Function 

The ROS-2D-FM is designed to signal that a conveyor belt is misaligned. It produces an alarm signal if the belt tips the roller arm 10 degrees from normal and a second signal, usually to shut down equipment before damage, at 20 degrees. 

Location 

The roller of the ROS-2D-FM is usually mounted on both sides 1 inch from the moving belt with the roller centered to the edge of the belt. Distance from the head and tail pulleys is recommended from at 1-6 feet. Short belts may only need (2) ROS-2D-FM and some longer belts add ROS-2D-FM at 600 foot intervals for additional protection. 

Specifications 

· Microswitch Rating: 15A @ 115~230VAC，30VDC non-inductive 

· Outputs: (2) SPDT (one alarm, one shutdown)

· Actuation Angle: 10 degrees and 20 degrees from normal 

· Enclosure: NEMA 4 · Conduit Holes: (2) ¾”-14 NPT 

· Temperature Rating: -45 to 176 F (-42 to 80 ℃), these ratings are based on physical tests, not on the actual switch rating, the positive closure of the alarm contact forces the alarm current signal to the alarm condition at the coldest of temperatures, alarm reset is hampered at temperatures below -40 

Installation Electrical 

· All wiring should conform to all NEC codes for the area 

· The top terminals are NO and the bottom terminals are NC (See microswitch drawing) Spares, Maintenance, and Troubleshooting Replacement parts include the roller and microswitches otherwise complete replacement