Manufacturing for the D20MX portfolio has been discontinued. Please contact GE for availability. As an alternative, please refer to the G100 or G500.
The Multilin™ D20MX Substation Controller is designed to execute communications and energy management applications for the monitoring and control of electrical substations. It is capable of amalgamating data from multiple slave devices and D20 I/O modules connected via communication channels into a single database using various protocols.
The D20MX represents the next innovation in GE’s cyber secure RTU technology for NERC-CIP environments. The D20MX is built upon the field-proven Multilin D20 technologies and continues the tradition of reliable automation and control through high quality and long term product availability.
Key Benefits
Supports multiple partitions which eases the upgrade of D200 multi-processor configurations
Reduces legacy D20/D200 RTU upgrade expenditures by over 50% through backwards compatibility with existing D20/D200 installed accessories, such as chassis, modems and D20 I/O peripheral modules
Minimizes operation and maintenance costs of existing D20/D200-based SCADA infrastructure by leveraging existing designs, processes and infrastructure
Enables simpler and more efficient compliance with NERC-CIP requirements through the application of native cyber security features built into the D20MX Substation Controller
Advanced Controller
The Multilin D20MX Substation Controller collects, filters, and sorts data from a wide range of intelligent devices (RTUs, relays, meters) in the substation. The D20MX preserves original data time stamps for accurate sequence of event (SOE) logs, allowing data from large diverse geographic regions and time zones to be analyzed in extreme detail. Data can be presented simultaneously to multiple SCADA hosts. The D20MX comes with a built-in suite of protocols and security applications to facilitate integration with various substation devices and SCADA hosts.
D20MX is the sixth generation of D20 CPUs designed to provide a smooth migration path for D20 users to extend the life of aging D20 systems. It introduces a new and modern network security feature suite that enables effective compliance with NERC-CIP requirements, using open and trusted standards and protocols that allow integration with modern cyber security systems and tools.
Advanced Substation Controller Connectivity
D20MX Upgrade Process
The Multilin D20MX provides a cost-effective alternative to upgrades of legacy D20/D200 RTUs. This means that the investments made in GE’s automation systems keep paying dividends beyond their originally projected end of life. Simply replace the Multilin D20/D200 processor module with a Multilin D20MX and migrate the device configuration to extend the life of the existing D20/D200 Controller. Add cyber security features for integration into NERC-CIP environments. As technology changes with market demands, GE continues to invest in a partnership with their customers through advanced modular design principals
Integration into NERC-CIP Environments
The Multilin D20MX supports a comprehensive set of security functions to allow a seamless integration with existing IT department policies. Built-in cyber security features, such as Remote Authentication Dial-In User Service (RADIUS), Role Based Access Control (RBAC), and user activity logging, provide a complete security toolkit required to enable simpler and more efficient compliance with NERC-CIP requirements, using open and trusted standards and protocols, that allow integration with modern cyber security systems and tools.
Centralized Authentication and Authorization
Hardware Overview
Backwards Compatibility with Earlier Vintages of Multilin D20 RTUs
The Multilin D20MX is an embedded single board computer powered by a 667 MHz PowerQUICC II Pro processor pin-for-pin compatible unit with existing D20 Processors and accessories, such as chassis, D20 remote I/O peripherals, modems.
Fully Equipped Out-of-the-Box
Previous generations of D20/D200 RTUs required add-on system components and software to support Ethernet communications and optional memory expansion. The new D20MX is equipped by default with integrated memory, 10/100/1000BASE-TX or 100BASE-FX IEEE 802.3 compliant communications and a core load firmware with a comprehensive set of key substation automation applications.
D20 I/O options
A complete family of substation hardened I/O modules makes the D20MX controller scalable to both large and small substations. A distributed architecture with both ring and star topologies allows for easy expandability and remote placement of I/O modules. The following I/O modules are available in a variety of models with I/O ranges up to 300VDC.
Buy Now D20KI - 8 external interposer relay pairs module
Buy Now D20C - 16 status input, 8 control output, optional 16 DC analog inputs or 8 analog inputs and 8 analog outputs
I/O with DNP Communication
The DNP I/O modules are data collection and control devices that combine the DNP 3.0 communications protocol with our existing industry proven and robust line of I/O modules. The DNP I/O modules implement the industry standard DNP 3.0 (Level 2) slave protocol over a single RS485 interface to provide expandable I/O functionality for the D400, D25 and iBox product lines, as well as third-party products.
The following DNP I/O modules are available:
Substation Automation 
