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OVERVIEW
Official designation: Allen-Bradley 1746-IB32 (SLC 500, DC Sinking Input Module)
The 1746-IB32 is a high-density, single-slot DC Sinking input module for SLC 500, offering 32 channels of 24V DC input for reliable discrete signal monitoring.
KEY SPECS SUMMARY
Power: 5V DC, 0.05 A (backplane)
Interfaces / Ports: One 40-pin connector
Indicators: 32 channel status LEDs
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: SLC 500 fixed and modular
Limit: 32 sinking input channels
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the nominal operating voltage and current draw of the 1746-IB32 input module?
A: The module operates at 24V DC input and draws only 0.05 A from the backplane.
Wiring & Installation:
Q: What does "DC Sinking Input" mean in terms of field device wiring?
A: Sinking inputs require the field device to switch the input current path to common/ground.
Troubleshooting & Compatibility:
Q: What is the maximum signal delay time experienced by the 1746-IB32 module?
A: The maximum signal delay time for the module is 3 milliseconds (on/off).
Replacement & Upgrades:
Q: What is the suggested modern replacement platform for high-density 24V DC I/O?
A: Migration paths often utilize the Allen-Bradley CompactLogix or ControlLogix platforms.
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