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Industry dynamics

GE Memory Board D20EME

The Multilin D20/D200 Substation Controllers offer an industry leading design embedded with high value substation automation applications that provide cost savings, increased reliability, and improved operational efficiencies in electric power substations. The ability to support a wide range of communication protocols and applications, allows the D20 to be interoperable with a broad range of intelligent electronic slave and master devices. The D20 can execute simple to complex local logic, compile and process data [collect and convert] and reports upstream to master stations. The D20’s distributed, expandable I/O architecture and mission-critical automation control applications reinforce why the D20 controller is being used in over 40,000 installations around the world.

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Key Benefits

In a mission-critical substation-hardened package, the D20/D200 provides:

• Substation client and server functionalities by maintaining a distributed architecture for gathering and controlling data on substation equipment while sending data to master stations via serial RS-232,RS-485, fibre optic or Ethernet interfaces for point to point, multi-drop and remote connections.

• Support for a broad range of SCADA host protocols, IED protocols, Communication options, Input/output (I/O) peripheral modules, and operation and maintenance utilities substation automation applications.

Refer to the hardware manual and see the appendix section of this document for more details.

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Multilin D20/D200 Data Translation Applications  User Programmable Logic: 

• LogicLinx™ module: IEC61131-3 compliant PLC-type logic with full  support for 5 programming languages 

• Calculator module: Soft logic utility to perform mathematical and logical operations  Generation, Transmission, and Feeder Bay Automation 

Applications: 

• Automatic Voltage Control module: Maintains steady voltage base on user-defined targets and settings 

• Local / Remote Data Translation module: A master local/remote switch to control the local/remote state of distributed devices 

• Secondary Master Trip/Close module: Enables the use of individual relays (with external terminations) as master trip/close relays 

• Set-point Adjustment module: Adjust set points based on control requestdurations or analog input values 

• Tap Position Indication module: Translates status points into scaled analog input values to reflect transformer tap positions

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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.

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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 processor board. 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

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D200 Chassis (multiple-slot, VME]

The D200 chassis is equipped with a rear-mounted termination board for power connections and serial-port access.

The D200 has the computing power and expandability needed to provide substation automation in larger substations. This is achieved through an innovative design that employs multiple D20 processors, communicating

over a VME bus:

• RS-232/RS-485 ports support large numbers of host systems and IEDs

• VME bus architecture provides high scalability and performance for adding serial ports, LAN options, and memory

• Data is integrated and coordinated, so different applications access a single, real-time database

• Optional redundant configuration for high reliability at critical sites

• ironment, in accordance with applicable IEEE® and IEC® standards D200 hardware is similar in design to the D20 hardware, but it has significantly more physical capacity. Based on a 9-slot VME chassis, the D200 illustrated in figure 4 can support up to:

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

• 49 RS-232 or RS-485 ports (seven per D20ME or D20ME II Main Processor)

• Two Ethernet channels



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