HI 1769-WS and 2WS

Hardy's HI 1769-WS and 2WS are single channel PLC-style weigh scale  module for use with the Allen-Bradley MicroLogix® 1500 and CompactLogix® controllers.

HI 1769-WS and 1769-2WS CompactLogix® Module

Small size, high performance!

Hardy HI 1769-WS and -2WS are single channel PLC-style weigh scale  modules for use with the Allen-Bradley MicroLogix® 1500 and CompactLogix® controllers. The HI 1769-WS and -2WS reads and conditions weight and diagnostic data from strain gauge load sensors or load cells up to one hundred times per second and communicates this data over the I/O chassis backplane to the PLC processor.

Super Easy Integration

  • Free Add-On-Profiles           
  • Free Faceplate/AOIs for HMIs
  • Direct Back-plane Connectivity

The HI 1769-WS module reduces installation costs, as it needs no external stand-alone scale instrument with a wired communications link to the PLC. High  resolution enables the module to tolerate large dead loads and over sizing of the load sensors, while retaining a high level of usable resolution. 

The WS module supplies 5 volts of DC excitation to drive up to four 350-ohm load sensors or load cells associated with a single scale. The 2WS supports up to eight 350-ohm load cells with two scales.  Both will support additional load cells with an external power supply.

The HI 1769-WS incorporates Hardy Process Toolbox core features of
WAVERSAVER®, C2® electronic calibration INTEGRATED TECHNICIAN® (IT).

Rockwell Add-On-Profile (AOP)

Quickly and easily configure the HI 1769-WS for your application through PLC software on a PC.  A face plate makes the modules incredibly easy to use with common weighing functions built into the faceplate. 

Download the HI 1769-WS AOP files

Visit our Case Studies or Application Notes on feeder control to learn more. Hardy’s process weighing solutions are easy-to-install, configure, commission and operate. They are easy-to-maintain and save you time, money, raw materials and/or finished product. 



• Provided from the backplane of the rack: +5Vdc
Backplane Current
• < 0.5 Amps @ 5Vdc
• Signal, -0.3mV through +15.3 mV
• Sense, +5Vdc
• C2® Electronic Calibration Diagnostics data
• Excitation 5Vdc
Common Mode Rejection
• 100dB at or below 60 Hz (minimum)
• Internal, 1:8,388,608
Vibration Frequency Rejection
• 0.25 Hz and above in 5 selectable steps
• 0.6 lb (0.27 kg)
Environmental Conditions
• Operating Temperature: 0 to 60°C(32 to 140°F)
• Storage Temperature: -40 to 65°C(-40 to 185°F)
Relative Humidity
• 5 to 95% (non-condensing)
Weighing Modes
• Net, Gross, Rate-of-change
• Electronic (C2)
• Traditional (test weights)
Conversion Rate
• 100 updates per second
• Class I, Div 2, Group A, B, C & D
• “OK” Module Status, bi-color LED
• “Scale 1” Functional Data, bi-color LED
• “Scale 2” Functional Data, bi-color LED
• Two-year warranty against defects in workmanship

All specifications subject to change without notice. Please
contact the Hardy factory or visit our website for the
latest specifications.



• Remote Termination Assembly (-RTA)

The weigh scale module optional Remote Termination Assembly provides
connection points between the cable assembly to the module and individual
wires from the junction box, or load sensors, of up to two scales. The RTA is
designed for standard DIN mounting rails or standoffs. With an HI 1769-
RTA configuration, the weigh scale modules can be replaced without
disturbing the wiring.

• Cable (-C6 -DC6)

Hardy provides an optional 6-foot cable assembly from the weigh scale
module to the remote termination assembly for both single and dual

• Options Ordering

Options can be ordered at the same time the module is ordered by adding
the dash designators to the end of the module number.

HI 1769-WS
Single weigh scale module alone
HI 1769-2WS
Dual weigh scale module alone
HI 1769-XX-RTA
Remote termination panel alone; supports two single-scale and one dual-scale module
HI 1769-XX-C6
Single-scale 6-foot (1.8m) cable from RTA to a single module
HI 1769-XX-DC6
Dual-scale 6-foot (1.8m) cable from RTA to 2 single modules or one dual module
HI 1769-WS-RTA-C6
Single weigh scale module with remote termination assembly and cable
HI 1769-2WS-RTA-DC6
Dual weigh scale module with remote termination assembly and cable

Hardy Process ToolboxHardy Process Toolbox

The Hardy Process Toolbox is a set of productivity tools that support industrial weighing functions. Each tool saves time, increases accuracy, improves efficiency or reduces risk in process weighing applications, including WAVERSAVER® to eliminate vibration, C2® electronic calibration and Integrated Technician® to name just a few.

The HI 1769-WS and 1769-2WS feature the following Toolbox technologies:

WAVERSAVER® vibratrion eliminator
Hardy's WAVERSAVER core technology eliminates the effects that surrounding vibration has on the scale weight signal, providing only true data for fast, accurate weight reading.

C2® (or eCAL) Electronic Calibration
The Hardy C2® (or eCAL as it is known in China) core feature provides quick and easy electronic calibration of a weighing system without the need for heavy test weights.

Hardy's INTEGRATED TECHNICIAN (IT) core feature helps you troubleshoot your weighing system and diagnose problems from the front of the instrument or via the PLC. These tests display system weights, voltages, and pass/fail displays to help isolate a problem to the instrument, cabling, or sensors, helping to reduce maintenance costs