Satellite-Synchronized Network Clock Released by SEL

The SEL-2488 satellite-synchronized network clock. Photo: SEL

SEL has released a new network clock designed for critical infrastructure and harsh environments. Model SEL-2488 receives GNSS time signals and distributes precise time via multiple output protocols, including IRIG-B and NTP.

The SEL-2488 provides time-delay compensation for antenna cables and output cables on per-port basis to further optimize time distribution accuracy. For security, the clock features the Syslog Ethernet standard for event messaging, role-based accounts and LDAP for user authentication, and secure HTTPS web interface.

The clock synchronizes with precise time accuracy to within ±40 nanoseconds to UTC for power protection applications. The standard TCXO holdover accuracy is 36 µs/day and the optional OCXO holdover accuracy is5 μs/day.

Time can be distributed from eight time outputs configurable for IRIG-B or time pulse outputs. The SEL-2488 also includes four standard Ethernet ports, which provide NTPv4 and are available in copper as well as single- or multimode fiber.

With Satellite Signal Verification, the SEL-2488 uses signals from a second satellite constellation to validate the GPS time signals, providing a layer of protection from GPS spoofing attacks. The SEL-2488 also provides an option for a second, redundant power supply and operates in a temperature range of –40° to +85°C (–40° to +185°F).

The SEL-2488 supports DHCP with a captive portal, LDAP, an HTTPS device webpage, and acSELerator QuickSet SEL-5030 software for easy and secure configuration.