GE IS200TDBSH2ACC Mark VI Simplex Contact Input/Output Terminal Board

Product Overview

The GE IS200TDBSH2ACC functions as a high-density Simplex Contact Input/Output Terminal Board within the General Electric Mark VI and Mark VIe Distributed Control System (DCS) architectures. This board facilitates the interface between field discrete devices and the control core by processing 24 group-isolated contact inputs and executing commands via 12 Form-C relay outputs. We supply this component as 100% Brand New and Original, providing the robust electrical isolation and signal integrity required for heavy-duty turbine and industrial process control.

Technical Specifications

The TDBSH2ACC utilizes surface-mount technology (SMT) to pack high-channel counts into a space-efficient DIN-rail mountable footprint.

Engineering Advantages

• Comprehensive Noise Suppression: The IS200TDBSH2ACC incorporates onboard noise suppression circuitry for all 24 contact inputs. This feature protects the system against high-frequency interference and voltage surges, ensuring clean signal transition in electrically noisy power plant environments.

• Flexible Wetting Voltages: The terminal board accepts external wetting voltages of 24, 48, or 125 V DC through the JE1 3-pin Mate-N-Lok connector. This versatility allows engineers to match the field instrument power requirements without adding external conditioning hardware.

• Expandable Relay Functionality: JW1 and JW2 connectors allow the board to host different option cards. These expansions enable specialized relay functions or additional signal conditioning, providing a scalable solution for evolving process needs.

• Streamlined PDIO Integration: In Mark VIe configurations, a PDIO I/O pack plugs directly into the D-type connector on the TDBS board. This setup digitizes the I/O signals and communicates them over Ethernet to the controller, simplifying the wiring from the field to the control room.

• Versatile Mounting Options: The board supports both DIN-rail and flat-surface mounting. Its compact 8.6 cm width allows for high-density installation in standard 19-inch cabinets, maximizing available cabinet real estate.

FAQs

• Can the IS200TDBSH2ACC handle 125 V DC contact inputs?

  Yes. While the board circuitry operates on 24 V DC, the contact inputs are designed to accept a nominal 24, 48, or 125 V DC wetting voltage from an external source, provided the external supply is wired to the JE1 connector.

• What is the benefit of a "Form-C" relay output?

  Form-C relays provide both Normally Open (NO) and Normally Closed (NC) contacts with a common terminal. This allows for fail-safe wiring configurations, where a specific state is maintained even during a loss of control power.

• How does the board communicate with the Mark VIe controller?

  The board itself is passive; it relies on a PDIO I/O pack. The PDIO converts the terminal board signals and transmits them via IONet (Ethernet) to the controllers, supporting one or two network connections for redundancy.

• Is this board compatible with TMR systems?

  The TDBSH2ACC is a Simplex board. For Triple Modular Redundant (TMR) applications, GE typically utilizes the TDRS or similar terminal boards designed to interface with three I/O packs simultaneously.