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Allen Bradley ControlLogix HM-1756-WM

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HM-1756-WM

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The HM-1756-WM model from Allen Bradley serves as a strain gauge input module within the ControlLogix series. This device is designed for Class 1 operation and accommodates two strain gauge input channels, offering precise analog measurements.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for HM-1756-WM

ManufacturerAllen Bradley
Product TypeStrain Gauge Input Module
Product LineControlLogix
Part NumberHM-1756-WM
Weight2.00 lbs (0.91 kg)
Module ClassClass 1
Number of Input/Output Words8 input words and 8 output words
Number of Input Channels2 strain gauge input channels
Input Impedance10,000 Ohms
Module Update Time1 milliseconds
Analog/Digital Conversion MethodSuccessive approximation (18-bit)
Display ResolutionUp to 0.0025% of full scale
Isolation Voltage500 Volts DC
Overall Module Accuracy0.01% of full scale
Backplane Power Consumption5 Volts DC at 40 milliamperes and 24 Volts DC at 84.99 milliamperes
Amplifier Bandwidth200 kilohertz
Excitation MethodInternal
Excitation Voltage10 Volts DC
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The Allen Bradley HM-1756-WM module functions as a dedicated strain gauge input module within the ControlLogix series framework. It offers two distinct strain gauge input channels, effectively utilizing an impressive input impedance of 10,000 Ohms for accurate signal processing. This module classifies as Class 1, indicating its suitability for various industrial applications requiring reliable measurements.

With an update time of only 1 millisecond, the device ensures rapid data processing. It employs an 18-bit successive approximation technique for analog-to-digital conversion, resulting in exceptional levels of accuracy—rated at 0.01% of the full scale. The display resolution is highly precise, achieving performance up to 0.0025%. An isolation voltage capacity of 500 Volts DC adds to its operational reliability, especially in electrically demanding environments.

The module operates with a backplane power consumption of 5 Volts DC at 40 milliamperes and 24 Volts DC at 84.99 milliamperes, ensuring effective power management. Featuring an internal excitation method, the HM-1756-WM provides a stable 10 Volts DC excitation voltage, supporting its measuring functions. The amplifier bandwidth reaches 200 kilohertz, allowing it to accommodate a range of signal frequencies within industrial measurements, making it a versatile and dependable choice for strain gauge applications.