SEL-2740S
Software-Defined Network Switch
Product Change Notice—Last-Time Buy SEL is announcing a Last-Time Buy (LTB) for the SEL-2740S. It will no longer be available for purchase after November 30, 2026. We recommend using the SEL-2731 Ethernet Switch or the SEL-2741 Ethernet Switch in its place. The SEL-2740S is designed to perform reliably even in the toughest environmental conditions commonly found in electric and industrial applications. The SEL-2740S is specifically developed to support IEC 61850 network requirements with industry leading performance and cybersecurity. The operational technology (OT) software-defined networking (SDN) solution supports enterprise and OT requirements ranging from real-time control to process control systems (PCSs), distributed control systems (DCSs), and SCADA. SDN Modules—Available to Order Now Software: SEL-5056 Network Management System (NMS)
Starting at
$5,360
Create Stronger Network Security
Control exactly what is allowed on your network with the deny-by-default architecture and multilayer packet inspection at each hop with the SEL-2740S. OT SDN allows you to control what devices are allowed on your network and what conversations each device is allowed to have. Only packets matching the authorized conversations are forwarded; all others are dropped or forwarded to your intrusion detection system. OT SDN also makes systems more cybersecure by eliminating legacy, attack-prone networking features, like MAC tables, the Rapid Spanning Tree Protocol (RSTP), multicast, and broadcast.
Improve Failover Performance
OT SDN proactively traffic-engineers networks, bringing more precision and predictability to critical infrastructure networks and improving failover times to less than 100 μs, two orders of magnitude less than those achieved with legacy networking technology. And with no blocked ports for RSTP, all of the SEL-2740S ports are usable for communications flows.
Streamline NERC CIP Data Collection
Use the SEL-2740S to establish inline, nonbypassable security controls for ports and services. Use the SEL-2740S and SEL-5056 with the SEL Flow Auditor application to automate information collection and reporting of NERC CIP-007-6 R1.1 without dangerous scanning or expensive truck rolls, which addresses system security management for open ports and services on cyber assets.
Manage Network Scalability and Change Management
Use the SEL-5056 to manage all network changes. All network additions and changes can be configured centrally and pushed out to configure the network of SEL-2740S switches.
Programmatically Test and Validate Your Network
Reduce deployment timelines and eliminate errors by using the SEL-5056 to programmatically test the network implementation and validate all configurations and contingencies prior to commissioning.
Synchronize Time Over the LAN With Accuracy
The SEL-2740S acts as a transparent Precision Time Protocol (PTP) clock, supporting the IEEE C37.238-2017 power system profile to ensure submicrosecond time synchronization of end devices.
SEL-2740S Features
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- Lamp Test button verifies all LEDs are functional and lets you select the LED mode
- General status indicators
- Power supply status LEDs
- Ethernet port status LEDs
- Three LED modes are available for the Ethernet port status
- Out-of-band flow controller port
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- Flow processor and alarm contact
- Five modular slots for copper or fiber Ethernet interface options (in sets of four)
- Dual power supply connections