Allen-Bradley 1783-US4T1F Stratix 2000 5-Port Ethernet Switch

Product Overview

The Allen-Bradley 1783-US4T1F is a Stratix 2000 unmanaged industrial Ethernet switch designed to provide simple, reliable connectivity for small-scale industrial networks. This 5-port module features four 10/100 Mbps copper RJ45 ports and one 100 Mbps multimode fiber optic port. As an unmanaged switch, the 1783-US4T1F offers "out-of-the-box" operation with no configuration required. With a compact and lightweight build of 0.38 kg (0.84 lbs), it is an ideal choice for connecting PLCs and HMIs in environments where space is at a premium and electrical noise is a factor.

Technical Configuration

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Full Model: 1783-US4T1F
• Series: Stratix 2000
• Port Count: 5 Total Ports
• Copper Ports: 4 x RJ45 (10/100 Mbps)
• Fiber Port: 1 x 100FX Multimode Fiber
• Input Power: 24V DC (18-60V DC range)

Technical Specifications

Key Features & Operational Benefits

1. Fiber Optic Connectivity: The integrated 100FX multimode fiber port allows the 1783-US4T1F to bridge distances that standard copper cables cannot reach. Fiber is inherently immune to electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring stable data transmission near high-voltage equipment and heavy industrial motors.

2. Ruggedized for Industrial Use: Unlike commercial switches, this Stratix 2000 model is built to survive extreme temperatures from -40 °C to +70 °C. Its industrial-grade metal housing provides excellent heat dissipation and mechanical protection against the vibrations common in automotive and material handling applications.

3. Zero-Configuration Setup: The 1783-US4T1F is a true plug-and-play device. It automatically negotiates speed and duplex settings for each connected device. This eliminates the need for IT intervention and simplifies the replacement process in the field, reducing downtime during maintenance cycles.

Installation Guidelines

DIN Rail Mounting: Snap the switch onto a standard 35mm DIN rail in a horizontal or vertical orientation. Ensure that there is sufficient clearance (at least 50mm) around the unit for air circulation, especially when operating in high-temperature environments.

Powering the Unit: Connect the switch to a stable 24V DC power source using the provided terminal block. The 1783-US4T1F supports a wide input range of 18-60V DC, offering flexibility when integrating into existing control panels.

Fiber Connection: When connecting the multimode fiber port, ensure the fiber connectors are clean and properly seated. The 1310 nm wavelength is optimized for long-distance factory floor links without the need for additional signal repeaters.

Technical FAQs

Q: What is the maximum distance for the fiber port?
A: The 100FX multimode fiber port typically supports distances up to 2 kilometers (1.2 miles), depending on the quality of the fiber optic cable used.

Q: Can the 1783-US4T1F be used in a Ring topology?
A: As an unmanaged switch, it does not support Device Level Ring (DLR) or Spanning Tree Protocol (STP). It is designed for linear or star topologies only.

Q: Is the switch compatible with 10 Mbps devices?
A: Yes, the four copper ports feature auto-negotiation and will automatically detect and support both 10 Mbps and 100 Mbps Ethernet devices.