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OVERVIEW
Official designation: Allen-Bradley 1757-FFLD2 (ControlLogix, Foundation Fieldbus Linking Device)
Role/Application: This dual-channel bridge integrates Foundation Fieldbus H1 networks with EtherNet/IP, enabling seamless high-speed process data exchange for ControlLogix controllers.
KEY SPECS SUMMARY
Power: 500mA at 24V DC
Interfaces / Ports: RJ45, Two H1 Ports
Indicators: Four Status LEDs
Operating Temp: 0 degrees C to 60 degrees C
Platform / Compatibility: EtherNet/IP Systems
Limit: 16 Devices per Port
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the maximum number of Fieldbus devices supported by the 1757-FFLD2?
A: It supports up to 32 devices total across two H1 channels.
Wiring & Installation:
Q: Does the module require an external power supply for the H1 segments?
A: Yes, external Fieldbus power supplies are required for segment operation.
Troubleshooting & Compatibility:
Q: How can a user identify a communication failure on the H1 segment?
A: Monitor the dedicated H1 status LEDs on the module front panel.
Replacement & Upgrades:
Q: What is the recommended replacement for the discontinued 1757-FFLD2?
A: The 1788-EN2FFR is the current functional replacement for this module.
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