Allen-Bradley 1769-WS Weigh Scale Module

The Allen-Bradley 1769-WS, also cataloged as the 1769-WS Weigh Scale Module, operates as a dedicated hardware component for weight signal conditioning and digitization within CompactLogix controller platforms.

Suffix Breakdown & Model Matrix

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks and Driver Integration

The 1769-WS module incorporates advanced signal processing circuitry to condition and digitize weight inputs at 100 updates per second across deterministic control loops. It maintains high backplane bus communication velocity compatibility and precise conversion timing to ensure synchronized execution in CompactLogix distributed topologies. Furthermore, internal WAVERSAVER vibration rejection, firmware flash compatibility, and robust electromagnetic isolation guarantee reliable measurement accuracy under high I/O density scaling demands.

Frequently Asked Questions

Q: What power source is utilized by the 1769-WS weigh scale module during operation?

A: The module receives its operating power directly from the rack backplane, requiring less than 0.5 Amps at 5 VDC.

Q: How many 350-ohm load cells can be driven by the module's excitation output?

A: The 5 VDC excitation output is capable of powering up to four 350-ohm load cells linked to a single scale channel.

Field Installation Guidelines

Ensure that all rack power distribution feeds and local control loops are completely de-energized, locked out, and tagged prior to mounting or wiring the 1769-WS module. Secure the unit firmly into the CompactLogix rack assembly using the integrated latching mechanism, maintaining proper grounding to preserve signal integrity. Terminate load cell wiring securely into the terminal block, verifying correct polarity, excitation voltage, and shield continuity before restoring system power.