Pull Cord Switch - Slack Rope Type

Pull Cord Switch / Emergency Stop Pull Cord Switch also known as Rope Operated Emergency switch is used as a safety switch to stop the conveyor belt in case of an emergency by pulling the rope. Pull cord switch is mounted on the walkway side of the conveyor belt, preferably at about every 30 meters. When the rope is pulled from any side, the switch gets operated. Unless and until the handle is reset manually to normal position, the switch remains in operated condition. NC contacts of all pull cord switches are wired in series and further connected to PLC. When any switch along the belt operates, the contact opens and conveyor is stopped.

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Safety Pull Cord Switch with Rope Break Detection

SMARTsaa, an associate company of Protocontrol Instruments I Pvt. Ltd. Pune offers new and advanced range Conveyor Safety Pull Cord Switches for use on Bulk Material Handling Conveyors, Cutting Machines, Printing Machines and Wood Working Machines for emergency stoppage. To be used with Pull Cod wire. The contacts of these switches are to be interlocked such that when switch is operated the machine should stop, protecting human, machines and other vital and machine elements.

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Belt Sway Switch

SMARTsaa, an associate company of Protocontrol Instruments I Pvt. Ltd. Pune offers new and advanced range Conveyor Safety Pull Cord Switches for use on Bulk Material Handling Conveyors, Cutting Machines, Printing Machines and Wood Working Machines for emergency stoppage. To be used with Pull Cod wire. The contacts of these switches are to be interlocked such that when switch is operated the machine should stop, protecting human, machines and other vital and machine elements.

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Pull Cord - Belt Sway - Zero Speed Switches in Flameproof Enclosure

SMARTsaa offers Zero Speed Switch to monitor speed of conveyers, crushers, rolling mills, agitators, mixers, stirrers, screw conveyers, bucket elevators and other industrial machinery. The device actuates relay contacts when equipment speed reduces below set value. By using this contact equipment overload, under speed, Zero Speed can be detected. Speed sensor is placed in close proximity of the rotating object. On this object, metallic plates are fixed. Sensor detects presence of metal objects which come within the range of their oscillating field giving rise to corresponding pulses. These pulses are fed to the control unit where they are compared with the standard pulses to sense the speed. Output is in the form of relay contact.

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Heavy Duty Limit Switch

SMARTsaa manufactures Heavy Duty Limit Switch for use on Heavy Machines, EOT Cranes, Transfer Cars, steel mills and mobile material handling equipment for sensing of end limit and position sensing.

Construction:

Heavy Duty Limit Switch is a rugged electromechanical device designed to detect physical contact, position, or travel limits of moving machinery under harsh operational conditions and to withstand high mechanical impact.

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Zero Speed Switches

SMARTsaa offers Zero Speed Switch to monitor speed of conveyers, crushers, rolling mills, agitators, mixers, stirrers, screw conveyers, bucket elevators and other industrial machinery. The device actuates relay contacts when equipment speed reduces below set value. By using this contact equipment overload, under speed, Zero Speed can be detected. Speed sensor is placed in close proximity of the rotating object. On this object, metallic plates are fixed. Sensor detects presence of metal objects which come within the range of their oscillating field giving rise to corresponding pulses. These pulses are fed to the control unit where they are compared with the standard pulses to sense the speed. Output is in the form of relay contact.

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Digital Speed Indicator with Retransmission O/P

SMARTsaa Zero Speed Switch with Digital Display and Retransmission O/P provides relay contact O/P with parallel 4-20 mA or MODBUS O/P to process the signal at remote location.

The digital display indicates equipment speed as well as set speed accurately. The device also actuates relay contacts at preset speed. Using these contacts, desired control action such as zero speed protection / under speed protection / over speed protection can be achieved. The retransmission O/P can be processed at remote place like PLC / DCS.

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Compact Zero Speed Switch in Sensor Housing

SMARTsaa offers compact Zero Speed Switch housed in sensor housing itself. No need of separate control unit. The sensor and control circuit is housed in sensor housing (IP 67). It is simple, cost effective and easily mountable at site.

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Damaged Belt Detector - Infrared and Rope Type

SMARTsaa has developed Damaged Belt Detector Infrared and Rope Type for early detection of Belt Damage. It prevents production loss and reduces conveyor downtime

Generally two types of damages are observed:

Damages Occurred Due To Usage: Damage of belt due to excessive usages, heavy loads, wearing and tearing of belt edges, poor vulcanizing of joints, peeling of steel cord, peeling of rubber portion of the belt etc.

Damage due to unhealthy working condition: Cutting of belt due to locking of sharp object at discharge chute. As the belt is moving, the sharp metal piece cuts the belt longitudinally.

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Conveyor Guard, Machine Guard Safety Switch

SMARTsaa, an associate company of Protocontrol Instruments I Pvt. Ltd. Pune offers Machine Guard Safety Switch for detection of missing guard section placed around conveyor /machine.

Now a day, machine guards are installed around conveyors / machines to give additional protection to operators. These guards are installed at tail end, drive end as well as along the length of conveyor. These guards are to be removed in case of conveyor / machine maintenance. These guards are to be placed at its place before starting of conveyor /machine.

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Missing Bucket Detector for Bucket Elevator

SMARTsaa Instruments I Pvt Ltd has developed Missing Bucket Detector for Bucket Elevator. These sensors find application on bucket elevator to detect missing buckets. As the bucket elevator speed is constant the time gap between two passing bucket is also constant.

Extended range proximity sensors are mounted on the side of the casing. The bucket when passes in front of the sensor a pulse is generated.

The sensor gives command to a pulse evaluation circuit. When the time between two passing buckets exceeds a control action is generated.

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Belt Misalignment Detector for Bucket Elevator

SMARTsaa has developed entirely new range of Belt Misalignment Sensor for Bucket Elevator. These sensors find application on bucket elevator to detect misalignment of buckets. Bucket elevators have sidewalls, which a misaligned belt can rub against. Heat generated by this rubbing action can quickly reach a dangerous level, especially near pulleys where the belt side forces are the greatest. The casing may get damaged due to rubbing of the misaligned belt to the side wall of bucket elevator.

Extended range proximity sensors are mounted on the side of the casing. Two sensors are fitted, one on each side on the casing of bucket elevator on a location where bucket sway is maximum.

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Touch Switch, Electromechanical Belt Sway Detector

SMARTsaa has developed Touch Switch for detection of Belt Misalignment.

The Touch Switch is an electromechanical limit switch. When a belt misaligns or a pulley moves over and presses the sensor face, the built in solid-state switch detects the displacement and actuates solid state switch. The signal is further processed in electronic control unit and relay is actuated and conveyor / machine can be stopped.

Ideally Touch Switch is to be used in pairs and to be mounted on both sides of conveyor belt. When belt dislocates, either of the switch gets activated. The controller is equipped with latching circuit; the output relay gets latched when any one of the switch is actuated.

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Trip Indicator

• Easy and instant location of operated safety switch
• Saves precious down time in locating the operated switch
• Multiple operated switch displayed by way of scrolling
• Specially developed for conveyor safety and maintenance monitoring in material handling industries.
• Concept of TRIP INDICATOR with PC interface facility is developed first time in India (even in world).
• Can be easily adapted in running plants as no special cable is required

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Belt Watch System

Protocontrol brand which is established in Indian industries as a leading supplier of safety switches and control instruments from last two decades is now under flagship of SMARTsaa. SMARTsaa offers products of Protocontrol, improved with new generation technology, advanced features, improved quality supported with efficient presale and after sale support.

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Addressable Belt Watch Indication System

In large material plants raw material like Coal and Iron Ore is carried on multiple conveyors. Conveyors safety switches like Pull Cord Switch and Belt Sway switches are installed on this conveyor. NC Contact of all safety switch is taken in series. If any of the installed safety switches is actuated, the loop breaks and conveyor trips. However, the operator as well as DCS person do not get exact location of operated safety switch. Operator has to rush at field to locate the operated switch, resulting in production loss and extra down time.

SMARTsaa offers solution to this problem by Most Advanced Addressable Belt Watch Indication System. Now the entire plat safety switches are monitored at one place by using SMARTsaa Belt Watch System.

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