GE D200 Technical Overview

Brand: GE

Model: D200

Category: Chassis components

Type: Technical Overview

This manual is also suitable for

Grid Solutions

D20/D200

Technical Overview

PRPI-019

Version 3.00 Revision 10

GE Information

D20/D200 Technical Overview

GE Grid Solutions

PRPI-019-3.00-10 GE Information

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iii

Contents

About this Document .....................................................................................................................1

Purpose ........................................................................................................................................ 1

Who Should Use this Document? ............................................................................................... 2

Additional Documentation .......................................................................................................... 2

Product Support .............................................................................................................................3

GE Grid Solutions Web Site ....................................................................................................... 3

GE Technical Support Library .................................................................................................... 3

Contact Technical Support .......................................................................................................... 3

What’s New.....................................................................................................................................4

D20ME II Main Processor .......................................................................................................... 4

D20EME (Ethernet/Memory Expansion) ................................................................................... 5

New D20/D200 I/O Peripherals .................................................................................................. 5

D20AC, AC Analog Input Peripheral ..................................................................................... 5

D20 High-Voltage Peripherals ................................................................................................ 6

D20K4Z Termination Module ................................................................................................ 6

New Power Supplies ................................................................................................................... 6

Multiple Language Support ........................................................................................................ 7

1. System Overview ........................................................................................................................8

1.1 System Architecture ............................................................................................................ 9

1.2 Hardware Design ................................................................................................................ 9

1.3 D20/D200 Product Comparison ........................................................................................ 10

1.4 D20 RTU Platform ............................................................................................................ 10

1.5 D200 Substation Automation Platform ............................................................................. 13

1.5.1 D200 Features .............................................................................................................. 13

1.6 D20/D200 RTU Hardware ................................................................................................ 16

1.6.1 Chassis ......................................................................................................................... 16

1.6.2 Main Processor ............................................................................................................. 17

1.6.3 Ethernet/Memory Expansion (EME) Kit ..................................................................... 19

1.6.4 Power Supplies ............................................................................................................. 19

1.6.5 Modems ........................................................................................................................ 20

1.7 I/O Peripherals .................................................................................................................. 20

1.8 Auxiliary Equipment ......................................................................................................... 21

1.9 Communications ............................................................................................................... 21

1.10 Firmware ........................................................................................................................... 22

1.11 Configuration and Maintenance Software ........................................................................ 22

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1.12 System Documentation ..................................................................................................... 22

2. Detailed Technical Description ...............................................................................................25

2.1 Mechanical Design and Packaging ................................................................................... 25

2.1.1 General ......................................................................................................................... 25

2.1.2 Enclosure ...................................................................................................................... 26

2.1.3 Chassis ......................................................................................................................... 26

2.1.4 Peripheral I/O Module Assembly ................................................................................ 28

2.1.5 Environmental .............................................................................................................. 29

2.2 Main Processor.................................................................................................................. 30

2.2.1 Hardware ...................................................................................................................... 30

2.2.2 D20/D200 Main Processor Specifications ................................................................... 31

2.2.3 Firmware ...................................................................................................................... 32

2.2.4 Time Synchronization .................................................................................................. 34

2.3 Ethernet/Memory Expansion (EME) Kit .......................................................................... 36

2.4 I/O Peripheral Modules ..................................................................................................... 37

2.4.1 Types of I/O Peripherals .............................................................................................. 37

2.4.2 Termination Types ....................................................................................................... 38

2.4.3 Hardware ...................................................................................................................... 40

2.4.4 Firmware ...................................................................................................................... 41

2.4.5 I/O Processing .............................................................................................................. 43

2.4.6 D20S Digital Input Peripheral ..................................................................................... 44

2.4.7 D20A Analog Input Peripheral .................................................................................... 48

2.4.8 D20K Control Output Peripheral ................................................................................. 53

2.4.9 Interposing Relay Panel ............................................................................................... 57

2.4.10 D20C Combination I/O Peripheral ............................................................................ 59

2.4.11 D20AC, AC Analog Input Peripheral ........................................................................ 62

2.5 D20/D200 Power Supplies and Chargers ......................................................................... 64

2.5.1 D20 Power Supply Specifications ............................................................................... 65

2.5.2 D20 Battery Chargers .................................................................................................. 66

2.6 D20 Modems ..................................................................................................................... 67

2.6.1 WESDAC 202/V.23 Modem Specifications ................................................................ 68

2.7 Communications ............................................................................................................... 69

2.8 D.20 Link .......................................................................................................................... 70

2.8.1 Designing a Distributed D20 Network......................................................................... 71

2.8.2 D.20 Communication Interface .................................................................................... 72

2.8.3 Adapter Modules .......................................................................................................... 73

2.8.4 D.20 Fiber Optic Splitter .............................................................................................. 73

2.8.5 Communication Cables ................................................................................................ 74

2.8.6 Power Requirements .................................................................................................... 75

2.9 Redundancy....................................................................................................................... 75

2.9.1 D20/D200 Redundancy ................................................................................................ 76

2.9.2 D.20 Link Redundancy ................................................................................................ 77

2.10 Auxiliary Equipment ......................................................................................................... 78

2.10.1 Universal Protocol Converter .................................................................................... 78

2.10.2 Data Display Panel ..................................................................................................... 79

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2.10.3 Fiber Optic Interfaces................................................................................................. 79

3. Configuration and Maintenance Software ............................................................................80

3.1 SGConfig .......................................................................................................................... 80

3.2 LogicLinx .......................................................................................................................... 80

3.3 WESMAINT ..................................................................................................................... 80

3.4 PROMAINT ...................................................................................................................... 81

3.5 68K Monitor...................................................................................................................... 81

4. Application Software ...............................................................................................................82

4.1 User Programmable Logic ................................................................................................ 82

4.2 Generation, Transmission, and Feeder Bay Automation Applications............................. 82

4.3 Distribution Automation Applications .............................................................................. 82

4.4 Communication Services Applications ............................................................................. 83

4.5 Data Logging / Storage Applications ................................................................................ 83

4.6 Data Reduction and Summarizing Applications ............................................................... 83

4.7 Data Conversion Applications .......................................................................................... 84

4.8 Other DTAs ....................................................................................................................... 84

5. Frequently Asked Questions ...................................................................................................85

5.1 What is the performance of the D20 and D200?............................................................... 85

5.2 What is the difference between the D20 and the D200? ................................................... 85

5.3 Will VME cards work with my non-VME systems? ........................................................ 85

5.4 What is the I/O capacity of a D20 system? ....................................................................... 86

5.5 What is the I/O capacity of a D200 system? ..................................................................... 86

5.6 What are the added features of the ME II Main Processor over the ME Main Processor?

A. Specifications and Supported Standards ..............................................................................87

B. Supported Host Protocols .......................................................................................................90

C. Supported IED Protocols........................................................................................................91

D. Power Consumption – D20 Modules .....................................................................................92

E. D20/D200 Main Processor Compatibility .............................................................................93

F. D.20 Link Installation .............................................................................................................94

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Figures

Figure 1 D20ME II Main Processor.............................................................................................. 4

Figure 2 D20EME (Ethernet/Memory Expansion) ....................................................................... 5

Figure 3 GE Integrated Substation Control System ...................................................................... 8

Figure 4 D20 System Architecture ............................................................................................. 11

Figure 5 Example D20 Rack Layout .......................................................................................... 12

Figure 6 D200 Substation Automation Platform ........................................................................ 13

Figure 7 D200 System Architecture ........................................................................................... 14

Figure 8 Example D200 Rack Layout ........................................................................................ 15

Figure 9 D20 Perspective Drawing ............................................................................................. 16

Figure 10 D200 Perspective Drawing ......................................................................................... 17

Figure 11 D20ME II Main Processor.......................................................................................... 18

Figure 12 D20EME (Ethernet/Memory Expansion) ................................................................... 19

Figure 13 D20/D200 Chassis Mounted Power Supplies............................................................. 19

Figure 14 D20A I/O Peripheral................................................................................................... 20

Figure 15 D20 Chassis (non-VME version) ............................................................................... 27

Figure 16 D20 Chassis (VME version) ....................................................................................... 27

Figure 17 D200 Chassis .............................................................................................................. 28

Figure 18 D20 Peripheral I/O Module ........................................................................................ 29

Figure 19 D20ME Block Diagram .............................................................................................. 30

Figure 20 D20/D200 Time Synchronization............................................................................... 35

Figure 21 Demodulated IRIG B Signal ...................................................................................... 35

Figure 22 D20EME (Ethernet/Memory Expansion) ................................................................... 36

Figure 23 D20 I/O Peripheral - Compression Termination ........................................................ 38

Figure 24 D20 I/O Peripheral – DB25 Termination ................................................................... 38

Figure 25 D20 I/O Peripheral – Disconnect Termination ........................................................... 39

Figure 26 D20 I/O Peripheral – Barrier Termination ................................................................. 39

Figure 27 D20 Peripheral I/O Block Diagram ............................................................................ 40

Figure 28 D20S Digital Input Peripheral .................................................................................... 44

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Figure 29 D20S Digital Input Peripheral Block Diagram .......................................................... 45

Figure 30 D20A Analog Input Peripheral ................................................................................... 48

Figure 31 D20A Analog Input Peripheral Block Diagram ......................................................... 49

Figure 32 Analog Conversion Process ........................................................................................ 49

Figure 33 Three-point Linearity Correction ............................................................................... 51

Figure 34 D20K Control Output Peripheral................................................................................ 53

Figure 35 Interposing Relays ...................................................................................................... 58

Figure 36 D20 Power Supply ...................................................................................................... 64

Figure 37 D200 Power Supplies ................................................................................................. 65

Figure 38 D.20 Link Example Configuration ............................................................................. 71

Figure 39 D.20 Communications Interface ................................................................................. 72

Figure 40 D.20 Communication Interface .................................................................................. 72

Figure 41 DCI Modes of Operation ............................................................................................ 73

Figure 42 D.20 Fiber Optic Splitter ............................................................................................ 73

Figure 43 D.20 Fiber Optic Splitter ............................................................................................ 74

Figure 44 D200 Redundancy ...................................................................................................... 76

Figure 45 Single D20/D200 with Loop Redundancy ................................................................. 77

Figure 46 Single D20/D200 with Redundant LAN .................................................................... 78

Figure 47 Data Display Panel ..................................................................................................... 79

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Tables

Table 1 D20/D200 Power Supply Replacements.......................................................................... 6

Table 2 D20/D200 Product Comparison...................................................................................... 10

Table 3 D20/D200 Power Supplies............................................................................................. 20

Table 4 D20/D200 Main Processor Specifications ..................................................................... 31

Table 5 D20/D200 Ethernet Media Types .................................................................................. 36

Table 6 D20/D200 I/O Peripherals ............................................................................................. 37

Table 7 I/O Processing ................................................................................................................. 43

Table 8 D20S Specifications ....................................................................................................... 47

Table 9 D20S Options ................................................................................................................. 47

Table 10 D20A Specifications .................................................................................................... 52

Table 11 D20A Options .............................................................................................................. 53

Table 12 D20K Specifications .................................................................................................... 56

Table 13 D20K Options .............................................................................................................. 57

Table 14 D20KI Options ............................................................................................................. 58

Table 15 D20C Daughter Boards ................................................................................................ 59

Table 16 D20C Specifications .................................................................................................... 60

Table 17 D20C Options .............................................................................................................. 61

Table 18 D20AC Features and Specifications ............................................................................ 62

Table 19 D20AC Options ........................................................................................................... 63

Table 20 D20/D200 Power Supplies........................................................................................... 65

Table 21 D20/D200 Battery Chargers ........................................................................................ 66

Table 22 D20/D200 Modems...................................................................................................... 67

Table 23 WESDAC 202/V.23 Modem Specifications ............................................................... 68

Table 24 D20/D200 Communications Links .............................................................................. 69

Table 25 D20/D200 Fiber Optic Links ....................................................................................... 79

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About this Document

Purpose

This document provides a technical overview of the D20/D200 Remote Terminal Unit (RTU).

The document is organized as follows:

• What’s New: This section highlights recent additions and enhancements that have been

made to the D20/D200 product line.

• 1. System Overview: This section provides an overview of the D20/D200 system hardware

and software.

• 2. Detailed Technical Description: This section provides a detailed description of the

D20/D200 hardware, software and operation.

• 3. Configuration and Maintenance Software: This section describes utilities and

applications that are available to help you configure, manage and maintain your D20/D200

system.

• 4. Application Software: This section describes some of the substation automation and

SCADA applications that are available for the D20/D200.

• 5. Frequently Asked Questions: This appendix presents answers to frequently asked

questions about the D20/D200.

• A. Specifications and Supported Standards: This appendix lists key industry

specifications with which the D20/D200 complies.

• B. Supported Host Protocols: This appendix lists SCADA host protocols supported by the

D20/D200.

• C. Supported IED Protocols: This appendix lists IED protocols supported by the

D20/D200.

• D. Power Consumption – D20 Modules This appendix lists nominal power consumption

for D20 components, for use in power calculations.

• E. D20/D200 Main Processor Compatibility: This appendix shows the compatibility of

D20 processors with the D20/D200 chassis.

• F. D.20 Link Installation: This appendix provides guidelines on planning and installing a

D.20 Link.

D20/D200 Technical Overview

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Who Should Use this Document?

This document is a helpful resource for utility customers or GE partners who are purchasing or

evaluating a remote terminal unit or substation control system. It is intended for readers who

have knowledge of substation automation equipment and applications.

Additional Documentation

For further information about the D20/D200 product family, refer to the following documents:

• D20/D200 Installation and Operation Guide (994-0078)

• D20, D25, iBOX Automation Applications (PRPI-048)

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D20/D200 Technical Overview

GE Information PRPI-019-3.00-10

Product Support

If you need help with any aspect of your GE Grid Solutions product, you can:

• Access the GE Grid Solutions Web site

• Search the GE Grid Solutions Technical Support library

• Contact GE Grid Solutions Technical Support

GE Grid Solutions Web Site

The GE Grid Solutions Web site provides fast access to technical information, such as manuals, release

notes and knowledge base topics.

Visit us on the Web at: http://www.gegridsolutions.com

GE Technical Support Library

This site serves as a document repository for post-sales requests. To get access to the Technical Support

Web site, go to:

http://sc.ge.com/*SASTechSupport

Contact Technical Support

The GE Grid Solutions Technical Support is open 24 hours a day, seven days a week for you to

talk directly to a GE representative.

In the U.S. and Canada, call toll-free: 1 800 547 8629

International customers, please call: +1 905 927 7070

or email to multilin.tech@ge.com

Have the following information ready to give to Customer Service:

• Ship to address (the address that the product is to be returned to)

• Bill to address (the address that the invoice is to be sent to)

• Contact name

• Contact phone number

• Contact fax number

• Contact e-mail address

• Product number / serial number

• Description of problem

The Technical Support centre will provide you with a case number for your reference.

D20/D200 Technical Overview

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What’s New

GE Grid Solutions is pleased to announce the following additions to the D20/D200 product

family:

D20ME II Main Processor

The D20ME II, the fifth generation of D20/D200 processors, builds on the increased memory,

performance and communication port speed introduced with the D20ME. Where the D20ME

supports up to eight RS-232 serial ports (one of which is reserved for the maintenance port), the

D20ME II supports:

• Seven serial ports, each of which can be configured as either RS-485 or RS-232, and

• One RS-232 maintenance port.

Each D20ME II RS-485 port can communicate with up to 32 devices and operate over distances up

to 4000 feet, without the use of repeaters (see note below). The D20ME II is backwards compatible

with VME and non-VME versions of the D20 chassis, and with the D200 chassis. For more

information, see section 2.2, Main Processor.

Figure 1 D20ME II Main Processor

Note: The RS-485 port on the D20ME II provides no isolation and offers limited built-in

transient suppression. If you are using the D20ME II in an environment where longer cable runs

with larger transients are expected, installation of an external transient suppression device is

recommended to protect the RTU. In addition, GE recommends the installation of an external

transient suppression device when the RS-485 communication cable must be run to devices

located outside of the RTU cabinet containing the D20ME II. Contact Customer Service for

additional information.

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D20/D200 Technical Overview

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D20EME (Ethernet/Memory Expansion)

The D20EME is a VME-based module that combines Ethernet support and global memory

expansion.

Figure 2 D20EME (Ethernet/Memory Expansion)

The D20EME allows VME-based D20 and D200 systems to be connected directly to any 10

Ethernet-based network. Available configurations of the D20EME module include:

• Ethernet only

• Memory only

• Ethernet and Memory

For more information, see section 2.3, Ethernet/Memory Expansion (EME) Kit.

New D20/D200 I/O Peripherals

Several new I/O peripherals have been added to the D20/D200 product family.

D20AC, AC Analog Input Peripheral

The D20AC, AC analog input peripheral provides AC analog computing and monitoring. It has

the following features:

• Up to 132 analog values and 18 accumulator values

• Direct AC analog inputs from current and voltage transformers for up to three 3-phase

circuits, eliminating the need for transducers and/or metering IEDs

• Integrated key substation functions such as metering, analog processing and power quality

measurement

• 3-element and 1-element (balanced system) metering

• Meter calculations include kW, kVArs, kVA, power factor, frequency, kWh, kVARh, kVAh

and symmetrical components.

• Power quality data: %THD (total harmonic distortion), 21st harmonic

For more information, see section 2.4.11 , D20AC, AC Analog Input Peripheral.

D20/D200 Technical Overview

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D20 High-Voltage Peripherals

D20 high-voltage peripherals provide an extra level of protection for your system. They are

packaged similar to the standard D20 I/O peripherals, but the input and output circuits are

conditioned to handle higher voltages. For instance, the high-voltage version of the D20S, the

D20

SZ, supports ON thresholds of up to 220 VDC. For more information, see section 2.4, I/O

Peripheral.

D20K4Z Termination Module

The WESTERM D20K4Z is the termination panel for the D20K4Z high-voltage control output

module. As well as providing outputs that can withstand higher voltages, all of the control relays

on the D20K4Z termination module are 4-pole, momentary contact, so that both sides of an

interposer coil can be switched for additional control security. For more information, see section

2.4, I/O Peripheral.

New Power Supplies

GE Grid Solutions has introduced several new D20/D200 power supplies that provide additional

capacity and improved standards compliance. The new power supplies are designed to be drop-in

replacements for the existing D20 power supplies. As shown in the following tables, each of the

existing power supplies has two possible replacements, one with a 24

V isolated output, and one

with a 48

V isolated output. For more information, see section 2.5, D20/D200 Power Supplies

and Chargers.

Table 1 D20/D200 Power Supply Replacements

Supply Phased Out Drop In Replacement Alternative

Replacement

Part Number 580-0240 580-2006 580-2007

Input Voltage Range 90-135 VAC 100-300 VDC or

85-264 VAC 100-300 VDC or

85-264 VAC

+5 V Current 5 A 7 A 7 A

+12 V Current 1 A 2 A 2 A

-12 V Current ½ A 1 A 1 A

ISO V/I 24 V/3 A 24 V/3 A 48 V/1½ A

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D20/D200 Technical Overview

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Supply Phased Out Drop In Replacement Alternative

Replacement

Part Number 580-0241 580-2006 580-2007

Input Voltage Range 100-150 VDC 100-300 VDC or

85-264 VAC 100-300 VDC or

85-264 VAC

+5 V Current 5 A 7 A 7 A

+12 V Current 1 A 2 A 2 A

-12 V Current ½ A 1 A 1 A

ISO V/I 24 V/½ A 24 V/3 A 48 V/1½ A

Supply Phased Out

Drop In

Replacement Alternative

Replacement

Part Number 580-0296 580-2004 580-2005

Input Voltage

Range 20-60 VDC 20-60 VDC 20-60 VDC

+5 V Current 5 A 7 A 7 A

+12 V Current 1 A 2 A 2 A

-12 V Current ½ A 1 A 1 A

ISO V/I 24 V/½ A 24 V/3 A 48 V/1½ A

Supply Phased Out

Drop In

Replacement Alternative

Replacement

Part Number 580-0297 580-2007 580-2006

Input Voltage

Range 100–300 VDC or

90–265 VAC 100-300 VDC or

85-264 VAC 100-300 VDC or

85-264 VAC

+5 V Current 5 A 7 A 7 A

+12 V Current 1 A 2 A 2 A

-12 V Current ½ A 1 A 1 A

ISO V/I 48 V/1½ A 48 V/1½ A 24 V/3 A

Multiple Language Support

To meet the needs of our international customers, GE Grid Solutions has added multiple

language support to many of our software products that complement the D20/D200, including

PowerLink, SGConfig and WESMAINT. These products can be supplied in other languages by

request so that end users, such as system operators, can work efficiently in their native language.

Contact GE Grid Solutions for details.

D20/D200 Technical Overview

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1. System Overview

This section provides an overview of the D20/D200 system hardware and software. More

detailed technical information can be found in 2. Detailed Technical Description.

The D20/D200 is the heart of GE Grid Solutions’s iSCS (Integrated Substation Control System),

as illustrated in Figure 3.

Figure 3 GE Integrated Substation Control System

The D20/D200 provides substation server functionality in a mission-critical, substation-hardened

package. The D20/D200 has a distributed architecture for gathering data from, and controlling,

substation equipment.

The D20/D200 is available with a broad range of:

• SCADA host protocols (see C. Supported Host Protocols)

• IED protocols (see D. Supported IED Protocols)

• Communication options (see section 2.7, Communications)

• Input/output (I/O) peripheral modules (see section 2.4, I/O Peripheral)

• Operation and maintenance utilities (see 3. Configuration and Maintenance Software)

• Substation automation applications (see 4. Application Software)

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D20/D200 Technical Overview

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1.1 System Architecture

The D20/D200 is based on a distributed processing architecture that consists of one or more

main processors, peripheral I/O modules, termination panels, power supplies and

communications equipment.

The main components of a D20/D200 system are:

• D20/D200 main chassis, equipped with processor(s), power supply, RS-232/485 ports

• Input/output peripheral modules

• Auxiliary equipment

• Communications interfaces

• Application firmware

• Configuration and maintenance software

• User manuals

The main processor communicates with I/O peripherals over proprietary high-speed D.20

communications links. General-purpose RS-232 and RS-485 serial ports provide

communications with a variety of external devices, including substation equipment (IEDs, for

example), local printers, operator terminals, and SCADA computers.

Field data acquired by the D20/D200 is maintained in the system database, where it can be

accessed and processed by different application programs.

1.2 Hardware Design

The D20 and D200 hardware designs are based on:

• Distributed processing architecture which permits the sharing of I/O data processing between

the main processor and I/O peripheral processors

• CMOS logic devices for low power consumption, noise immunity and high reliability

• Advanced 32-bit Freescale™ 68030 (D20ME and ME

II) and 68HC11 (D20 I/O peripherals)

single-chip microcontrollers

• Programmable logic devices (PLD) to provide flexibility and reliability, and to reduce the

physical space taken up by logic circuits

• 9600-baud maintenance port

• D.20 HDLC link over a shielded cable or a glass/plastic fiber optic cable

The modular design of the D20/D200 allows for easy expansion when you need additional

processing power or communication ports.

D20/D200 Technical Overview

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1.3 D20/D200 Product Comparison

Table 2 summarizes the key differences between the D20 and the D200.

Table 2 D20/D200 Product Comparison

D20 D200

Maximum Processor

Boards 1 - non-VME chassis

3 - VME chassis 7

Maximum I/O Boards 31 (without repeaters)

120 (with repeaters)

124 (without repeaters)

480 (with repeaters)

VME Backplane Optional Standard

Maximum Serial Ports 7 + 1 Maintenance Port – Non-VME chassis

21 + 3 Maintenance Port – VME chassis

49 + 7 maintenance ports

Base Software Standard D20 Base, CCU Base CCU Base

Applications Software Full suite of GE Grid Solutions automation

application software and protocols Full suite of GE Grid Solutions

automation application

software and protocols

Typical Number of

Applications * 5 - 7 * 5 - 7 per node *

* 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.

GE Grid Solutions

D20/D200 Technical Overview

GE Information PRPI-019-3.00-10

The D20 can support up to:

• Two D.20 ports, each supporting up to 31 I/O peripherals, without repeaters, and 120 I/O

peripherals, with repeaters

• 21 RS-232 or RS-485 ports (7 per processor board)

• Two Ethernet channels

Figure 4 D20 System Architecture

D20/D200 Technical Overview

GE Grid Solutions

PRPI-019-3.00-10 GE Information

An example of a D20 rack layout is shown in Figure 5.

Optional second 7 COM port

panel

UPC

WESDAC D20A

WESTERM D20A

DUCT PANEL

WESDAC D20S

WESTERM D20S

DUCT PANEL

WESDAC D20K

WESTERM D20K

DUCT PANEL

D20 CHASSIS

(with 7 COM ports)

Figure 5 Example D20 Rack Layout

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GE D200 Technical Overview

Brand: GE

Model: D200

Category: Chassis components

Type: Technical Overview

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GE D200 Technical Overview

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