In this type of crane weighing system, the entire top block pulley arrangement is placed on 2 loadcells as shown in the scheme below. The advantage of the system is that the maximum number of ropes is weighed by the weighing system and therefore the accuracy of this system is the highest. However the capacity of the loadcell would be higher as it has to weigh the weight of the pulley and the entire assembly apart from the load.

The output from the loadcell corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. A separate parallel 50/100/200/300 mm display is also provided at the girder of the crane to enable viewing of the weight from the floor. The system has a potential free contact that would be activated if the crane is over loaded. It is possible to transmit the data from the weighing electronics to a base station receiver through Wi-Fi or ZigBee protocol.

There are options for the electronics to communicate with the crane PLC via analog output or any communication protocol such as MODBUS or Profibus.

The power supply for the system is taken from the single phase AC 230V available in the Crane Cabin. A switch mode power supply is provided internally so that it will take care of voltage variation as well as spikes.The output from the loadcell corresponding to the load applied is processed and displayed digitally in the indicator housed in crane control cabin. A separate parallel 50/100/200/300 mm display is also provided at the girder of the crane to enable viewing of the weight from the floor. The system has a potential free contact that would be activated if the crane is over loaded. It is possible to transmit the data from the weighing electronics to a base station receiver through Wi-Fi or ZigBee protocol.

There are options for the electronics to communicate with the crane PLC via analog output or any communication protocol such as MODBUS or Profibus.

The power supply for the system is taken from the single phase AC 230V available in the Crane Cabin. A switch mode power supply is provided internally so that it will take care of voltage variation as well as spikes.