CHAPTER 1: BEFORE YOU START
D20MX INSTRUCTION MANUAL GE INFORMATION 29
Product specifications
The D20MX adheres to the following system, communications, electrical, physical and
environmental specifications. Additional Standards and Protection are listed in Appendix A,
Standards & Protection.
System
Communications
Electrical
Processor 667 MHz embedded PowerQUICC II Pro
Memory 1024 MB of 266 MHz DDR2 RAM with ECC
16 MB NVRAM for persistent event storage
Storage 8 MB boot flash
256 MB firmware flash
Operating system VxWorks
LED indicators System status: Power, Ready
Ethernet port status: Link and Activity status per port
Power supply: Power
IRIG: Flashes when active.
Network connections Dual redundant Ethernet interface
Twisted Pair
10/100/1000BaseT (Isolated RJ-45 connector)
100BaseFX (Fiber Optic: 1300 nm, 50/125 µm, 62.5/125 µm multi-mode
duplex fiber cable, ST connectors)
Serial communications D.20 Link, 2 channels
Data rate: 250 kbps
Surge protected to ±2000 V peak
RS-232, 7 channels
5-signal (TXD, RXD, RTS#, CTS#, DCD#) DTE ports
Data rate: independently-selectable; refer to the application configuration
guides.
Maintenance Port RS-232, 1 channel/ 2 ports
2-signal (TXD, RXD)
Data rate: 9600 (or 19200 bps)
Rated power supplies AC-DC 100 to 240 V AC (±10%) 143 W output maximum
Minimum/Maximum AC voltage: 90 V AC / 265 V AC
100 to 300 V DC (±10%) 143 W output maximum
Minimum/Maximum DC voltage: 88 V DC / 330 V DC
DC-DC 20 to 55 V DC (±10%) 135 W maximum
Minimum/Maximum DC voltage: 18 V DC / 60 V DC
Peak inrush current at
25 °C on cold start
AC-DC 50 A, max at 230 V AC
DC-DC 50 A, max at 230 V AC
Rated frequency
(AC-DC)
50/60 Hz nominal (47 to 63 Hz)
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