SEL-3405

Time-Synchronize Remote Devices—Use the SEL-3405 to send IRIG-B across distances where installing a GPS antenna is not feasible. Using a pair of SEL-3405 transceivers (with one connected at the clock and another at the end device), the end device will receive delay-compensated IRIG-B without requiring user-configured settings. The SEL-3405 can receive time from any SEL clock and send it to any end device. The SEL-3405 automatically adjusts for the delay that occurs as the signal moves though the fiber. Send time between individual devices, or install the transceivers in a ring to provide <1 µs accurate IRIG-B signals to as many as three devices simultaneously.

Benefits of Sending Time Over Fiber—Using the SEL-3405 to distribute IRIG-B time signals increases reliability because fiber-optic cables are far less susceptible to electromagnetic interference (EMI)/radio frequency interference (RFI) than copper links and provide improved isolation from ground potential rise and other electrical hazards. 

IRIG-B Where You Need It—GPS antennas require a clear view of the sky in all directions. This may not be possible for all installation locations. Whether the device that needs accurate time is at the bottom of the dam or in a hard-to-reach location, the SEL-3405 provides accurate IRIG-B time.

Time-Synchronization Pass-Through—The SEL-3405 can pass any demodulated timing signal (e.g., IRIG-B or pulse per second [PPS]) over a single multimode fiber and maintain a timing accuracy of better than 2 µs.