DS200DTBAG1AAA - Digital Input/Output Terminal Board

SPECIFICATIONS:

Part Number: DS200DTBAG1AAA
Manufacturer: General Electric
Series: Mark V LM
Product Type: Digital Input/Output Terminal Board
Supported Turbines: LM2500, LM6000, and other LM-series turbines
Input Voltage Range: 18 � 30 VDC
Supported Processors: R, S, T Controllers
Output Voltage: 24 VDC
Scan Rate: 10 � 40 ms
Operating Temperature: 0�C to +60�C
Size: 8.26 cm high x 4.18 cm
Repair: 3-7 days
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS200DTBAG1AAA is a Digital Input/Output Terminal Board manufactured and designed by General Electric as part of the Mark V LM Series used in GE Aeroderivative Gas Turbine Control Systems such as the LM2500, LM6000, and similar models. It provides the physical interface for connecting field digital signals to the turbine control system. It is designed to process discrete (on/off) signals from external equipment such as switches, relays, sensors, solenoids, and interlocks. Each board supports either digital input (DI) or digital output (DO) functionality, and may be installed in redundant configurations to enhance system reliability.

INSTALLATION:

The Digital I/O Terminal Board involves mounting it securely within the Mark V LM control panel, typically on a DIN rail or directly onto the backplane. Field wiring is connected to the board via screw-type or clamp-type terminal blocks, ensuring secure and durable electrical connections. Digital input terminals are connected to dry contacts or sensors such as pressure switches, while output terminals connect to devices like relays, contactors, or indicator lights. In many cases, the output terminals are protected by individual fuses to guard against short circuits or overloads. An external 24V DC power supply is commonly used to power output devices, and proper grounding and shielding must be observed to minimize the risk of electrical interference or signal distortion.

COMPATIBILITY:

The Digital I/O Terminal Board is fully compatible with GE�s Mark V LM control system architecture and supports integration with key processor modules including R, S, and T. It works in conjunction with I/O processor boards such as the STCA, STCB, or DCCA, forming part of a cohesive and synchronized control environment. These boards are specifically designed to accommodate the unique demands of LM-series turbines and support standard 24V DC field devices commonly found in industrial and power generation settings. Their compatibility ensures ease of replacement, seamless communication with control logic, and flexibility in configuring both simple and complex turbine applications.

OPERATION:

The Digital Input/Output Terminal Board continuously monitors and processes discrete signals from connected field devices. Digital input channels detect the presence or absence of voltage and convert this to binary data (ON/OFF) for use by the turbine�s control processors. Built-in filtering helps eliminate false signals due to electrical noise, and diagnostics alert operators to issues such as open circuits or grounding faults. Digital output channels receive logic signals from the controller and activate associated field devices accordingly, such as energizing a relay or triggering an alarm. In systems configured for Triple Modular Redundancy (TMR), the board works in concert with redundant controllers to ensure high availability and fault tolerance. Outputs are managed with precision and safety in mind, making the board essential for implementing start/stop sequences, protective tripping, and other automated control functions within the turbine system.

WOC maintains the largest inventory of Replacement parts for GE Aeroderivative Gas Turbine Control Systems. Additionally, we offer warranty-backed unused and rebuilt boards as well as board repairs for your damaged ones. For your OEM needs, our team of professionals is available around the clock. We at WOC are happy to help you with any needs you may have in terms of automation. Please contact our team by phone or email for pricing and availability on any components and repairs.

FREQUENTLY ASKED QUESTIONS:

What is the main function of the Digital I/O Terminal Board in the Mark V LM system?

The Digital I/O Terminal Board interfaces field devices (such as sensors, switches, and relays) with the control system, handling discrete input and output signals required for turbine monitoring, sequencing, and protection.

How many digital input and output channels are supported on one board?

Depending on the model, each board typically supports 16, 24, or 32 channels of digital inputs or outputs. Some boards may combine both input and output functions.

What voltage is required to operate the input channels?

The digital input channels typically require 24 VDC nominal voltage, with an acceptable range between 18 to 30 VDC.