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OVERVIEW
Official designation: Allen-Bradley 1756-CNB (ControlLogix, ControlNet Bridge Module)
Role/Application: Facilitates high-speed deterministic data transfer between ControlLogix controllers and remote I/O devices over a ControlNet network infrastructure.
KEY SPECS SUMMARY
Power: 970mA at 5.1V DC
Interfaces / Ports: Dual BNC and RJ45 NAP
Indicators: Four status LEDs
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: ControlLogix Chassis
Limit: 64 nodes per network
Lifecycle: Active
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the maximum data rate supported by the 1756-CNB module?
A: It supports a fixed communication rate of 5 Mbps.
Wiring & Installation:
Q: Which cable type is required for the BNC network connections?
A: Use RG-6 quad-shielded coaxial cable for all ControlNet trunk lines.
Troubleshooting & Compatibility:
Q: What does a flashing red status LED on the module indicate?
A: It typically signifies a minor recoverable fault or configuration error.
Replacement & Upgrades:
Q: Can the 1756-CNB be replaced by a 1756-CN2 series module?
A: Yes, the 1756-CN2 offers higher capacity and is functionally compatible.
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| After-sales Service Contact or Customer Support Number | See this page for details |
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