Project Description

SEL-2401 Satellite-Synchronized Clock

SEL-2401 Satellite-Synchronized Clock

Apply the low-priced SEL-2401 Satellite-Synchronized Clock everywhere you can use accurate time.

“Compact, precision-time device for limited space and high-accuracy timing to ±100 nanoseconds.”


Front- and Rear-Panel Diagrams

SEL-2401 Front Panel SEL-2401 Top/Bottom Panel
Front Top/Bottom


Reliable—Exceeds IEEE and IEC Relay Standards

Apply in harsh environments, including outdoor control enclosures. Exceeds IEEE C37.90 and IEC 60255 protective relay standards for robustness. Accurate operation from —40° to +80°C.


Apply for synchrophasor, relay event correlation, and other high-accuracy timing needs. Demodulated IRIG-B outputs with ±100 ns accuracy meet requirements for existing and future timing applications.

Low Price—High Performance

Ideal for small substations or situations where a high-quality time signal is required.

Control Applications

Use the contact output as a precision trigger for time-coordinated testing, event initiation, or other control functions.



2401 2407 2488
Substation Time Automation
Industrial Time Automation
Synchrophasor Time Standard
Control Room Viewing
Recloser Timing Source
IEEE 1344/IEEE C37.118 Time Quality Testing
Time-Synchronized Event Reporting
Source for Time-Tagged SER
Meets Synchrophasor Accuracy Requirements
Demodulated IRIG-B Output(s)
Modulated IRIG-B Output(s)
GPS Satellite Tracking
Synchronized Pulse Output
High-Gain GPS Antenna and Feed Line +
14 mm (0.56 in) Tall Display
Meets IEEE C37.90 and IEC 60255 Surge and Environmental Standards
Force Time Quality Mode (For Testing)
Rack-Mount, Panel-Mount, or Wall-Mount Hardware
Universal Power Supply
ASCII Commands and Reports
Fiber Communications Port +
Standard Feature
+ Model Option

Product Literature