D20/D200 Rtu Hardware - GE D20 Technical Overview

D20/D200 Technical Overview
GE Grid Solutions

1.6 D20/D200 RTU Hardware

1.6.1 Chassis
The D20 and D200 chassis feature a VME/Eurocard design for mounting plug-in D20 modules:
• Main Processor
• Power Supplies
• Modems
• Ethernet/Memory Expansion Module
• Media Interface Card
For convenience, maintenance ports, test points, indicators and power switches are brought out to
the front of the chassis. With VME versions of the D20 and D200 chassis, external connections
are provided through rear-mounted termination panels.
1.6.1.1 D20 Chassis
D20EME Ethernet
Memory Expansion
Module Power Supply
5.25
in
8.5 in
19.0 in
D20ME or D20ME II
Main Processor (up to 2)
Modem
Media Interface
Cards
Figure 9 D20 Perspective Drawing
The D20 chassis is available in a single-slot Eurocard version, or a five-slot VME version. The
single-slot chassis provides one horizontal double-size Eurocard slot for mounting the D20
processor card. It is equipped with an integral D20 termination board for customer power and
field connection, and for serial-port access.
The VME chassis is equipped with five horizontal expansion slots for use with VME compatible
printed circuit boards. A separate termination board is required with the full VME chassis. The
VME D20 chassis can support up to:
• Three D20 processor cards
• Two D.20 ports, each supporting up to 31 peripherals without repeaters or 120 I/O
peripherals with repeaters
• Twenty-one RS232 or RS-485 ports (seven per main processor)
• Two Ethernet ports
PRPI-019-3.00-10 GE Information
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