Alloy SCR460SC-4 Serial to Fibre Standalone/Rack Converter The SCR460ST-4, an SCR Series Media Converter, is used standalone or installed in a DCR12 Series Converter Chassis. This RS232/422/485 Serial to Fibre Converter has a Terminal Block port and a SC terminated singlemode fibre port, 20Km maximum range. Features: SCR460SC-4 Converter: RS-232/422/485 serial (Terminal Block) to serial over singlemode fibre (SC) - 20Km range SCR Series Converters for all types of serial over fibre media conversion - up to 20Km range DB-9 or Terminal Block options for copper serial cabling, ST or SC fibre connectors Triple mode circuit support for Plug-and-play RS-232triple mode circuit RS-232/RS-422/RS-485, RS-422 or RS-485 Auto baud rate (up to 460.8K) and Direction Control functions High EMI and EMS immunity Dual Purpose ACR Series - use 'standalone' or install in a DCR12 Series Media Converter Chassis Easy 'Slide-in, Hot Swap' installation into DCR12 Media Converter Chassis systems Compact, rugged all-metal case