html{display:none} Communications | Schweitzer Engineering Laboratories


Use SEL communications solutions to enable secure remote access to substation IEDs and distribution control devices beyond substations. Remote communication allows faster response to problems and increased efficiency of utility resources. 

Communications hero

Apply SEL communications solutions to:

  • Collect current and voltage measurements from across the system.
  • Operate reclosers and switches remotely and monitor status.
  • Locate temporary and permanent faults.
  • Implement LANs in your substations.
  • Provide security gateways for IEDs.
  • Increase network security with software-defined networking (SDN).
  • Lay the foundation for distribution automation and power quality solutions.

Plus, when you choose an SEL solution, you get more than just a product—you get the industry’s best customer service and technical support.

Our communications devices are tested to the same high standards as our relays and carry the same ten-year warranty


SEL-3620 Ethernet Security Gateway

A router, VPN endpoint, and firewall device for serial- and Ethernet-based IEDs, offering 16 serial ports and 3 Ethernet ports.


    SEL-3622 Security Gateway

    A router, VPN endpoint, and firewall device for serial- and Ethernet-based IEDs, offering cybersecurity plus physical awareness sensors for ultimate tamper resistance.


      SEL-3061 Cellular Router

      Extend Ethernet or serial communication using cellular technology secured by IPsec tunneling.


      SEL-3031 Serial Radio Transceiver

      Communicate with multiple remote radios for SCADA and other data-gathering applications. The SEL-3031 supports point-to-point (P2P) and point-to-multipoint (P2MP) operational modes.


      SEL-2925 BLUETOOTH Serial Adapter

      Plug the SEL-2925 into the serial port of a recloser control, relay, or other device to control and monitor equipment from a distance. Keep personnel safe and equipment enclosures secure.


      SEL-2730M Managed 24-Port Ethernet Switch

      Provide Ethernet connectivity for SCADA, engineering access, and control.


      SEL-2740S Software-Defined Network Switch

      The industry’s first field-hardened SDN-enabled network switch. Centralized traffic engineering puts you in control of your communications flows.


      SEL-2725 Five-Port Ethernet Switch

      Build reliable, safe Ethernet networks with this compact network switch and copper-to-fiber-optic media converter.


      OPNsense on SEL Hardware

      Enhance the resilience of network communications by providing stateful firewall tracking, deep-packet inspection, adaptive routing, and hardware failover.

      Products and Service You Can Rely On

      SEL products are designed and manufactured for the world’s most challenging environments, exceeding all industry standards for temperature, shock, and electric stress. An optional conformal coating for circuit boards adds an extra level of protection against contaminants in extreme environments.

      Every SEL product comes with a ten-year warranty—the best in the industry. If any product fails under warranty, we’ll repair or replace it for free.

      Questions? Contact Us!

      We’re happy to answer all your questions and help develop the best solution for your needs.

      Contact Engineering Services


      Unbeatable Support

      SEL support teams are stationed in regional offices around the world and staffed with application engineers who are experts in our products and in power system applications.

      Technical support for SEL-manufactured devices is always free. No matter how often you need to call or how long your SEL products have been in service, you’ll reach an SEL expert who can provide the service and support you need.

      Our cybersecurity team is always ready with the information and resources needed to keep your OT networks and critical systems secure and working effectively. Cyber services support contracts can include incident response, audits, system hardening, and more, depending on your anticipated needs.