1769-2WS Allen-Bradley Weigh Scale Module

1769-2WS Allen-Bradley Weigh Scale Module | New & Original Stock

Availability: 99 left in stock

Allen-Bradley 1769-2WS Compact I/O Weigh Scale Module The Allen-Bradley 1769-2WS, also cataloged as the 1769-2WS Dual-Channel Weigh Scale Interface, operates...

SKU: 1769-2WS

Manufacturer: Allen Bradley
Product No.: 1769-2WS
Product Type: Weigh Scale Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 280g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1769-2WS Compact I/O Weigh Scale Module

The Allen-Bradley 1769-2WS, also cataloged as the 1769-2WS Dual-Channel Weigh Scale Interface, operates as a dedicated hardware component for strain gauge-based load cell data acquisition within Compact I/O platforms. Configured for direct physical connection to weigh sensors, the device samples physical force signals and transfers calibrated data registers directly to a CompactLogix or MicroLogix 1500 controller across the system backplane.

Hardware Specifications

Parameter	Specification
Model	1769-2WS
Brand	Allen-Bradley
Origin	USA
Weight	0.28 kg
Dimensions	Standard 1769 Compact I/O module profile
Operating Temp	-40 to +70 deg C
Power Consumption	5.1 VDC at 2.0 A maximum backplane current draw
Module Type	Dual-Channel Weigh Scale Interface
Excitation Voltage	5 VDC +-1% (Regulated)
Load Cell Support	Up to eight 350-ohm sensors (4 per channel)
Internal Resolution	24-bit internal ADC
Input Signal Range	-0.5 mV/V to +3.5 mV/V
Isolation	1500 VDC (Channel-to-Channel and Channel-to-Backplane)
Sample Rate	10 to 250 samples per second (User-selectable)
Calibration Type	Software-based (Zero, Span, and Tare via PLC logic)

Backplane Bus Communication & I/O Density Scaling

The weigh module interfaces with the processor via the native backplane bus communication velocity. It utilizes a 24-bit internal Analog-to-Digital Converter (ADC) to transform millivolt-level strain gauge readings into digital values, managing real-time data streaming without requiring external transmitters. This configuration maximizes local I/O density scaling by supporting up to four 350-ohm load cells per channel on two fully independent circuits. The 1500 VDC isolation barrier separates field-side sensor loops from the digital logic bus, preventing high-frequency common-mode noise propagation across deterministic networks.

Frequently Asked Questions

Q: What is the maximum distance supported between the 1769-2WS module and the connected load cells?

A: The physical distance depends on wire gauge and ambient electrical noise, but standard implementations require 6-wire shielded cable for distances exceeding 15 meters to offset excitation voltage drops through automatic remote sensing.

Q: Can this module operate in an I/O bank located away from the primary controller?

A: Yes. The module is fully compatible with the 1769-AENTR Ethernet adapter, allowing installation in decentralized remote I/O configurations across deterministic EtherNet/IP networks.

Field Installation Guidelines

Secure the module onto a 35mm DIN rail or panel mount plate, verifying that the adjacent bus levers click completely to lock the physical backplane contacts.
Route all low-level load cell signal wiring inside dedicated, grounded steel conduits away from high-voltage AC motor lines or variable frequency drive cables.
Connect the load cell cable shield explicitly to the local enclosure subpanel earth terminal, ensuring the shield remains ungrounded and isolated at the load cell body.
Verify that the total current draw of all combined modules in the local bank does not exceed the maximum rating of the 1769 power supply unit.

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