Model RS Safety Pull Cord Switch

Model RS Safety Pull Cord Switch is a heavy-duty conveyor stop switch that provides positive shut off of dangerous equipment in an emergency. A cable pulled by endangered personnel actuates the control. The output contacts of the unit can control up to two separate circuits, one for machinery shutdown and one for an alarm. Safety minded operators of conveyors, production lines, elevator equipment, assembly lines, material handling systems, cranes, etc. consider it a must for employee protection.

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Description

A Model RS Safety Pull Cord Switch is usually installed with cable running in both directions from the crank type actuating arm. Each of the two sections of the cable runs to a fixed point through eyebolts spaced at regular intervals. A pull on the cable at any point along its run will rotate the red actuation arm approximately 60 degrees. The actuation arm will end in a position that is easily seen from a distance, thus identifying the actuated unit. Two spring loaded detents riding on a hardened steel cam provide resistance to arm rotation. When the actuation force overcomes this resistance the assembly rotates 60 degrees and is locked in place by the detents.

Affixed to the rotating shaft is a cam mechanism which actuates up to two micro switches during rotation. The micro switches are held in the actuated position by the detents. To reset the Model RS Safety Pull Cord Switch and deactuate the micro switches, the actuation arm is pushed in and rotated backwards.

Multiple model variations and accessories available to meet the specific needs of your operation. For assistance, call (800) 792-7427 or Request a Quote.

Specifications

Housing is cast aluminum with optional epoxy or polyester coatings available (for additional corrosion resistance)
Unit is actuated by a cable pulled from either direction; in other words, the unit is “double-ended” (however, Model RS will also work with cable on a single side when installed as a “single-ended” unit)
Unit is mounted with three (3) 3/8″ bolts on the conveyor by drilling (3) 13/32″ diameter holes
General purpose (weatherproof) units have (3) 3/4″ NPT conduit openings
Explosion proof units have (3) 3/4″ NPT conduit openings; conduit plugs included
Standard units have dry, unpowered SP/DT micro switches rated for 20A @ 120 VAC, 240VAC, and 480 VAC; 1/2 amp at 125 VDC and 1/4 amp at 250 VDC
DP/DT micro switch versions are rated for 15A @ 120 VAC, 240VAC; 3/4 HP at 125 VAC, 1-1/2 HP at 250 VAC
General purpose units are rated NEMA 4/4X weatherproof and corrosion-resistant
Explosion proof units are rated NEMA 7/9 for dust ignition proof and vapor explosion proof
Dual-rated “D” units are rated NEMA 4 weatherproof and NEMA 9 dust ignition proof
General purpose controls are IP65 compliant
Most models are UL listed and CSA certified

Model RS Safety Pull Cord Switch