D20/D200 Product Comparison - GE D20 Technical Overview

D20/D200 Technical Overview

1.3 D20/D200 Product Comparison

Table 2 summarizes the key differences between the D20 and the D200.
Maximum Processor
Boards
Maximum I/O Boards
VME Backplane
Maximum Serial Ports
Base Software
Applications Software
Typical Number of
Applications *
* Each D20/D200 application has specific memory and processing requirements. The number
of applications that can be supported is therefore system-specific, and this will be
determined during system engineering. If the applications you require are particularly
processor or memory-intensive, the number that can be supported may be less than that
shown in Table 2. Likewise, if the applications are not particularly processor or memory-
intensive, the number that can be supported may be higher than that shown. Contact GE
Grid Solutions for further information.
1.4 D20 RTU Platform
There are two types of D20 RTU masters:
• Single-slot (or non-VME) – One processor
• Five-slot VME – Up to three processors plus Ethernet
The D20 hardware consists of a rack-mountable chassis containing one or more processor
boards, power supplies and modems. As shown in Figure 4, the D20 interfaces with substation
equipment either through peripheral I/O modules, or directly through RS-232, RS-485, or
Ethernet links.
10
Table 2 D20/D200 Product Comparison
D20
1 - non-VME chassis
3 - VME chassis
31 (without repeaters)
120 (with repeaters)
Optional
7 + 1 Maintenance Port – Non-VME chassis
21 + 3 Maintenance Port – VME chassis
Standard D20 Base, CCU Base
Full suite of GE Grid Solutions automation
application software and protocols
5 - 7 *
PRPI-019-3.00-10
GE Grid Solutions
D200
7
124 (without repeaters)
480 (with repeaters)
Standard
49 + 7 maintenance ports
CCU Base
Full suite of GE Grid Solutions
automation application
software and protocols
5 - 7 per node *
GE Information