Smartsaa Instruments (I) Private Limited

SMARTsaa manufactures and export Belt Watch System which is Unique and proven product for large material handling plants where multiple numbers of switches are connected in series.
Belt Watch System is developed to give exact indication of operated switch in control room

ADVANTAGES:

• Most advanced method of locating operated Switch with Instant indication, & tripping
• Time required to search for operated switch is eliminated.
• Communication through two core cable only, less cable cost and cable laying cost
• Interchangeable Communicating card
• RS 232 / RS-485 MODBUS O/P, PLC interface for fault logging.
• Miniature size of communication cards Fail safe circuit
• Specially suitable for high length conveyors
• Scrolling Display of multiple operated switch
• Roll call Feature: Indicates missing of communication card.
• General Field problems like: Cable open. Cable short are indicated on Trip Indicator
• Redundant O/P: Optional
• Trip Indicator: Effective working even if switches are filled with water

Belt Watch System operating principle:

A small communication card is to be wired inside the conventional safety switch. The trip indicator is to be installed in suitable location like control room. When any switch is operated, the location number of operated switch is displayed on the Trip Indicator. The trip indicator is also provided with relay output which can be interlocked with existing relay logic circuit.

Belt Watch System functional description:

Various models are available depending on number of safety switches/ length of belt, number of conveyors, configuration of communication o/p etc. However all models will have following basic features.

When any safety switch is operated, the O/P relay of trip indicator is operated, tripping conveyor instantly. Operated switch number is also displayed and communicated to PLC / DCS as per requirement. All safety features are incorporated along with special features as mentioned below.

To offer you suitable model, please inform us:

• Conveyor Number and number of switches on each conveyor
• No of loops connected to one Trip Indicator (We recommend grouping of one conveyor to one trip indicator)
• Total Length of conveyor
• Location of Trip Indicator
• Type of O/P required from Trip Indicator: 4-20 Ma, RS 485 MODBUS