Westermo SDW-550 Industrial Unmanaged Ethernet Switch

Product Overview

The Westermo SDW-550 is a rugged, unmanaged 5-port industrial Ethernet switch engineered for mission-critical applications in harsh environments. Designed with high-level galvanic isolation and dual power inputs, it ensures reliable data transmission for all standard industrial protocols, including 802.1Q long packets. With an MTBF of 675,000 hours and a fanless design, it provides exceptional long-term stability in heavy industrial settings.

Technical Specifications

• Port Count: 5 x 10/100 Base-TX Ethernet Ports

• Input Voltage: Dual power inputs, 10 – 57 VDC (24 VDC nominal)

• Isolation: Total galvanic isolation between all ports and chassis screens

• Diagnostic Features: Port mirroring on one port for network analysis

• Configuration: DIP switches for locking data rate and flow control (bypasses auto-negotiation)

• Protocol Support: 802.1Q VLAN long packets supported

• Protection Rating: IP21 (suitable for locations with condensed water)

• Operating Temperature: -25°C to +70°C (-13°F to +158°F)

• MTBF: 675,000 hours (MIL-HDBK-217F)

• Mounting: Standard 35mm DIN rail

Physical Appearance & Visual Description

• Shape & Structure: The SDW-550 features a vertical, slim-line industrial housing with a high-strength metallic chassis designed for superior heat dissipation without moving parts.

• Primary Color: Finished in a professional matte black or dark grey industrial coating, accented with high-visibility port numbering.

• Component Details: The front panel hosts five RJ-45 Ethernet ports and a set of diagnostic LEDs. A recessed DIP switch panel allows for manual port configuration without software.

• Visual Indicators: Includes LED status lights for Power (P1 & P2) and individual Link/Speed indicators for each of the five ports to simplify field troubleshooting.

• Markings: The Westermo branding and SDW-550 model name are clearly printed on the side or front panel, along with wiring diagrams for the dual power terminals.