1771-WS Allen-Bradley PLC-5 Weigh Scale Module

Product parameters

General parameters

Module type: Weigh Scale Module, single channel

Product Number: 1771-WS (Series B, some suppliers may provide Series A)

Installation method: Insert the Allen-Bradley 1771 general-purpose I/O rack

Protection grade: IP00 (Open type, needs to be installed in a protective cabinet)

Operating temperature: 0°C to 60°C (32°F to 140°F)

Storage temperature: -40°C to 85°C (-40°F to 185°F)

Relative humidity: 5% to 90% (non-condensing)

Seismic resistance: 15 g (peak at 11 ms, IEC 68-2-27)

Vibration resistance: 2 g (10-500 Hz, IEC 68-2-6)

Certification: UL, C-UL, applicable to Class I, Division 2, Groups A, B, C, D or non-hazardous areas

Electrical parameters

Power supply requirements:

Backplane power supply: 5V DC ±5%, 1.5A

Backplane input voltage: Continuous 40V DC

Isolation voltage: 1000V DC (from the backplane to the load cell)

Excitation voltage: 10V DC ±5%, maximum 1.5W, driving up to 4 350 Ω load cells (external power supply can support 8)

Input signal: 0-30 mV differential signal

Resolution: Over one million counts (0-30 mV range)

Frequency: 0.25 Hz (typical value, used for signal processing)

Common-mode rejection ratio: 100 dB

Wire size: 14 AWG (can be clamped directly or use a shovel-shaped joint)

Status indicator light:

Run/Fault: Red/green dual-color LED

Calibration /Communication: Red/green dual-color LED

Communication and Compatibility

Communication: Communicate with the PLC-5 processor through the backplane of the 1771 I/O rack, using the Block Transfer method

Supported sensors: Up to 4 350 Ω full-bridge strain gauge load cells (8 supported by external power supply)

Compatible racks: 1771 universal I/O racks (such as 1771-A1B, A2B, A3B, A4B)

Calibration method: Supports both traditional calibration and Hardy C2® electronic calibration technology

Function

High-precision weighing

Read 0-30 mV differential signals, provide high resolution of over one million counts, suitable for precision weighing applications.

Supports up to 8 load cells (external power supply required), suitable for single-container weighing.

Data transmission

The calibration values and weight data are sent to the PLC-5 processor through block transmission and integrated into the control system.

A 100 dB common-mode rejection ratio ensures the signal's anti-interference capability.

Calibration and Diagnosis

Supports Hardy C2® electronic calibration technology, simplifies the calibration process and reduces the demand for physical weights.

Built-in diagnostic switches and dual-color leds (operation/fault, calibration/communication) facilitate status monitoring and troubleshooting.

Automatic zero-point tracking

Automatically adjust the zero point of the weighing system to adapt to changes such as material accumulation, and support adjustable zero point tolerance.

High reliability

Sensitive to electrostatic discharge (ESD), it is necessary to operate with a grounded wrist strap or after touching a grounded object.

It complies with the hazardous area certification of Class I and Division 2 and is suitable for specific industrial environments.

Compatibility

Seamlessly integrated with the 1771 general-purpose I/O rack and PLC-5 series processors to expand the weighing function.

Supports 4 or 8 350 Ω load cells, suitable for a variety of industrial weighing devices.

Application scenarios

Manufacturing industry: Used for weight detection on production lines, such as weighing parts, products or packaging materials.

Process control: In the chemical and food and beverage industries, it is used to monitor the weight of materials in individual containers (such as storage tanks and hoppers).

Packaging and sorting: Support weight control in packaging equipment to ensure that products meet specifications.

Material management: It is used in warehouses or logistics systems to monitor the weight of inventory materials.

Traditional PLC system: Integration with PLC-5 system, suitable for the expansion or replacement of weighing functions in old factories.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

Bou L(Sales Manager)            

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