The 1756-2WS weigh scale module has been designed for the Allen-Bradley ControlLogix systems. It has been designed and manufactured by Hardy Process Solutions. The typical applications for the 1756-2WS weigh scale module include batching, blending, filling, dispensing, level by weight, and weight checking applications. The 1756-2WS module is a dual scale module and it takes up one slot in the ControlLogix chassis. The module reduces installation costs and enhances speed because external Ethernet switches and routers are not required. The module collects data from load cells or sensors and transmits the collected data to the ControlLogix processor over the chassis backplane. The 1756-2WS module supports C2 Electronic Calibration which enables calibration without test weights. The Wavesaver module feature eliminates plant vibration effects around the scale. The 1756-2WS scale module supports hot-swapping, also known as insertion and removal under power.

Two or three LEDs on the front panel of the 1756-2WS scale module report its functional characteristics and provide status updates. The module weighs 0.5 kilograms. The working temperature range for the 1756-2WS scale module is from 32 to 140 degrees Fahrenheit and the transportation/storage temperature range is from -40 to 185 degrees Fahrenheit. The weighing modes supported by the 1756-2WS module include the net, gross, and rate-of-change modes. The module also supports traditional calibration which uses test weights. The 1756-2WS scale module draws less than 0.0125 Amps of current at 24 Volts DC and less than 1 Amp of current from the chassis backplane at 5 Volts DC. The module can sense 5 Volts DC and it can accept input signals ranging from -0.3 to 15.3 millivolts. The module output can deliver 5 Volts DC to 8.75 Volts DC of output voltage. The 1756-2WS module is approved by the UL, CE, RoHS, and REACH standards.