Plr20 Pull-Wire Emergency Stop Switch

• Customization: Available
• Certification: ISO
• Number of Switch: 2
• Model NO.: PLR20
• Type: 2 Normally Open, 2 Normally Closed
• Application: Belt Conveyor
• Electric Current: High Current
• Ambient Ambient Temperature: -25~80ºC
• Ambient Atmospheric Relative Humidity: 90%
• Switch Contact Rating: 15A@115-230VAC
• Trigger Angle: 20°
• Enclosure Protection Grade: IP65
• Operating Force: 5-7kg
• Transport Package: Cardboard Box
• Specification: 190(L)mm× 171(W)mm× 203(H)mm
• Trademark: SAIMO
• Origin: China
• Production Capacity: 20000

Product Description

1.Product use environmental conditions
l Ambient ambient temperature: -25~80ºC;
l Ambient atmospheric relative humidity: 90%;
l Altitude of the use place: not more than 2000 meters;
2.Main Technical Parameters
l Switch contact rating: 15A@115-230VAC, 30VDC non-inductive
l output signal element: 2 single-pole double-throw micro switch
l Trigger angle: 20° away from the reset position
l enclosure protection grade: IP65
l external dimensions: 190 (L) mm × 171 (W) mm × 203 (H) mm
l Wiring holes: three 3/4-14NPT threaded holes
l Weight: 3.8kg;
l Operating force: 5~7kg.
3.Application range
l Conventional belt conveyor;
l Reciprocating conveyors
l bucket conveyors
l Skirt feeder/conveyor
l Packaging lines
l Stacking/reclaiming systems, cranes, excavators
l Ship loading/unloading systems
l Horizontal feeding systems
4.Usage
For emergency or normal shutdown of various conveyors.
5.Working Principle
The pull-wire switch is usually installed on one side of the conveyor, when the external force acts on any position of the pull-wire chained to the pull-wire rod, so that the pull-wire rod and the set reset position [vertical position or adjust the set reset position according to the n * 22.5 ° (1 ≤ n ≤ 7)] (see Fig. 2) deflected 20 °, the switch outputs a signal for alarm or shutdown, at the same time the switch is locked, and keep the locked state. When the switch is reset, the thumb reset knob must be pressed, the switch is unlocked and reset, and the wire pull lever returns to the set reset position.
The pull wire switch is normally mounted on one side of the conveyor longitudinal beam, with the switches spaced no more than 150 feet apart and the length of the pull wire not to exceed 75 feet. Eye bolts supporting the pull wires shall be provided every 8 feet. Two switch pull wires shall be spaced no more than 8 feet apart adjacent to the fixed end.