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Multilin D400

Advanced Substation Gateway

GE’s Multilin™ D400 is a secure, substation-hardened gateway that collects metering, status, event, and fault report data from serial or LAN based Intelligent substation devices. The D400 summarizes data from the substation devices and makes it available locally/remotely through a standard secure web browser (HTTPS).

It supports serial and/or LAN connections to SCADA masters. TCP/IP network connections are supported over the built-in Ethernet and the modem interface.

Key Benefits
  • Increase the operational and non-operational analog data management through Analog Report Generation capability
  • Increase the availability and reliability of data through the presence of a third Ethernet interface, hot-standby functionality and Parallel Redundancy Protocol (PRP), IEC 62439-3 Ed 2 scheme
  • Advanced security features including remote User Authentication, access control, and auditing to ensure compliance with NERC/CIP requirements
  • Full suite of SCADA protocols allow for direct communications with Master Stations
  • Secure pass through / terminal services allow personnel to access all substation devices, remotely
  • Direct support for industry standard communication protocols (including IEC 61850) ensures connectivity with new and legacy substation devices
  • Graphical configuration with drop downs and pre-configured device maps reduces setup and configuration time
  • Application flexibility with complete IEC 61131 SoftLogic Capabilities
  • Enable predictive maintenance with local or remote access to device status, annunciator, and data log
  • Substation hardened to relay standards for long service life in harsh substation environments
  • Advanced Gateway - Substation Data collection, concentration and visualization
  • Advanced Automation - Automate substation procedures using IEC 61131 compliant tools
  • Fault Recording & Data Logging - Extract valuable data such as digital fault records and event files
  • Secure Remote Access - Securely access substation device locally and remotely

Key Benefits
  • Secure web server (128 bit encryption)
  • Centralized user Authentication (Radius, TACACS+)
  • RBAC (Role Based Access control)
  • Full auditing including syslog
  • Secure access using SSH / SCP / HTTPS
  • IEC 61131 SoftLogic using LogicLinx
  • Built-in Calculator functions (math/logic)
  • Analog / digital data logging with Web based viewer and .CSV file export
  • Built-in alarm annunciator
  • Built-in one-line diagrams
  • Support for Network Time Protocol (NTP) and IRIG-B
  • Supports multiple, simultaneous SCADA protocols for communications to multiple masters
  • Event notification (e-mail, pager)
  • Built-in and isolated serial media converters
  • Download historical logs through removable media connected to the front USB port
  • Dual hot swappable power supplies
Advanced Gateway
The D400 collects data from substation protection, control, monitoring, RTU, and intelligent devices, pre-processes the data and moves it up to EMS and DMS SCADA systems providing centralized substation management.
Advanced Automation
The D400 provides the computing platform necessary to automate substation procedures, such that intricate processes are carried out safely and efficiently by creating custom automation programs using IEC 61131 compliant tools, and perform basic math functions on data points using the built-in Calculator tool.
Fault Recording/Data Logging
Using pass-through connections, users can extract valuable non-operational data such as digital fault recording (DFR) records and event files. The user can also access the historical log files and upload the archived data for trending and analysis.
Secure Remote Access
The D400 allows maintenance and relay engineers to securely access substation devices, locally or remotely, through advanced visualizations and communication tools, increasing productivity.
D400 Overview
  The D400 is built on a flexible, high performance, expandable diskless and fan-less platform that is powered by a 1.0Ghz processor.
Two Ethernet networks are supported with separate multiport switches. An IRIG-B format time protocol input/distribution module is also supported. Isolated serial port media is selected for each pair of ports.

Redundant power supplies
The D400 has dual redundant, hot swappable power supplies, ensuring continuous uptime. Each power supply can be connected to a different source. As an example Power supply 1 can be connected to Mains, while power supply 2 is connected to the battery system. Power Supply Health Monitoring raises a SCADA point alarm when either power supply fails. This allows an alarm to be transmitted to the EMS /OMS or DMS system, where a field personnel can be dispatched to replace the failed supply, all without service disruption.

Time Sync Support
The D400 has extensive support for various time sync methodologies and will accept time sync signals from SNTP/NTP Servers, IRIG-B (un-modulated/modulated), and SCADA protocols. The D400 can also distribute this time sync information through its built-in IRIG-B distribution interface, SCADA protocols, and/or through the RS232 ports directly.

  Advanced Gateway Connectivity
Data collection, concentration and visualization
The D400 Substation Data Manager, when operating as a SCADA host, collects, filters, and sorts data from a wide range of intelligent devices (RTUs, relays, meters) in the substation and preserves original data time stamp for accurate sequence of event. Data can be presented to multiple SCADA hosts. The D400 comes with a built-in suite of protocols and security applications to facilitate communication with various substation devices and SCADA hosts, including:
  • DNP3 serial and TCP/IP (client & server)
  • IEC 61850 (client)
  • Modbus serial & TCP/IP (client & server)
  • IEC60870-5-101/103/104 client
  • IEC60870-5-101/104 server
  • SELFast Meter/SEL ASCII
  • Hydran Host
  • GE modem
  • Generic ASCII protocols
    IEC 61850 Gateway
    The IEC 16850 Client application allows the D400 to act as a powerful IEC 61850 data concentrator. The D400 also includes valuable features such as Dynamic Data Sets, Buffered Control blocks, Enhanced Security controls.
    Device Redundancy (Hybrid Model)

    Dual D400 units can be deployed creating a redundant system where accumulators, SOE logs, and configurations are automatically synchronized between the two systems. Serial communication links are automatically switched between the units based on system health.

    The D400 100Base-FX redundant Ethernet card enables automatic switchover between two sets of Ethernet switches ensuring there is no single point of failure in the system.

    D400 now supports PRP by actively communicating on two physical Ethernet ports connected to two independent network LANs simultaneously. PRP allows systems to overcome any single network failure without affecting the data transmission. It provides seamless failover redundancy.

    The D400 supports three modes of operation:

    • Standalone
    • Warm standby and
    • Hot standby

    The D400 can be configured to operate in one mode at any given time.

    Built in Media Conversion
    The D400 supports various communication media types—Serial: RS-232, RS-485, Glass Fiber, and Plastic Fiber; and Ethernet: 10/100Base-T, 10Base-FL, and 100Base-FX. Hot swappable communications modules eliminate the need for dongle type media converters used to convert to glass or plastic fiber, reducing total cost of deployment.
    Advanced Automation
    The D400 acts as the centralized, rugged computing platform in advanced Automation systems. Using the calculator tool and/or GE’s programmable logic (LogicLinx), users can create custom automation programs for a variety of applications such as:
  • Sequence switching
  • Interlocking
  • Auto-sectionalizing
  • Auto-reclosing
  • Load Tap Changer Control
  • Capacitor Bank Control
  • Reactor Switching
  • Alarm grouping
    HMI, one-line viewer & Annunciator
    The D400 supports a web based HMI/Annunciator feature, that is accessible remotely, using a standard Internet browser or locally, through a direct connection to the unit. Users have access to all data points in the systems, alarm screens, communications status screens ,and dynamic One-Line diagrams, all through the secure web interface.
      Web based HMI/Annunciator feature, that is accessible using a standard Internet browser or through a VGA monitor and USB keyboard/mouse attached directly to the unit.
      Control Logic
      Using the Calculator tool, users can create advanced solutions that group, manage and control points to produce the required automation results. The calculator tool can perform mathematical, logical, or timer based operations on any data points stored in the D400. Using a graphical interface, users can define logical expressions using mathematical functions such as; addition, multiplication, logarithm, greater than, less than, as well as other boolean functions.
      Advanced Logic
      For more advanced applications, programmable logic (LogicLinx) software provides PLC functionality on the D400 platform. LogicLinx offers textual and graphical languages as defined in the IEC 61131-3 standard for PLC programming environments, including Sequential Functions Chart, Instruction List, Structured Text, Ladder Diagram and Function Block Diagram. In addition, a wide range of arithmetic, Boolean and logical operations are supported.
    Fault Recording/Data Logging

    Data Logger
    The Analog Data Logger provides a variety of means to monitor and record any analog input point value changes into data files that can be retrieved by the user. A variety of recording methodologies are supported including, Continuous (all changes), Periodic, Time weighted, Out of range and Triggered by a digital input point.

    Trend Viewer
    All data recorded by the Analog/Digital Data Logger can be viewed by the Digital event recorder using the built in web-based Trend Viewer. Users can select the range of data to be used by time and date, alternately a real time streaming view can be displayed. Up to 8 data points (pens) can be displayed on a single view and support for curve fitting is available.

    Data Base Exporter
    The Database Exporter tool allows users to save Analog Data Logger and Digital event recorder points from the D400 to your local PC, using the WEB interface, in comma-separated values (CSV) format.

    Fault Recording
      D400 fault Recording
      The D400 fault recording capability allows system event information to be collected and viewed using a web-based trend viewer.
      Parallel Redundancy Protocol

    Parallel Redundancy Protocol (PRP) is an IEC 62439-3 (clause 4) data communication network standard. It is often used to overcome single network failure without affecting the data transmission. PRP is independent of the communication protocols and provides seamless failover. Under PRP, each network node has two Ethernet ports attached to two different local area networks, but similar topology.

    Existing D400 systems with 1 GHz or newer CPU can be upgraded via firmware in order to enable the Parallel Redundancy Protocol. D400 can be enabled to communicate to a PRP device with or without a third network interface card.

    D400 Network Interface Options Used for PRP

    • 100 Base-FX Hot Standby Fiber Optic (used in Slot 11 or 12)
    • 4-Port Twisted-Pair Ethernet Switch (used in Slot 11 or 12)
    • COM 2 Dual TP (used only in Slot 12)
      Analog Report Generation
      In addition to the data logging capability within the D400, users can configure the D400 to record and generate online and offline reports from operational and non-operation analog data. While online reports can be retrieved instantly and are an extension of the data logger periodic reports, offline reports can be retrieved daily, weekly or monthly.

    Offline Reports:

    • Users can use the Analog report application to generate offline reports
    • Users can configure different types of analog reports. For example: Shift, daily, weekly and monthly
    • Users can use the offline report viewer to view generated reports
    • Output format types includes: PDF, Excel and HTML

    Online Reports:

    • This is an extension of the data logger periodic reports
    • Users can use the online report viewer to view periodic data logger reports
    • Output format types includes: PDF, Excel and HTML

    Report Configuration Steps:

    • Create report template using iReport Designer
    • Import template to D400
    • Configure Offline Reports

    Types of Offline Reports and Key Parameters:

      Secure Remote Access
      D400 provides robust security environment, providing seamless integration with existing IT department policies. Role based Access Control, Secure Web Interface, Secure File Transfer, and extensive user activity logging provide a complete security toolkit required to achieve NERC-CIP compliance.

    Non-operational Data
    Using pass-through connections, the utility user can extract valuable non-operational data such as digital fault recording (DFR) records and event files. The user can also access the historical log files and upload the archived data for trending and analysis.

    Pass-through/Terminal Server
    A built-in terminal server emulator allows pass-through connections to be initiated to substation device (relay, meter, RTU or other device). Once the connection is established, the local event records can be uploaded from the substation devices and viewed remotely.

    Virtual Serial Ports
    Virtual serial ports eliminate copper wire communications to feeder bays when a serial-only device is located in the bay. A small terminal server can be placed in the bay and connected to the Ethernet network, allowing all D400 serial client applications to connect directly to the serial device.

    Role Based Access Control
    Role Based Access Control is achieved using TACACS+, RADIUS or the D400’s internal database; ensuring only authenticated and authorized users gain access the system. When using TACACS+ or RADIUS, revoking user privileges, system wide, is as simple as updating the centralized user database.