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Item # BSD-0S, Model BSD Belt Speed Detector

The Model BSD is a "traction action" motion control that indicates when a conveyor belt has slowed or quit moving altogether. The unit can be adjusted as an overspeed, underspeed, or zero speed control. The output of the Model BSD can be wired into a PLC or DCS, or to the optional RMS controller (or MSD controller) which has a DP/DT relay to control up to two separate circuits, one for machinery shutdown and one for an alarm.

The Model BSD can shut down rotating equipment before damage is encountered. It provides protection for interlocked conveyor belts, especially if one of the belts fails due to overloading or quits due to tearing.

ADVANTAGE:  No drilling or tapping of tail pulley shaft required, unit is shielded between top and bottom of conveyor belt, and the unit can be placed anywhere on the conveyor belt.

Technical Specifications:
• The controller is sold separately, and is dependent on the sensor chosen.
• The RMS-12S (2 wire) sensor works with the RMS-G series controller, while the MSD-12S3 (3 wire) sensor works with the MSD-800 series controller.
• The RMS-G series controller is available in a NEMA Type 4 polycarbonate housing, while the MSD-800 controller is a panel mount plastic housing with display.
• Both controllers are available in either a 120 VAC, 240 VAC, or 24V AC/DC power input. Specify model number and input voltage upon ordering.
• The sensor can be used in outdoor environments and is connected to the controller(s) with (Belden 8442 or 8760 or similar).
• Each RMS-12S inductive sensor is supplied with 20 feet of electrical cable.  Field splice for longer lengths.
• The maximum separation distance between controller and sensor is 200 feet.
• Each controller has a dry, unpowered relay rated for 5A @ 120 VAC, and 240 VAC.
• 6 targets are built into the wheel assembly.  Wheel is replaceable if necessary.
• Safety cable is supplied standard, safety chain is optional (additional cost).
• The operating temperature range is -13ºF to 140ºF (-25ºC to 60ºC).
• No drilling or tapping of tail pulley shaft necessary.  Mounts between the conveyor belts.



Wheel (traction action) motion control, sensor not included. Does not include optional controller


Conveyor Components Company


Model BSD Belt Speed Detector Brochure
(PDF, 1968KB)