Smartsaa Instruments (I) Private Limited

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.

Specification:

Sensor:

·       Supply: 10-30 V DC

·       O/P: PNP or NPN, NO + NC

·       Load current: 200 mA

·       Size:  Rectangular Block type with mounting bracket and gasket 

·       Object sensed:  Any Ferromagnetic minimum size 150 x 150 x 2 mm

·       Sensing Range: Up to 80 mm

·       Max operating frequency: 100 Hz

·       Operating Temp: 70 degree cent

·       Enclosure: ABS Plastic, IP 67

 

Control Unit:

·       Supply: 230 V AC

·       O/P:  2 C/O Relay Contact for field Mounting / 1 C/O relay contact for Panel Mounting

·       Contact rating : 5 Amp resistive at 230 V AC

·       Enclosure: Cat Al , IP 65 / IP 30 Panel Mounting 48 x 96 size

·       With pulse gap adjustment potentiometer

OPERATING LOGIC:

The Sensors senses the bucket and when bucket passes in front of sensor, a pulse is generated. This pulse is fed to control unit. The control unit measures time gap between the bucket and when the time gap exceeds set value, the relay actuates.

Relay -On Time: After actuation, the relay will remain OFF for time set.

Relay –On Time range: 0-999 m Sec adjustable.

The signal latching circuit is to be designed by customer at PLC or Panel end.

After this delay, if controller start receiving pulses at desired interval, the relay gets ON.

Design Criteria: As given by you

No Of Buckets Passing in front of sensor per second   : 3- 4

Normal Time Gap between two buckets                    : 332 m Sec - 250 m Sec

Settable time Gap range                                         : 0-999 m Sec

ITD: Initial Bypass Time Delay: Range 0-999 m Sec. This delay will come in picture when the controller is powered.

As initially when Bucket Elevator is given supply, it is at standstill. This ITD will allow the bucket elevator to achieve normal speed.

You need to design control circuit such that, when bucket elevator is Powered ON, Missing Bucket Detector gets power simultaneously.

Conveyor Guard Switch manufactured and exported by SMARTsaa are designed for use as guard sensor safety switch on conveyors and dangerous machines.
Conveyor guard safety rope switch to detect removal of conveyor safety guard fixed around long conveyor. This provides 360 degree protection, increasing human safety.

SAFETY PULL CORD SWITCH manufactured by SMARTsaa are designed for use on Conveyors , Machines y stoppage. To be used with steel 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.

Salient Features:

· The switch works actuates contact when rope is pulled

· The switch also actuates when rope is broken, slack

· The switch provided with reset button for local reset

· Optional LED indicator

· Robust design

· Compatible to EN418 norms

· Confirms to EN60947-5-5 , IEC60947-5-1

· Available in Single side operation or both side operations

The rope is to be hooked around the work area and at convenient height such that the operator will find is convenient to pull when in an emergency by using turn buckle, spring and thimbles.

The switch resets when rest push button on switch is pressed.

The switch designed for different rope length up to 120 meters is available.
Single side operation (left or right side) as well as both side operation options are available.

Special switches with rope break indication contact are also available.

 SPCIFICATIONS:

· Safety Pull Cord Switch

· Operation: Left, Right, both way operations

· Rope length: Both side operated switch: Up to 80 Meters each side

· Contact arrangement: 1 NO + 1 NC, 4 NC / 2 NO, 2 NC / 1 NO,

· Contact Rating: 10 Amp resistive at 230 V AC

· Enclosure: Field mounting IP 65 / IP 67, Plastic, Metal

· Cable Entry: ½ inch NPT / ¾ inch BSP

We also offer RequiredAccessories for Safety Pull Cord Switch:Like

Pull Cord Cable, Turn Buckle, Wire Rope Thimble (Rope Eye), Pulley, Stay Bolt, spring , Cable Rope Clamp, Bull Dog Clip

SMARTsaa offers Pull Cord Switch equivalent to:

Schmersal / Telemecanique /Allen Bradley /Schneider

We offer Best Price for Safety Pull Cord Switch with fast delivery 

SMARTsaaSafety Pull Cord SwitchPrice is affordable and economical.

SMARTsaa offers Pull Cord Rope / Wire / Cable for use with Pull Cord Switches for Emergency tripping of Conveyor.

This Pull Cord Rope is specially developed for Pull Cord Switches.

Pull Cord Rope: 6x7 GI wire construction, covered with PVC. Diameter approx. 5-6 mm specially extruded for material handling plant use. The PVC coating is of virgin PVC with protection against ultra-violate light.

We also manufacture Pull Cord Rope with SS strands for use in corrosive area and sea shore applications.

We also offer below accessories:

Tying clips: Two tying clips are required per switch for tying pull cord cable to switch

Hook: Pull cord cable passes through the hooks, which are placed approx. 3 Meters apart. 

Mounting Bracket: Mounting bracket made of sheet steel, powder coated with corrosion resistance paint for mounting pull cord switch. Suitable holes are made to mount pull cord switch at site.

Cable Gland: Nickel Cr plated brass cable gland, Size 3/ 4 inch ET 

These accessories are suitable to reduce installation time and cost of conveyor safety switches. They also better appearance and finish.

We offer Best Price for Pull Cord Rope with fast delivery