Overview
The Conveyor Components CMS-1X motion switch is a compact, direct-drive control designed to detect loss of rotation in conveyor systems and rotating machinery. Unlike conventional speed sensors, this unit monitors for zero-speed failure—indicating when equipment has stopped unexpectedly. The CMS-1X provides critical protection against compound damage from inoperative or failed conveyors, making it an essential safety component in industrial automation environments.
Key Features
- Direct-drive design with precision metal disc motion detection
- Dual-circuit output capability—one circuit for machinery shutdown, one for alarm notification
- NEMA 7 and NEMA 9 explosion-proof rated enclosure
- Bi-directional detection—senses motion loss in either clockwise or counterclockwise rotation
- Cast aluminum housing with optional epoxy or polyester powder coatings for corrosion protection
- Mounts via four 5/16″ holes with flexible coupling to rotating equipment
Technical Specifications
- Output Relay: Dry, unpowered Double-Pole Double-Throw (DP/DT)
- Relay Rating: 3A @ 120 VAC, 240 VAC, and 480 VAC
- Standard Power Input: 120 VAC (transformer supplied)
- Optional Power Input: 240 VAC or 24 VAC/DC (available upon request)
- Enclosure Rating: NEMA 7 (Class I, II, III hazardous locations) and NEMA 9 (Class II, III)
- Mounting: Four 5/16″ diameter holes; requires flat, smooth mounting surface
- Conduit Openings: Two 3/4″ NPT for both standard and explosion-proof units
- Housing Material: Cast aluminum with optional epoxy or polyester coatings
- Rotation Detection: Bi-directional (both directions)
Typical Applications
- Belt conveyor systems—primary and secondary drives
- Bucket elevators and vertical conveying
- Rotary feeders and screw conveyors
- Return idler roller monitoring
- Emergency shutdown interlocks for hazardous-duty conveyor networks
- Industrial environments requiring NEMA 7/9 explosion-proof rated controls
Compatibility & Replacements
Compatible With
- Standard 120 VAC, 240 VAC, and 480 VAC control circuits
- Optional 24 VAC/DC supply (transformer-less)
- Industrial programmable logic controllers (PLCs) via relay contact outputs
- Conveyor safety systems and emergency stop networks
- Flexible coupling shafts and stub-shaft mounting configurations
Replaces / Drop-In Replacement For
- Conveyor Components CMS-1G (NEMA 4 general-purpose variant)
- Legacy zero-speed motion switches from Conveyor Components Company
Works With
- Standard industrial relay logic and hardwired control systems
- PLC digital inputs via relay contact closure
- Motor starters and magnetic contactor circuits
- Alarm annunciators and shutdown solenoids
- Dual-setpoint variant: CMS-DSPO (Dual Setpoint Pulse Output) for more complex speed monitoring
