<h2>Overview</h2>
<p>The <strong>Conveyor Components CMS-1G motion switch</strong> is a direct-drive, compact control unit designed to detect shaft rotation failure or loss of motion in industrial conveyor systems. With a cast aluminum housing and bi-directional sensing capability, the CMS-1G provides reliable protection for belt conveyors, bucket elevators, rotary feeders, and screw conveyors. It delivers an output signal at a predetermined speed, triggering machinery shutdown or alarm circuits when motion falls below or exceeds set thresholds.</p>
<h2>Key Features</h2>
<ul>
<li>Bi-directional motion detection — senses failure in clockwise or counterclockwise rotation</li>
<li>NEMA 3S, 4, and 4X enclosure ratings for weatherproof and corrosion-resistant operation</li>
<li>Cast aluminum housing with optional epoxy or polyester powder coating for enhanced corrosion protection</li>
<li>1 Double Pole Double Throw (DPDT) relay contact rated for 3A @ 120/240/480 VAC</li>
<li>Precision metal disc encoder with 12-segment brass disk for accurate speed sensing</li>
<li>Maximum operating speed: 1000 RPM</li>
<li>IP65 compliant sealing for dusty and wet environments</li>
<li>Flexible coupling interface for direct attachment to conveyor shafts, pulleys, or return idler rollers</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Power Input:</strong> 120 VAC (standard); optional 240 VAC or 24V AC/DC available</li>
<li><strong>Relay Type:</strong> Double Pole Double Throw (DPDT), dry, unpowered</li>
<li><strong>Contact Rating:</strong> 3A @ 120/240/480 VAC</li>
<li><strong>Encoder:</strong> 12-segment brass disk</li>
<li><strong>Maximum Speed:</strong> 1000 RPM</li>
<li><strong>Operating Temperature Class:</strong> T6 (85°C / 185°F)</li>
<li><strong>Ambient Temperature Range:</strong> -10°C to 55°C (14°F to 131°F)</li>
<li><strong>Enclosure Rating:</strong> NEMA 3S, 4, 4X; IP65 compliant</li>
<li><strong>Housing Material:</strong> Cast aluminum with optional protective coating</li>
<li><strong>Mounting:</strong> 4 × 5/16″ diameter holes; conduit connections: 2 × 3/4″ NPT</li>
<li><strong>Motion Detection:</strong> Bi-directional (clockwise and counterclockwise)</li>
</ul>
<h2>Typical Applications</h2>
<p>The CMS-1G is designed for industrial conveyor protection and process safety monitoring:</p>
<ul>
<li>Belt conveyor overspeed and underspeed detection</li>
<li>Bucket elevator motion failure protection</li>
<li>Rotary feeder and screw conveyor monitoring</li>
<li>Pulley and shaft rotation verification</li>
<li>Machinery shutdown and alarm signaling on loss of motion</li>
<li>Plant and mixing equipment protection in concrete and heavy trucking industries</li>
<li>Outdoor and wet-environment conveyor systems (NEMA 4X rating)</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Industrial conveyor belt systems and pulley drives</li>
<li>Direct-drive and flexible coupling mounted equipment</li>
<li>Machinery control panels with 120V AC auxiliary power</li>
<li>Overspeed and underspeed detection circuits</li>
<li>Plant automation and alarm signaling systems</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>Earlier or worn CMS-1G units</li>
<li>General-purpose (NEMA 4) motion switches in conveyor applications</li>
</ul>
<h3>Works With</h3>
<ul>
<li>120V AC machinery control circuits and PLCs via relay contacts</li>
<li>Industrial safety shutdown systems and interlocks</li>
<li>External alarm and notification devices</li>
<li>Tachometers and speed monitoring equipment</li>
</ul>
