of the conveyor can every 30~35 m set to 1)
●The partial switch should through the mounting bracket
and conveyor frame connection; switch bracket shall be
installed on the conveyor and conveyor frame welding,
after the completion of switch and switch bracket bolted
Appearance Dimension
Structure
Cable hole
Installation hole
Electric Diagrams
SB1 Stop Button KM EMI contactor E1 pull cord switch.1
SB2 Start Button QS. Air Switch E1 Pull cord switch 2
L1 pull cord switch E1 alarm display FU1 Fuse
L2 pull cord switchE2 alarm display FR thermal relay