Improve Communications Reliability
Use data rates up to 115.2 kbps for a full-duplex serial link with up to 4 kilometers of multimode optical fiber. This is far less susceptible to EMI/RFI than copper links, with a maximum bit error rate of 10^-9. Apply in harsh electrical and physical environments.

Apply Easily
Plug the transceiver/modem directly onto a standard 9-pin serial connector (DB-9). No special mounting is required. The SEL-2814 uses popular ST connectors and requires no jumpers or settings. Eliminate the need for special adapters by using the selector switch to choose DCE or DTE pin usage.

Use Control Lines to Improve Operation
Use the same transceivers and fibers to simultaneously transfer duplex data plus a control signal in each direction. Use for data flow-control to prevent overrunning buffers, key transmitters, or sense equipment problems.

Choose Best Power Source
Provide power from the host device; no separate power supply or power wiring is needed. Or, if the host cannot provide a control line for power, connect an external power supply to the power input jack.

Improve Safety
Provide improved isolation from ground potential rise and other electrical hazards compared to copper connections. The SEL-2814 is an eye-safe, Class 1 laser product.