DS2020CMB1206CGDDD8E - PLC Module Rack Chassis

SPECIFICATIONS:

Part No: DS2020CMB1206CGDDD8E
Manufacturer: General Electric
Product Type: PLC Module Rack Chassis
Series: LS2100 Innovation Series
Exciter Connector Type: 34
Number of VME Connectors: 8
Terminal Block: 12
Power Supplies: 240 Vdc
Rack Type: Modular / Fixed / Remote
Number of Slots: 4 / 8 / 16 / 32
Backplane Type: High-density PCB with bus architecture
Power Supply Voltage: 24V DC
Mounting Type: DIN rail
Isolation Voltage: 1500 VAC
Operating Temperature: 0°C to 65°C
Availability: In Stock
Weight: 2.00 lbs
Size: 9.2 x 6.5 inches
Country of Origin: USA

FUNCTIONAL DESCRIPTION:

DS2020CMB1206CGDDD8E is a PLC Module Rack Chassis manufactured and designed by General Electric and is part of the LS2100 Innovation Series used in Static Starter Control systems. A PLC rack serves as the physical and electrical backbone of a programmable logic controller system, providing a structured platform that houses, powers, and connects essential modules such as the CPU, I/O cards, power supply, and communication interfaces. By ensuring reliable signal flow and organized module integration, the rack supports efficient system operation, scalability, and ease of maintenance. Whether used in simple automation setups or complex industrial environments, a well-designed PLC rack helps maximize uptime, simplify troubleshooting, and enable flexible expansion to meet evolving automation needs.

A PLC rack is a modular framework designed to hold and interconnect the key components of a programmable logic controller (PLC) system. It provides solid mechanical support and dependable electrical connections for the CPU, I/O modules, communication cards, and power supplies. Each module plugs into a slot on a shared backplane, which distributes power and enables seamless data communication. This rack architecture ensures efficient system operation by synchronizing power and signal flow, while also allowing easy expansion or module replacement. PLC racks are used across a wide range of applications, from small machines to large industrial processes in manufacturing, energy, and utilities.

KEY COMPONENTS OF A PLC RACK:

Backplane: The backplane is a high-density PCB that forms the electrical core of the PLC rack. It provides the pathways needed for both power and data communication between all installed modules. The backplane’s bus architecture allows multiple modules to communicate simultaneously, reducing latency and ensuring that control signals are delivered precisely when required. This timing accuracy is essential for real-time automation systems to operate quickly and reliably.

CPU Module: The CPU module acts as the brain of the PLC system. It executes control programs (such as ladder logic or structured text) stored in non-volatile memory. Powered by a microprocessor or microcontroller, the CPU handles task scheduling, I/O scanning, communication management, and system diagnostics. Modern CPU modules often include advanced features like real-time clocks, high-speed counters, and motion control functions to support complex automation tasks.

I/O Modules: I/O modules link the PLC to external devices by processing input signals from sensors and sending output commands to actuators. They also provide signal conditioning and electrical isolation, ensuring stable and safe communication between the PLC and field equipment.

Input Modules: Convert sensor signals into readable data for the CPU. Digital inputs manage on/off signals, while analog inputs handle variable signals such as temperature or pressure.

Output Modules: Send control commands to external devices. Digital outputs switch devices on or off, and analog outputs deliver variable control for equipment like drives or valves.

TYPES OF PLC RACKS:

Fixed (Integrated) Racks: Fixed racks come as a single, compact unit with all PLC modules built into the enclosure. This design is best suited for small systems where expansion is not needed. Installation is simple, but flexibility is limited because modules cannot be easily changed or upgraded.

Modular Racks: Modular racks allow modules to be added, removed, or replaced independently. This makes them highly scalable and adaptable, ideal for systems that may expand or require customization over time. They are widely used in industrial applications due to their flexibility.

Remote Racks: Remote racks are located away from the main PLC unit and connected through communication networks like Ethernet or fieldbus systems. This configuration is useful for large facilities with distributed control points, as it reduces wiring complexity and enables local control at distant locations.

Chassis-Mounted Racks: Chassis-mounted racks are installed directly inside control panels or cabinets. This setup saves space and protects PLC components in a controlled environment. It is commonly used in industrial settings where compact, organized, and secure installation is required.

WOC maintains the largest inventory of replacement parts for GE Innovation Series control systems, offering a full range of solutions, including unused, warranty-backed boards, professionally rebuilt modules, and expert repair services for damaged components. Our skilled team is available 24/7 to support OEM requirements, provide technical guidance, and ensure fast turnaround times to minimize downtime. Whether you need pricing, availability, or urgent repairs, WOC is committed to delivering reliable automation support and customized solutions. Please contact us by phone or email for assistance with any components or repair needs.

FREQUENTLY ASKED QUESTIONS:

What is a PLC module rack chassis?

A PLC module rack chassis is the frame that holds and connects all PLC modules, such as the CPU, I/O, power supply, and communication cards. It provides the electrical pathways and mechanical support needed for the system. The backplane inside the chassis enables power distribution and data communication between modules.

Why is the rack chassis important in a PLC system?

The rack chassis keeps all PLC components organized in a compact structure, allowing them to work as a unified system. It ensures reliable power and communication across modules. It also makes maintenance and expansion easier by allowing modules to be swapped or added.

What is a backplane?

The backplane is a circuit board inside the chassis that connects all the modules electrically. It distributes power to each module and enables communication between the CPU and other cards. It is the main communication backbone of the PLC system.

What components are installed in a PLC rack chassis?

Typical components include the CPU module, I/O modules (digital/analog), power supply, and communication modules. Some systems also include specialty modules such as motion control or safety modules. All these modules connect via the backplane.