I. Product Introduction
HARDY HI 1756-2WS is an industrial-grade 2-wire weighing module launched by Hardy Process Solutions, a U.S.-based brand. Specifically designed for Rockwell ControlLogix systems, it serves as a core component in integrated weighing solutions. Adopting a 2-wire design, this module integrates weighing signal acquisition, conditioning and data transmission functions, which can directly connect to industrial weighing sensors, accurately convert object weight into standard electrical signals, and realize automatic weighing measurement and process control. It features high-precision weighing, strong anti-interference capability and easy installation, with built-in signal filtering and fault self-test mechanisms to ensure stable operation in complex industrial environments, effectively avoiding signal distortion and equipment failures. As a ControlLogix chassis-compatible module, it can be seamlessly integrated into Rockwell automation systems without additional adapters, widely used in food processing, chemical batching, building materials measurement, pharmaceutical production and other industries with high requirements for weighing accuracy and system integration, significantly improving the automation level and measurement accuracy of production processes.
II. Technical Parameters
1. Basic Information
– Brand: Hardy Process Solutions
– Model: HI 1756-2WS
– Product Type: Industrial-grade 2-Wire Weighing Module (ControlLogix Compatible)
– Origin: USA
– Certification: Compliant with IEC, UL, CE industrial standards, meeting FDA and ATEX explosion-proof specifications (for hazardous working conditions)
2. Power Supply & Output
– Operating Voltage: 24VDC (2-wire power supply, compatible with 20-28VDC wide voltage range)
– Output Signal: 4-20mA current signal (linearly corresponding to weighing range), supporting digital signal superimposed transmission
– Power Consumption: Typical power consumption ≤1.5W, low-energy design for industrial energy-saving requirements
3. Weighing Characteristics
– Weighing Accuracy: ±0.01% full scale, supporting high-precision measurement and batching control
– Sensor Compatibility: Compatible with 4/6-wire weighing sensors and Load Cells, supporting parallel connection of multiple sensors
– Weighing Range: Configurable, supporting different weighing ranges from 0-500kg to 0-100t (depending on sensor specifications)
– Signal Conditioning: Built-in high-precision ADC conversion, sampling rate ≥100Hz, supporting dynamic weighing compensation
4. Functional Features
– 2-Wire Design: Power supply and signal share 2 wires for transmission, simplifying wiring and reducing installation costs
– Fault Self-test: Equipped with sensor open/short circuit, signal drift and power supply abnormality diagnosis functions, real-time feedback of fault information
– Anti-interference Capability: Built-in electromagnetic shielding and filtering circuit, electromagnetic interference resistance up to EN 55011 standard, suitable for complex industrial scenarios
– Calibration Function: Supports on-site manual calibration and automatic calibration, calibration data stored stably without loss when power is off
5. Installation & Compatibility
– Mounting Method: Chassis mounting, compatible with Rockwell 1756 series ControlLogix chassis, no additional adapter required for installation
– Cable Configuration: Supports shielded cable connection, recommended cable cross-section 0.5-1.5mm², maximum transmission distance 1000m
– System Compatibility: Seamlessly compatible with Rockwell Studio 5000 configuration software, ControlLogix PLC and third-party DCS systems
6. Environmental Ratings
– Operating Temperature: -40℃ to +70℃, suitable for high and low temperature industrial working conditions
– Storage Temperature: -55℃ to +85℃, adapting to harsh storage and transportation environments
– Humidity: 5%–95% non-condensing, can operate stably in high-humidity and damp scenarios
– Vibration/Shock: Compliant with IEC 60068-2-6 (vibration) and IEC 60068-2-27 (shock) standards, vibration resistance grade 10g (10-2000Hz)
– Protection Level: IP20 (module body), sensor connection end supports IP67 protection adaptation
7. Typical Applications
– Food & Pharmaceutical: Raw material weighing, batching measurement, finished product packaging weighing (meeting hygiene standards)
– Chemical Industry: Corrosive material weighing, explosion-proof scenario batching control, warehousing measurement
– Building Materials Industry: Raw material measurement of sand, cement, etc., production line batching weighing
– General Industry: Warehousing and logistics weighing, automatic production line weighing linkage control, quantitative filling
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