Allen Bradley 1756-WS ControlLogix Weigh Scale Module

The 1756-WS weigh scale module is made by Hardy Solutions and designed to be installed in the Allen Bradley ControlLogix PLC chassis. The 1756-WS scale module is a single weigh scale module and it reads the diagnostic data and weight from a set of strain gauge sensors or load cells and it transfers this data over the chassis backplane to the central ControlLogix processor. The 1756-WS module digitizes and conditions the weight signals and transmits the gross weight, net weight, or data about the rate of change to the processor. The 1756-WS module supplies 5 Volts DC voltage to a maximum of four 350 Ohm load cells or load sensors which are associated with a single weight scale.

The power requirements of the 1756-WS module are 5 Volts DC or 24 Volts DC. The current drawn from the backplane is less than 1 Amp at 5 Volts DC and less than 0.0125 Amps at 24 Volts DC. The signal input on the 1756-WS module can accept -0.3 millivolts to +15.3 millivolts and sense 5 Volts DC. The module output can deliver 5 to 8.75 Volts DC. The common mode rejection of the module is 100 dB at or below 60 Hertz. The internal resolution of the module is 1:8,388,608. The conversion rate supported by the 1756-WS module is 50 updates per second. The 1756-WS module weighs 1.1 pounds. The environmental specifications include a 0 to 60 degrees Celsius operating temperature range and a -40 to 85 degrees Celsius storage temperature range. The module supports electronic (C2) calibration and traditional calibration with test weights. Status LEDs for module status and scale functional data are provided on the front panel.

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