Allen-Bradley 1783-US5T – 5-Port Unmanaged Industrial Ethernet Switch | Stratix 2000 Platform
Engineering Background
The Stratix 2000 series was developed by Rockwell Automation to address the growing demand for plug-and-play Ethernet connectivity in industrial control environments. Designed to operate without configuration overhead, the 1783-US5T delivers deterministic, low-latency Layer 2 switching in environments where simplicity, reliability, and DIN-rail form factor are paramount.
Product Positioning
The 1783-US5T is the entry-level workhorse of the Stratix family — purpose-built for machine-level network segmentation, PLC-to-HMI connectivity, and distributed I/O integration. It is the preferred choice for OEMs and system integrators who require certified industrial-grade switching without the complexity of managed configurations.
Complete Technical Specifications
- Part Number: 1783-US5T
- Series: Stratix 2000
- Manufacturer: Allen-Bradley / Rockwell Automation
- Switch Type: Unmanaged Layer 2 Ethernet Switch
- Number of Ports: 5 × RJ-45 (10/100BASE-TX, Auto-MDIX)
- Data Rate: 10/100 Mbps per port, full/half duplex auto-negotiation
- Switching Capacity: 1 Gbps backplane
- Input Voltage: 24V DC (18–32V DC operating range)
- Power Consumption: ≤ 3.5 W typical
- Operating Temperature: 0 °C to +60 °C (32 °F to 140 °F)
- Storage Temperature: −40 °C to +85 °C
- Relative Humidity: 5–95% non-condensing
- Mounting: 35 mm DIN rail
- Enclosure Rating: IP20
- Dimensions (H × W × D): 99 × 22.5 × 114 mm
- Weight: ~600 g (with packaging)
- Certifications: UL 508, CE, cULus, RCM, ATEX Zone 2 (Class I Div 2)
- EMC Compliance: IEC 61000-4 series, EN 55032
- MTBF: >500,000 hours
- LED Indicators: Per-port Link/Activity, Power status
- Configuration: Zero-configuration, no software required
Proven Application Environments
- Machine-Level Networking: Connecting PLCs (ControlLogix, CompactLogix, MicroLogix) to HMIs, drives, and remote I/O within a single machine cell
- Distributed Control Systems: Extending Ethernet segments to field devices in DCS architectures
- OEM Panel Builds: Space-constrained control panels requiring slim DIN-rail Ethernet switching
- Automotive & Assembly Lines: High-cycle manufacturing environments with vibration and thermal stress
- Food & Beverage: Washdown-adjacent areas (IP20 rated; pair with IP67 enclosure for wet zones)
- Water/Wastewater: Remote pump stations and SCADA edge nodes
- Oil & Gas: Class I Division 2 hazardous locations (with appropriate enclosure)
Engineering Advantages
- Zero Configuration: Ships ready to install — no IP address, no CLI, no commissioning time
- Auto-MDIX on All Ports: Eliminates crossover cable requirements; any cable topology works
- Wide Input Voltage Range (18–32V DC): Compatible with standard 24V DC industrial power rails without additional regulation
- Compact 22.5 mm Width: Minimal panel real estate; fits alongside terminal blocks on standard DIN rail
- Rockwell Ecosystem Native: Fully compatible with Studio 5000, FactoryTalk View, and EtherNet/IP device trees without driver conflicts
- Industrial-Grade MTBF: >500,000 hours rated — designed for 24/7 continuous operation
- Conformal Coating Option: Available in -CC variant for high-humidity or corrosive environments
System Architecture & Signal Flow
The 1783-US5T operates as a transparent Layer 2 bridge. All five RJ-45 ports share a common switching fabric with store-and-forward packet handling. The switch learns MAC addresses dynamically (MAC table: 1K entries) and forwards frames based on destination MAC, providing effective collision domain isolation per port.
Typical topology: CompactLogix L3x → 1783-US5T Port 1 | PanelView Plus 7 → Port 2 | PowerFlex 525 Drive → Port 3 | Point I/O Adapter → Port 4 | Upstream managed switch uplink → Port 5.
EtherNet/IP implicit (Class 1) and explicit (Class 3) messaging passes transparently. No QoS or VLAN configuration is available or required at this layer — traffic prioritization should be handled at the upstream managed switch (e.g., Stratix 5700/5400).
Sourcing & Quality Verification
- Origin: Genuine Allen-Bradley / Rockwell Automation product
- Condition: New surplus / refurbished units available — condition specified at order confirmation
- Traceability: Each unit ships with original Rockwell catalog label and date code visible
- Inspection Protocol: Visual inspection, power-on functional test, port link verification prior to dispatch
- Packaging: Anti-static bag + foam-lined carton; original Rockwell packaging where available
- Warranty: 12-month Konmask operational warranty; DOA replacement within 7 days
Procurement Process
- Inquiry: Submit your BOM or part number via the product page or email support@konmask.com
- Quote: Receive a formal quotation within 1 business day including lead time and condition disclosure
- Order Confirmation: Purchase order or online checkout accepted; proforma invoice available for wire transfer
- Inspection & Dispatch: Unit tested and dispatched within 1–3 business days
- Shipping: DHL Express / FedEx International Priority standard; EXW Xiamen available for freight forwarder arrangements
- Documentation: Commercial invoice, packing list, and test report provided; CO and FORM E available on request
Technical FAQ
Q: Can the 1783-US5T support EtherNet/IP implicit messaging?
A: Yes. As an unmanaged Layer 2 switch, it passes all EtherNet/IP traffic transparently including Class 1 (implicit/cyclic) I/O connections. No configuration is required.
Q: Is this switch compatible with ControlLogix and CompactLogix PLCs?
A: Fully compatible. The Stratix 2000 is a native Rockwell Automation product and integrates seamlessly into any EtherNet/IP topology.
Q: What is the maximum cable length per port?
A: 100 m (328 ft) per IEEE 802.3 standard using Cat5e or Cat6 UTP/STP cable.
Q: Does it support PoE (Power over Ethernet)?
A: No. The 1783-US5T does not provide or pass PoE. For PoE requirements, refer to the Stratix 5700 managed switch series.
Q: Can I use this in a Class I Division 2 hazardous location?
A: Yes, with appropriate enclosure. The 1783-US5T carries ATEX Zone 2 / Class I Div 2 certification when installed per Rockwell’s hazardous location installation guidelines.
Q: What is the difference between 1783-US5T and 1783-US5TG?
A: The 1783-US5TG adds one SFP Gigabit fiber uplink port for fiber backbone connectivity. The 1783-US5T is all-copper 10/100 Mbps.
Q: Do you provide a certificate of conformance?
A: Yes. A Konmask inspection report is provided with every shipment. Rockwell OEM CoC is available for new-in-box units.
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