The ruggedized converter works at temperatures from –40 to +85°C and incorporates protection circuitry on all receivers and transmitters for both RS232 and RS485/422 interfaces. Power input is protected from transients and features 3-kVdc isolation to prevent system ground loops. The units run on a variety of voltages including 9 to 36, 4.5 to 9, and 18 to 72 Vdc.

Other features include user-selectable fiber polarity, dual DB9 power connectors (board only) for convenience in bussed power applications, TX, RX, and Power indicator LEDs. The converter is available as a board only with threaded brackets for rack mounting in embedded applications. This unit also comes in a desktop package with DIN-rail mounting hardware for applications needing an enclosure.

Electro Standards Laboratories, Cranston, RI,