SEL-2741
Ethernet Switch
The SEL-2741 is a versatile managed Ethernet switch that supports operational technology (OT) software-defined networking (SDN) and Rapid Spanning Tree Protocol (RSTP) networking technologies. Optimized for OT environments, the SEL-2741 supports critical infrastructure applications including IEC 61850 networks, protection-class Ethernet networks, engineering access, SCADA, and process control systems. It is designed for extended product lifecycles and high reliability, even in the toughest environmental conditions, and it is backed by our industry-leading ten-year warranty. Software: SEL-5056 Network Management System (NMS) SFP Transceiver Options
Starting at
$5,080
Build Your Perfect 24-Port Switch
Choose from copper or small form-factor pluggable (SFP) options on 24 1 Gbps and 100 Mbps ports. Mix and match port types in groups of four. The SEL-2741 offers flexible mounting options and wide-range dual power supplies. It supports both SEL and non-SEL fiber SFPs with a generous power budget.
Future-Proof Your System
Order the SEL-2741 with either RSTP-based or OT SDN-based control plane technology. With a simple firmware upgrade, you can field convert between RSTP and OT SDN.
Synchronize Time Over the LAN With Accuracy
The SEL-2741 is a transparent Precision Time Protocol (PTP) clock that supports the IEEE C37.238-2017 power system profile to ensure submicrosecond time synchronization of end devices.
Operate in Tough Environments
The SEL-2741 is designed without fans or other moving parts, increasing its operational lifetime. It is built and tested for reliable operation in extreme environments, meeting or exceeding IEEE 1613 (Class 1) and IEC 61850-3 standards for communications devices in electric power substations.
RSTP
Simplify Network Commissioning
Installing and configuring the SEL-2741 is simple. You can easily set up priority messaging with VLANs, which ensures the transmission of IEC 61850 GOOSE messages and current differential traffic to IEDs while segmenting protection, control, and automation traffic. Update settings either through a secure web interface or by importing configuration files. Using configuration files makes backups and restoration easy.Preserve Network Integrity
Use the Bridge Protocol Data Unit (BPDU) Guard in the SEL-2741 to prevent unauthorized network extensions. Protect client saturation with rate limiting.Easily Segment and Monitor a Flexible Network Topology
Use any of the available 4,094 VLANs for switch-to-switch connections with the SEL-2741. Monitor VLAN configurations with easy-to-read graphics. Monitor the status through Syslog and the Simple Network Management Protocol (SNMP).Quick NMS Integration
Integrate the SEL-2741 with leading network management systems to render network topology, RSTP states, VLAN memberships, and host address and locations, thanks to extensive SNMP management information base (MIB) support. Set traps to alert you when events happen on your network.Reliable and Secure Network Engineering
Protect against unintentional or malicious device connections and cable imperfections with the media access control (MAC) security and port-monitoring features. Dynamic and static MAC security ensures that only the devices you expect can connect to your network. Port monitoring watches for and disables ports when the link or communication integrity is compromised, such as in link flapping or cyclic redundancy check (CRC) packet errors, preventing them from spreading and impacting the whole network. Provide central authentication with the Lightweight Directory Access Protocol (LDAP) or one- or two-factor authentication with Remote Authentication Dial-In User Service (RADIUS).
Installing and configuring the SEL-2741 is simple. You can easily set up priority messaging with VLANs, which ensures the transmission of IEC 61850 GOOSE messages and current differential traffic to IEDs while segmenting protection, control, and automation traffic. Update settings either through a secure web interface or by importing configuration files. Using configuration files makes backups and restoration easy.Preserve Network Integrity
Use the Bridge Protocol Data Unit (BPDU) Guard in the SEL-2741 to prevent unauthorized network extensions. Protect client saturation with rate limiting.Easily Segment and Monitor a Flexible Network Topology
Use any of the available 4,094 VLANs for switch-to-switch connections with the SEL-2741. Monitor VLAN configurations with easy-to-read graphics. Monitor the status through Syslog and the Simple Network Management Protocol (SNMP).Quick NMS Integration
Integrate the SEL-2741 with leading network management systems to render network topology, RSTP states, VLAN memberships, and host address and locations, thanks to extensive SNMP management information base (MIB) support. Set traps to alert you when events happen on your network.Reliable and Secure Network Engineering
Protect against unintentional or malicious device connections and cable imperfections with the media access control (MAC) security and port-monitoring features. Dynamic and static MAC security ensures that only the devices you expect can connect to your network. Port monitoring watches for and disables ports when the link or communication integrity is compromised, such as in link flapping or cyclic redundancy check (CRC) packet errors, preventing them from spreading and impacting the whole network. Provide central authentication with the Lightweight Directory Access Protocol (LDAP) or one- or two-factor authentication with Remote Authentication Dial-In User Service (RADIUS).
OT SDN
Create Stronger Network Security
Control exactly what is allowed on your network. The SEL-2741 and SEL-5056 Network Management System (NMS) software have a deny-by-default architecture and deliver multilayer packet inspection at each hop. Only packets matching authorized communications flows are forwarded; all others are dropped or sent to your intrusion detection system. OT SDN also makes systems more cybersecure by eliminating legacy, attack-prone networking features, like media access control (MAC) tables, RSTP, multicast, and broadcast.Improve Failover Performance
Proactively engineer your network traffic with OT SDN. This solution brings more precision and predictability to critical infrastructure networks, reliably supporting even the most demanding control system signals, such as Sampled Values. The failover time is up to two orders of magnitude faster than what legacy networking technology can achieve. And since there are no blocked ports for RSTP, you can use all SEL-2741 ports for communications flows.Improve Network Stability
Use proactive traffic-engineered circuits to eliminate broadcast storms caused by network loops.Streamline NERC CIP Data Collection
Use the SEL-2741 to establish inline, non-bypassable security controls for ports and services. Use the SEL-2741 and SEL-5056 NMS software with the SEL Flow Auditor application to automate information collection and reporting of NERC CIP-007-6 R1.1 without dangerous scanning or expensive site visits, which addresses system security management for open ports and services on cyber assets.Centralize Network Configuration and Updates
Manage your network, not individual switches. The SEL-5056 NMS software centralizes network configuration and all changes to the network, eliminating the need to update settings in individual switches.
Control exactly what is allowed on your network. The SEL-2741 and SEL-5056 Network Management System (NMS) software have a deny-by-default architecture and deliver multilayer packet inspection at each hop. Only packets matching authorized communications flows are forwarded; all others are dropped or sent to your intrusion detection system. OT SDN also makes systems more cybersecure by eliminating legacy, attack-prone networking features, like media access control (MAC) tables, RSTP, multicast, and broadcast.Improve Failover Performance
Proactively engineer your network traffic with OT SDN. This solution brings more precision and predictability to critical infrastructure networks, reliably supporting even the most demanding control system signals, such as Sampled Values. The failover time is up to two orders of magnitude faster than what legacy networking technology can achieve. And since there are no blocked ports for RSTP, you can use all SEL-2741 ports for communications flows.Improve Network Stability
Use proactive traffic-engineered circuits to eliminate broadcast storms caused by network loops.Streamline NERC CIP Data Collection
Use the SEL-2741 to establish inline, non-bypassable security controls for ports and services. Use the SEL-2741 and SEL-5056 NMS software with the SEL Flow Auditor application to automate information collection and reporting of NERC CIP-007-6 R1.1 without dangerous scanning or expensive site visits, which addresses system security management for open ports and services on cyber assets.Centralize Network Configuration and Updates
Manage your network, not individual switches. The SEL-5056 NMS software centralizes network configuration and all changes to the network, eliminating the need to update settings in individual switches.
SEL-2741 Features
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- General status indicators
- Power supply status LEDs
- Ethernet port status LEDs (three LED modes available)
- Configurable label
- Out-of-band flow controller port
- Mounting options for rack, surface or panel
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- 24 Ethernet ports
- Two digital inputs
- One form C alarm contact
- Redundant power supply options