Allen-Bradley 1783-BMS10CGN Industrial Ethernet Switch – Stratix 2000

1783-BMS10CGN Allen-Bradley Stratix 2000 — 10-Port Copper Unmanaged Industrial Ethernet Switch

The Allen-Bradley 1783-BMS10CGN is a 10-port, 10/100 Mbps copper unmanaged Ethernet switch from Rockwell Automation’s Stratix 2000 product family. It occupies the deterministic-forwarding layer of an EtherNet/IP control network, providing transparent Layer 2 frame switching between PLCs, I/O adapters, variable-frequency drives, HMIs, and safety controllers without requiring any IP configuration or management overhead. In plant-floor architectures where commissioning speed, panel space, and 24 V DC power budgets are primary constraints, the 1783-BMS10CGN delivers a measurable engineering advantage over general-purpose IT switches that carry unnecessary feature overhead and incompatible power requirements.

The device operates on a store-and-forward switching fabric. Each ingress frame is fully received, its CRC verified, and only then forwarded to the appropriate egress port. This mechanism eliminates runt frames and collision-domain artifacts that would otherwise corrupt time-sensitive EtherNet/IP implicit messaging cycles. The MAC address table supports up to 1,024 entries with hardware-accelerated lookup, ensuring that unicast forwarding decisions are made at wire speed without software intervention — a prerequisite for maintaining deterministic I/O scan rates in ControlLogix and CompactLogix systems.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The 1783-BMS10CGN is built around a dedicated ASIC switching core rather than a general-purpose CPU-based forwarding engine. This architectural choice has direct consequences for determinism: forwarding latency is fixed at the hardware level, typically in the range of 3–7 µs per hop at 100 Mbps full duplex, independent of port utilization. In contrast, CPU-based switches introduce variable latency as the processor arbitrates between forwarding, management, and housekeeping tasks — a behavior incompatible with EtherNet/IP implicit I/O messaging, where jitter exceeding the RPI (Requested Packet Interval) tolerance causes connection timeouts in the ControlLogix backplane.

EMC Design Architecture: The PCB layout follows a split-plane strategy: the 24 V DC input stage is galvanically isolated from the Ethernet PHY section via a DC-DC converter with a common-mode choke on the primary side. Each RJ45 port integrates a magnetics module (Bob Smith termination topology) that provides 1,500 V AC isolation between the cable shield and chassis ground, suppressing common-mode noise injected by long cable runs in variable-frequency drive environments. The chassis ground plane is bonded to the DIN rail clip, providing a low-impedance path for shield currents — a design detail that reduces radiated emissions and improves immunity to conducted disturbances per IEC 61000-4-6.

Auto-MDI/MDI-X Crossover Detection: All 10 ports implement hardware-level auto-crossover, eliminating the need for crossover cables when connecting switch-to-switch or switch-to-NIC. The crossover detection circuit operates at the PHY layer and completes negotiation within the standard 802.3 auto-negotiation window (approximately 500 ms), ensuring that link establishment does not delay PLC startup sequences.

Power Supply Tolerance: The 18–30 V DC input range is not a simple linear regulator specification. The internal switching regulator maintains a regulated 3.3 V core supply across the full input range, meaning that a 24 V DC bus sagging to 18 V during a large motor start event does not cause a brownout reset of the switching ASIC. This is a measurable reliability advantage in panels where the PLC, drives, and switch share a common 24 V DC rail without individual UPS buffering.

System Integration Benefits

• Zero-Configuration Commissioning: No IP address assignment, VLAN configuration, or firmware initialization is required. The switch is operational within 2 seconds of power application, allowing panel builders to test network connectivity before PLC programming begins.
• EtherNet/IP Implicit Messaging Integrity: Store-and-forward architecture with CRC verification on every frame prevents corrupted frames from reaching PLC I/O adapters, eliminating the class of intermittent faults caused by runt frames in cut-through switches.
• Deterministic Forwarding Latency: ASIC-based switching delivers sub-10 µs port-to-port latency at 100 Mbps, compatible with RPI values as low as 1 ms in ControlLogix systems without introducing measurable jitter.
• 24 V DC Native Power: Eliminates the need for a separate 110/230 V AC power supply for the network switch, reducing panel wiring complexity and the number of components requiring AC isolation.
• Compact DIN-Rail Footprint: The 75 mm panel width allows installation in standard 24 V DC control panels alongside terminal blocks and power supplies without requiring a dedicated network equipment enclosure.
• Protocol-Agnostic Frame Forwarding: As a Layer 2 unmanaged switch, the 1783-BMS10CGN forwards all Ethernet frame types transparently, including EtherNet/IP, Modbus TCP, PROFINET RT, and BACnet/IP, without protocol-specific configuration.
• Rockwell Automation Ecosystem Validation: The Stratix 2000 series is tested and validated against Studio 5000 / RSLogix 5000 network performance benchmarks, providing documented compatibility with ControlLogix, CompactLogix, and Micro800 controller families.
• Extended Product Lifecycle Commitment: Rockwell Automation publishes lifecycle status for all Stratix products, enabling maintenance engineers to plan spare-parts procurement and obsolescence mitigation years in advance — a critical requirement for 10–20 year machine service contracts.
• Wide Operating Temperature Range: 0 °C to +60 °C ambient rating covers the majority of indoor industrial environments, including non-climate-controlled production areas in foundry, cement, and chemical processing facilities.
• Low Power Budget: At ≤ 4.5 W, the switch draws less than 190 mA from a 24 V DC rail, allowing it to be powered from the same supply as the PLC CPU without exceeding typical 5 A panel power budgets.

Quality Assurance & Global Logistics

Every 1783-BMS10CGN unit dispatched from our Xiamen, China facility is sourced from verified supply channels with documented chain of custody. Pre-shipment verification includes a power-on functional test confirming link negotiation on all 10 ports at both 10 Mbps and 100 Mbps, visual inspection of the DIN-rail clip, RJ45 port housings, and screw-terminal power connector, and confirmation that the unit ships in original Rockwell Automation factory packaging with intact serial number label and product documentation.

Xiamen’s geographic position — a major southern China port city with direct air freight connections to Hong Kong, Singapore, Frankfurt, Los Angeles, and Dubai — enables consistent 3–7 business day delivery to most industrial destinations in Asia-Pacific, Europe, and North America. Export documentation (commercial invoice, packing list, certificate of origin, and HS Code 8517.62 classification) is prepared for every international shipment. For project orders requiring multiple units, consolidated shipment with a single customs entry is available on request.

All units carry a 12-month warranty against manufacturing defects from the date of shipment. Dead-on-arrival (DOA) units are replaced within 7 business days of confirmed receipt. Warranty claims are processed via email with photographic evidence of the defect; return shipping for confirmed warranty cases is covered by siemensplc.com.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.