WESDAC D20EME | GE Substation Controllers

D20 Chassis (single-slot, non-VME)The D20 chassis is a 3U horizontal slot chassis. The non-VME version of the D20 chassis is equipped with a rear-mounted termination board that provides power connection and serial port access to the D20 system. Non-VME versions of the D20 provide a single horizontal Eurocard slot, into which the D20ME board is installed. D20 Chassis (multiple-slot, VME)The VME version of the D20 chassis is equipped with five horizontal expansion slots for VME-compatible modules:The VME version of the D20 chassis is equipped with a rear-mounted termination board for power connections and serial ports for one processorboard. An optional rack-mounted serial port panel is available to support the seven serial ports on a second processor board.The D20 hardware consists of a rack-mountable chassis containing one or more processor boards, power supplies and modems.The D20 interfaces with substation equipment either through D.20 peripheral I/O modules, or directly through RS-232, RS-485, or Ethernet links.The D20 can support up to:• Two D.20 ports, each supporting up to 31 I/O peripherals, without repeaters, and• 120 I/O D.20 peripherals, with repeaters• 21 RS-232 or RS-485 ports (7 per processor board)• Two Ethernet channels