Comnet FDX55S2E RS232/422 Fiber Transceiver
Overview
The FDX55S2E is an RS232/422 line-terminating transceiver that converts serial data to single-mode fiber, enabling transmission over distances where copper would drop signal or introduce noise—roadside cabinets, traffic management systems, and utility sites where 1310/1550 nm wavelengths carry RS232/422 data reliably. This unit is built for unattended outdoor deployment: it runs on 115 VAC with 12 hours of battery backup, so brief power loss won't interrupt your serial control or telemetry feed.
Compatibility
The FDX55S2E works with any system using standard EIA RS232C/D or RS422 serial interfaces—traffic signal controllers, SCADA devices, access control panels, gate operators, and surveillance video transmission systems that require serial protocol over fiber. It terminates at a single ST connector (single-mode fiber), so you'll need corresponding fiber infrastructure and a paired transceiver at the remote end. Compatible with NEMA TS-1 and TS-2 traffic control environments and Caltrans highway deployment standards.
Installation Notes
Mount stand-alone or in a standard rack enclosure. The 115 VAC mains supply and 12-hour battery backup mean you need access to line power and space for the backup module; brief power interruptions (under 12 hours) won't drop your serial connection. ST fiber connectors require proper alignment and clean termination—standard single-mode fiber tools and discipline apply. Operating temperature range covers unconditioned out-of-plant and roadside environments, so sun-baked cabinets and unheated utility boxes are acceptable.
