Hardy - Model HI 1746-WS -Weighing Scale Module

The module can control two (2) relays via two (2) TTL level outputs and transmits data via the backplane to the SLC.  A 20 bit A-D converter with 980,000 counts of display resolution gives the instrument the ability to tolerate large “dead” loads, oversizing of load cells/sensors and to provide accurate weight measurement and control.

To calibrate the module, simply push the front panel “Button” to effect a C2 calibration (electronic), or you can implement a C2,“Hard” (traditional with test weights) or “Soft (manual load cell data) through the processor.

The HI 1746-WS is IT-enabled, which means the module has a built in IT excitation monitor to detect load cell wiring problems, and with the addition of the optional HI 215IT Junction Box or HI 6010 Summing Box the user can use the other IT functions for fault isolation and troubleshooting of the weighing system. The optional Hardy HI WS100 configuration software makes for easy system setup.

Power

• Provided from the SLC 500 rack: +5Vdc
• 1,000 dc minimum isolation from backplane logic circuitry

Backplane Current

• < 0.2 Amps with four 350 ohm or 1,000 ohm load sensors

Inputs

• Signal: -0.5mV through +16.5 mV
• Sense: ±5Vdc ±5%
• C2 Second Generation Calibration data
• INTEGRATED TECHNICIAN (IT), mv, mV/V weight, rsistance in ohms, excitation current

Outputs

• Excitation 5Vdc ±5% 1.15w max
• INTEGRATED TECHNICIAN (IT) reference control

Common Mode Rejection

• 100dB at or below 60 Hz

Resolution

• 20-bit A/D resolution (985,000 counts of displayed resolution over -0.5 to +16mV range)

Conversion Rate

• 20 updates per second

Setpoints Output

• Two independent TTL level drive signals

Location

• Single slot (local or remote rack)
• SLC 502, 503, 504, 505

Vibration Frequency Rejection

• 0.25 Hz and above in 5 selectable steps
• WAVERSAVER

Weight

• 1.1 lb (0.5 kg)

Weighing Modes

• Net, Gross, Rate-of-Change (ROC)

Calibration

• Electronic (C2)
• Traditional (test weights)

Certifications

• CE, UL, CUL

Warranty

• Two-year warranty against defects in workmanship

HI WS100 Configuration Software
This Windows based configuration software runs on a PC connected to the Allen-Bradley(R) SLC 500 Processor via a serial link.

Interfacing with the software is easier than writing code in ladder logic, allowing the user to:

• Configure the HI 1746-WS weigh Scale Module(s)
• Calibrate the weighing system
• Configure the two module setpoints
• Read data from the C2(R) Load Sensors
• Troubleshoot the weighing system using the INTEGRATED TECHNICIAN(R) FUNCTIONS

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 1746-WS features the following Toolbox technologies:

WAVERSAVER Vibration 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.

INTEGRATED TECHNICIAN Operator Diagnostics
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