Allen-Bradley 1783-BMS20CGN Stratix 5700 Managed Ethernet Switch

The Allen-Bradley 1783-BMS20CGN, also cataloged as the 1783-BMS20CGN Managed Ethernet Switch, operates as a dedicated hardware component for industrial network traffic management and CIP communication within EtherNet/IP platforms.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The 1783-BMS20CGN supports deterministic network topologies including Device Level Ring (DLR) and CIP Sync to maintain timing precision in high-speed control environments. Firmware flash compatibility is mandatory for integration with FactoryTalk management software; users must ensure the switch firmware supports current CIP mode and Network Access Tool (NAT) translation configurations. I/O density scaling is managed via the switch's managed backplane, allowing for robust traffic prioritization across copper and fiber media. Communication latency is minimized through hardware-accelerated packet switching, ensuring deterministic performance required for distributed control architectures.

Frequently Asked Questions (FAQ)

Q: Can the 1783-BMS20CGN fiber ports be used simultaneously with the copper combo ports?

A: No. The combo ports are designed to support either the RJ45 copper interface or the SFP fiber module interface. Only one medium can be active per combo port at any given time.

Q: Is this switch compatible with non-Allen-Bradley SFP modules?

A: Only the specified 1783-SFP series modules are validated for use with this switch. Using third-party SFP modules may result in link negotiation errors or intermittent connectivity, as the firmware utilizes specific handshake protocols for SFP detection.

Field Installation Guidelines

1. Mounting: Mount the switch on a standard 35 mm DIN rail. Ensure the device is positioned in an orientation that allows for adequate convective airflow over the enclosure.
2. Grounding: Connect the chassis ground terminal to a common industrial earth ground using a low-impedance conductor to provide surge protection and EMI immunity.
3. Cabling: Utilize Category 5e (Cat5e) or better shielded twisted-pair cabling for all copper ports. Maintain separation between network cabling and high-voltage power lines to prevent signal degradation.
4. SFP Handling: Handle SFP modules using proper ESD precautions. Insert the module until an audible click is heard, indicating full engagement with the internal locking mechanism.
5. Power Wiring: Connect the 12-24 VDC supply to the primary power input terminals. Ensure the power source is capable of providing the 30 W continuous load required by the switch during full port utilization.