Overview
The Conveyor Components CMS-1X motion switch is an industrial-grade zero-speed safety control designed to detect when rotating equipment ceases operation. Built for demanding conveyor applications, this compact control unit provides reliable protection against equipment damage from unexpected stoppages or belt slippage. The CMS-1X combines mechanical motion sensing with electronic relay logic in a single cast aluminum housing, making it a direct-drive solution for belt conveyors, bucket elevators, rotary feeders, and screw conveyors.
Key Features
- Direct-drive motion detection via precision metal disc on input shaft
- Dual-circuit output relay allows independent machinery shutdown and alarm control
- NEMA 7 and NEMA 9 explosion-proof rated housing
- Cast aluminum construction with optional epoxy or polyester powder coating for corrosion resistance
- Bi-directional operation—detects motion loss in either clockwise or counterclockwise rotation
- 120 VAC standard power input (240 VAC and 24V AC/DC options available)
- Mounted via four 5/16″ diameter holes with flexible coupling to rotating equipment
Technical Specifications
- Relay Type: Double Pole Double Throw (DPDT)
- Relay Rating: 3A @ 120 VAC, 240 VAC, and 480 VAC
- Power Input (Standard): 120 VAC
- Output Circuits: Two independent circuits (shutdown and alarm)
- Enclosure Rating: NEMA 7 (Class II Division 1) and NEMA 9 (Class III)
- Housing Material: Cast aluminum with optional protective coatings
- Input Speed: 1000 RPM nominal
- Horsepower Rating: 1/10 HP
- Conduit Openings: Two 3/4″ NPT openings (standard and explosion-proof models)
- Mounting: Direct to conveyor frame with four 5/16″ holes
Typical Applications
- Belt conveyor safety and monitoring systems
- Bucket elevator overspeed/underspeed detection
- Rotary feeder and screw conveyor protection
- Hazardous location conveyor installations (NEMA 7/9)
- Material handling equipment with critical uptime requirements
- Industrial plants requiring explosion-proof motion controls
Compatibility & Replacements
Compatible With
- All belt conveyor systems with stub shaft and flexible coupling attachment
- Conveyor pulleys and return idler rollers
- Industrial control panels with 120 VAC relay logic circuits
- Machinery protection systems requiring dual independent shutdown and alarm signals
Replaces / Drop-In Replacement For
- CMS-1G (NEMA 4 general purpose version) — CMS-1X is the explosion-proof equivalent at equivalent pricing
- Older zero-speed control designs with similar footprint and relay specifications
Works With
- Programmable Logic Controllers (PLCs) via relay contact inputs
- Traditional hardwired safety relay circuits
- SCADA systems accepting dual-relay input signals
- Conveyor management systems with motion monitoring capability
