html{display:none} SEL-2812 Fiber-Optic Transceivers With IRIG-B | Schweitzer Engineering Laboratories


Fiber-Optic Transceivers With IRIG-B

Improve safety, signal integrity, and reliability by using two optical fibers instead of wire to transfer bidirectional serial data plus an IRIG-B time synchronization signal. Apply for instrumentation, protection, automation, and other applications that benefit from economical fiber-optic links up to 4 km long.

Starting At


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Fiber-Optic Link—Connect a pair of transceivers and an SEL-C808 Multimode 62.5/125 µm Core Fiber-Optic Cable with ST connectors for EIA-232 communication between devices over a fiber-optic link. Create a link from 1 m to 4 km in length using SEL-2812 Fiber-Optic Transceivers With IRIG-B.

Fast Data Rates—Transfer data at rates up to 115 kbps with the SEL-2812. The SEL-2812 transfers data and IRIG-B time codes.

Safe and Secure Communications—Isolate communications connections from ground potential rise and electrical interference. The SEL-2812  also has an option for conformal coating, which provides extra protection from the effects of chemical contaminants in the air to printed circuit boards.


Transfer Data Plus Synchronize Time Economically
Use data rates up to 115.2 kbps for a full duplex serial link with up to 4 km of multimode optical fiber. Use the same transceivers/modems and fibers to simultaneously transfer simplex IRIG-B time code.

Apply Easily
Plug the transceiver/modem directly onto a standard 9-pin serial connector (DB-9). No special mounting is required. The SEL-2812 receives power from the host device via the connector; no separate power supply or power wiring is needed. It uses popular ST connectors and requires no jumpers or settings.

Improve Communications Reliability
Apply in harsh electrical and physical environments. The SEL-2812 is far less susceptible to EMI/RFI than copper links, with a maximum bit error rate of 10-9.

Improve Safety
Provide improved isolation from ground potential rise and other electrical hazards compared to copper connections. The SEL-2812 is an eye-safe, Class 1 laser product.

Mounting Kits

Use an SEL Transceiver Mounting Kit and adapter cable when connecting the transceiver to IEDs with an RJ-45 male serial connector or when the mounting depth is an issue (e.g., in switchgear applications). The following kits provide a simple and secure way to remote-mount the transceiver away from the host connector:

The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.