html{display:none} Dependable Communications for Critical Infrastructure | Schweitzer Engineering Laboratories

Dependable Communications for Critical Infrastructure


Communication solutions at SEL provide reliable, secure, and deterministic data connectivity for demanding mission-critical applications. From wide- and local-area networking, security, and precise time to radios, transceivers, and cables, we offer an extensive product line that combines dependability and security for reliable communication in today’s critical infrastructure systems.

SEL ICON Integrated Communications Optical Network

The SEL ICON is a wide-area-networking multiplexer optimized for industrial and utility applications. The deterministic packet transport technology in the ICON preserves the performance characteristics of time-division multiplexing (TDM) with no performance degradation when converting to Ethernet as a transport protocol. By combining TDM and Ethernet transport options with a comprehensive range of data interfaces, the ICON makes it easy to migrate legacy network technologies to a packet-based solution. The ICON interoperates with Multiprotocol Label Switching (MPLS) or Carrier Ethernet-based core networks to provide a hardened edge device for mission-critical applications.

Ethernet Switches

SEL Ethernet switches are designed for the harsh environments commonly found in the energy and utility sectors. The SEL-2740S Software-Defined Network Switch is the industry’s first software-defined networking (SDN)-enabled switch and improves Ethernet performance in mission-critical applications. It enables stronger network security through deny-by-default access control, making it a perfect solution for the implementation of secure Ethernet communications. In addition, SEL has a family of standard Ethernet switches, including the SEL-2730M Managed 24-Port Ethernet Switch, SEL-2730U Unmanaged 24-Port Ethernet Switch, and SEL-2725 Five-Port Ethernet Switch.

Ethernet Security Gateways

The SEL-3620 Ethernet Security Gateway and SEL-3622 Security Gateway are interoperable with Cisco routers and OPSAID-compliant devices. Site-to-site Ethernet communications are protected with an IPsec virtual private network (VPN), and private networks are secured with a stateful firewall, all in a design that can survive harsh environments. The SEL-3620 supports up to 16 VPN connections, provides up to 60,000 security event reports, and applies an IRIG-B clock signal for precise event time tagging. The SEL-3622 is designed to secure remote cabinets and enclosures and integrates physical awareness sensors through an onboard accelerometer, light sensor, and input contact sensor.


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