Compact I/O Dual Weigh Scale Module | Allen-Bradley 1769-2WS
Manufacturer: Allen Bradley
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Part Number: 1769-2WS
Condition：New with Original Package
Product Type: Weigh Scale Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-2WS Compact I/O Dual Weigh Scale Module
Configured for real-time strain gauge load cell digitizing in CompactLogix systems, the Allen-Bradley 1769-2WS (1769-2WS Weigh Scale Module) provides direct physical/electrical execution. The hardware establishes a direct backplane interface with the processor to route force and tension data arrays without requiring external protocol translation bridges.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-2WS |
| Brand | Allen-Bradley |
| Origin | Standard Factory Sourced |
| Weight | 2.00 lbs (0.91 kg) |
| Dimensions | Standard CompactLogix 1769 single-slot module width |
| Operating Temp | 0 deg C to 60 deg C (32 deg F to 140 deg F) |
| Power Consumption | Provided from backplane |
| Backplane Current Draw | Less than 0.5 A at 5 VDC |
| Channels | 2 independent weigh scale inputs |
| Load Cell Support | Up to 8 x 350 Ohm load cells total across two scales |
| Excitation Voltage | 5 VDC or 10 VDC selectable |
| Input Signal Range | Plus or minus 20 mV/V full scale |
| Internal Resolution | 24-bit A/D conversion (1:8,388,608 internal counts) |
| Update Velocity | Configurable 7.5 to 60 Hz per channel; up to 100 updates/sec |
| Weighing Modes | Net, Gross, Rate-of-change |
| Common Mode Rejection | 100 dB at or below 60 Hz minimum |
EtherNet/IP Deterministic Networks and I/O Density Scaling
The dual-channel weigh module relies on direct backplane bus communication velocity to pass data structures to the processing unit during every active logic scan. When optimizing local I/O density scaling, engineers must evaluate total current draw against the rack power supply limit, as this specialized module draws less than 0.5 A at 5 VDC directly from the backplane. Incorporating this component into broader Profinet / EtherNet/IP deterministic networks requires validation of firmware flash compatibility within the programming software environment to properly initialize electronic calibration parameters and maintain synchronous channel updates without causing local bus connection timeouts.
Frequently Asked Questions
Q: Does the 1769-2WS module support hardware hot-swapping while the chassis is powered?
A: No. The module does not support removal or insertion under power. Disconnect all primary power links to the chassis backplane before servicing or installing the hardware component to prevent damage to the internal logic circuitry.
Q: How does the module handle high mechanical vibrations from industrial processing machinery?
A: The hardware incorporates selectable internal digital filtering configurations designed to suppress ambient mechanical interference above 0.25 Hz. This allows the system to stabilize data collection registers without reducing the real-time processing loop frequency.
Field Installation Guidelines
- Chassis Assembly Alignment: Align the tongue-and-groove tracks located on the module side panel with the adjacent 1769 module. Slide the unit into position and fully engage the upper and lower integrated bus locking levers to secure data trace connections across the backplane assembly.
- Shield Grounding and Cable Routing: Connect the strain gauge load cells using dedicated shielded twisted-pair cables. Terminate the copper braided shields directly at the chassis earth ground bus terminal, and isolate the sensor signal lines from AC power leads or variable frequency drive cables to mitigate electromagnetic noise coupling.
- Excitation Voltage Verification: Measure and verify the excitation voltage level selection prior to connecting the field wiring array. Ensure that the total current demand of the parallel load cell network does not exceed the rated output capacity of the internal excitation supply circuits.